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  • 更新日期:2020-01-21
  • Co-estimation of state of charge and state of power for lithium-ion batteries based on fractional variable-order model
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-21
    Xin Lai; Long He; Shuyu Wang; Long Zhou; Yinfan Zhang; Tao Sun; Yuejiu Zheng

    This paper proposes a co-estimation scheme of the state of charge (SOC) and the state of power (SOP) for lithium-ion batteries in electric vehicles based on a fractional-order model (FOM). First, a series of FOMs and integer-order models (IOMs) is constructed using fractional- and integer-order calculus. The model parameters are then identified using particle swarm optimization over the whole SOC range, and the complexity and accuracy of the resulting models are evaluated. Second, a fractional-order extended Kalman filter-based SOC estimator is developed. Third, the co-estimation of SOC and SOP is formulated, and an SOP estimation method based on three restrictions and a correction method from constant-current to constant-power are proposed. Finally, the proposed model and method are verified by experiments. The main results are as follows: (1) The FOMs achieve better accuracy than IOMs over the whole SOC range (especially in the low SOC range), and the FOM with a pair of resistance-constant phase elements and one Warburg element (FO-2RCW) producing the best performance. (2) The SOC estimation accuracy based on the FO-2RCW with variable parameters and orders is less than 2% over the whole SOC range. (3) The proposed co-estimation method is validated to be effective under the dynamic operating conditions and shows high accuracy.

    更新日期:2020-01-21
  • Cutting carbon footprints of vegetable production with integrated soil - crop system management: A case study of greenhouse pepper production
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-21
    Xiaozhong Wang; Bin Liu; Gang Wu; Yixiang Sun; Xisheng Guo; Guoqing Jin; Zhenghui Jin; Chunqin Zou; Dave Chadwick; Xinping Chen
    更新日期:2020-01-21
  • A preference-based demand response mechanism for energy management in a microgrid
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-21
    Igor R.S. da Silva; Ricardo de A. L. Rabêlo; Joel J.P.C. Rodrigues; Petar Solic; Arthur Carvalho

    In this work, a preference-based, demand response (DR) multi-objective optimization model based on real-time electricity price is presented to solve the problem of optimal residential load management. The purpose of such a model is threefold: 1) to minimize the costs associated with consumption; 2) to minimize the inconvenience caused to consumers; and 3) to minimize environmental pollution. Potential solutions to the underlying multi-objective optimization problem are subject to a set of electrical and operational constraints related to home appliances categories and the utilization of distributed energy resources (DER) and energy storage systems (ESS). The use of the proposed model is illustrated in a realistic microgrid scenario where suitable solutions were found by the Non-Dominated Sorting Genetic Algorithm III (NSGA-III). These solutions determine new operational periods for home appliances as well as the utilization of DER and ESS for the planning horizon while considering consumer preferences. Besides helping consumers to take advantage of the benefits offered by DR, the experimental results show that the multi-objective DR model together with the NSGA-III algorithm can effectively minimize energy-consumption costs as well as reduce inconvenience costs and environmental pollution.

    更新日期:2020-01-21
  • Price volatility in the carbon market in China
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-21
    Jingye Lv; Ming Cao; Kuang Wu; Haifeng Li; Ghulam Mohi-ud-din

    China is the world's largest developing country and a carbon dioxide emitter. A functional carbon market can effectively reduce carbon emissions. This paper uses the Markov chain Monte Carlo-stochastic volatility model and the wavelet multi-resolution model to analyze the volatility of price returns and the dynamic characteristics of price fluctuations in the carbon pilot markets in Hubei, Shanghai, and Shenzhen. The price movements in these markets are compared to the emissions trading system of the European Union (EU-ETS). The results show that there is a volatility clustering in the price of carbon trading in Hubei, Shanghai, Shenzhen and the EU-ETS. China's carbon pilot markets have a deficiency in terms of volatility stability, as does the EU-ETS. From a long-term perspective, China's carbon market lacks a detailed development plan, which is vital because the construction of the market system is not yet optimal. From a short-term view, China's carbon market is not active and the participants' attitude toward risk is extremely sensitive.

    更新日期:2020-01-21
  • 更新日期:2020-01-21
  • Recalculating climate change consensus: The question of position and rhetoric
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Ferenc Jankó; Áron Drüszler; Borbála Gálos; Norbert Móricz; Judit Papp-Vancsó; Ildikó Pieczka; Rita Pongrácz; Ervin Rasztovits; Zsuzsanna Soósné Dezső; Orsolya Szabó

    Quantifying the consensus on anthropogenic climate change and its communication have become a controversial research subject in recent years. This paper utilized a reference list from a climate skeptic report and a previously published quantitative method of consensus research to revisit the theoretical and methodological questions. Beyond rating the abstracts according to their position on anthropogenic global warming (AGW), this study classified the strategic in-text functions of the references. Results not only showed the biased character of the literature set, but also revealed a remarkable AGW endorsement level among journal articles that took a position concerning AGW. However, this paper does not argue for modified consensus numbers, but instead emphasizes the role of ‘no position’ abstracts and the role of rhetoric. Our quantitative results provided evidence that abstract rating is a suboptimal way to measure consensus. Rhetoric is far more important than it appears at first glance. It is important at the level of scientists, who prefer neutral language, and at the level of readers such as report editors, who encounter and re-interpret the texts. Hence, disagreement appears to stem from the disparate understanding and rhetorically supported interpretation of the research results. Neutral abstracts and papers seem to provide more room for interpretation.

    更新日期:2020-01-21
  • Institutional conditions, sustainable energy, and the UN sustainable development discourse: A focus on Haiti
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Claudel Mombeuil

    The achievement of the UN sustainable development goals (SDGs) necessitates quality government institutions and effective government intervention and also the genuine engagement of institutional stakeholders (e.g., NGOs, civil society organizations) and businesses alike. This study seeks to provide supportive evidence that the UN sustainable development goals, Goal 7 (Ensure access to affordable, reliable, sustainable and modern energy for all) in particular, are unrealistic within the institutional conditions of Haiti. To this end, we explore the trends in worldwide governance indicators, corruption perception index, human development index, socioeconomic sustainability, gross domestic product, environmental performance index using datasets spanning from 2002 to 2017. We also explore the trends in energy use, electric power consumption, and fossil fuel energy consumption using datasets from 1994 to 2014. The results show disappointing trends in all these indicators, indicating the persistence of ill-governance and corruption as well as severe social, economic, and environmental problems. Particularly, the negative trends in the worldwide governance indicators such as government effectiveness, regulatory quality, rule of law, and control of corruption) provide substantial evidence that Haiti's institutional conditions are too weak to support the achievement of the SDGs, deployment of renewable energy in our case. Moreover, the absence of the political will to curtail corruption and the willingness of the elites of Haiti to maintain the status quo of the chaotic socio-economic and institutional conditions upon which their wealth has been built make the SDGs even more unrealistic. We advocate for conscious efforts and sacrifices by the elites to get Haiti out of its current chaotic socio-economic and institutional conditions. Thereby, we outline the need for effective government intervention to facilitate institutional reforms and market reform and also the genuine engagement of the elites and institutional stakeholders in sustainable development discourse.

    更新日期:2020-01-21
  • Investigating the “circular propensity” of road bio-binders: effectiveness in hot recycling of reclaimed asphalt and recyclability potential
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Lorenzo Paolo Ingrassia; Xiaohu Lu; Gilda Ferrotti; Carla Conti; Francesco Canestrari

    In pavement engineering, the use of bio-binders and reclaimed asphalt (RA) promotes the principles of sustainability and circular economy, without penalizing or even improving the performance. In this regard, this study focuses on the “circular propensity” of bio-binders obtained by partially replacing a conventional bitumen with a bio-oil generated as a residue by the wood and paper industries. Specifically, the objectives are: 1) to assess the effectiveness of bio-binders in the hot recycling of traditional RA and 2) to evaluate, in a long-term perspective, their recyclability potential. For this purpose, two severely aged binders (one “RAP” binder recovered from reclaimed asphalt and one laboratory-produced “Bio-RAP” binder) and two fresh binders (one bio-binder and one bitumen) are blended to reproduce four hot recycled binders. The mechanical behaviour and the aging susceptibility of these blends are compared to those of a control virgin bitumen. The experimental investigation includes conventional tests, rheological testing and modelling (modified CAM model) as well as chemical analysis (Fourier transform infrared spectroscopy). The main results indicate that the hot recycling of reclaimed bio-asphalt (bio-RA) may lead to mixtures less susceptible to cracking as compared to the recycling of conventional RA, as well as the use of bio-binders in the hot recycling of conventional RA may be beneficial in terms of cracking. Even though the blends with the bio-binder are characterized by a lower aging rate, the permanent deformation behaviour of all the recycled blends studied is comparable in unaged and short-term aged conditions, i.e. the circumstances under which rutting is usually a concern. Finally, the recycled blends show significantly lower aging susceptibility than the control bitumen. Overall, these results suggest that the bio-binders studied are effective in the hot recycling of RA and 100% recyclable, and their use in asphalt pavements can lead to significant technical and environmental benefits.

    更新日期:2020-01-21
  • Catalytic pyrolysis of woody oil over SiC foam-MCM41 catalyst for aromatic-rich bio-oil production in a dual microwave system
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Zhenting Yu; Lin Jiang; Yunpu Wang; Yanzhi Li; Linyao Ke; Qi Yang; Yujie Peng; Jiamin Xu; Leilei Dai; Qiuhao Wu; Yuhuan Liu; Roger Ruan; Donghua Xia; Li Jiang
    更新日期:2020-01-21
  • 更新日期:2020-01-21
  • A methodology for the assessment of pedestrians-cyclists shared space level of service
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Andreas Nikiforiadis; Socrates Basbas

    The limited available public space and the intention to promote active mobility, enhance the importance and the interest about pedestrians-cyclists shared spaces. This paper proposes a new methodology for determining the level of service (LOS) in shared spaces, based on the hindrance concept. In this context: a) the types of events between the users were identified, b) regression tree models for predicting the events’ frequency were developed, c) weights were assigned to the various events, based on their negative impact on users' perceived comfort and safety. The assignment of weights consists a novelty of the proposed methodology since there is no other study attempting to identify their negative impact. Eventually, a mathematical formula suitable for optimizing the design and management of pedestrians-cyclists shared spaces, by minimizing users’ hindrance, is being produced. The objective of the methodology is to be a reliable and easy to use tool for planners and decision-makers. From the application of the methodology in the city of Thessaloniki, Greece, it is identified that: a) the pedestrian and bicycle flow rates play a decisive role in the frequency of experiencing events, b) “delayed passing” is the most disturbing situation for both pedestrians and cyclists, c) “passings” have similar negative impact on users’ perceptions with “meetings”.

    更新日期:2020-01-21
  • An Analysis of Relationship between Environmental Regulations and Firm Performance with Moderating Effects of Product Market Competition: Empirical Evidence from Pakistan
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Sohail Ahmad Javeed; Rashid Latief; Lin Lefen

    Many countries are facing environmental issues that affect the natural climate and life of human beings, therefore, governments have developed the strategies and regulations to control the industrial negative effects on the environment which is called environmental regulations (ER). To extend the porter hypothesis, we examined the moderating effect of product market competition (PMC) to find the circumstances that affect the association between ER and FP. We have divided PMC into high and low product market competition (HPMC and LPMC) by following the Herfindahl-Hirschman Index (HHI). The empirical investigation of this study demonstrates the following outcomes: ER indicates a statistically significant and positive relationship with FP. Furthermore, HPMC has great importance for FP, while LPMC has shown a negative relationship with FP. Besides, we tested the moderating effects of HPMC and LPMC on the association between ER and FP. The moderating effects of HPMC have significant and positive effects on the association between ER and FP. On the other side, the moderating effects of LPMC have significant and negative effects on the association between ER and FP. Moreover, this study promotes the importance of ER and PMC for firms. This study is beneficial for owners, investors, policymakers, and governments to form comprehensive and viable ER for reducing environmental negative effects.

    更新日期:2020-01-21
  • Power generation from cheese whey using enzymatic fuel cell
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Han Suk Choi; Xiaoguang Yang; Dong Sup Kim; Ji Hyun Yang; Sung Ok Han; Chulhwan Park; Seung Wook Kim

    As an organic waste of dairy manufacture, cheese whey was considered to be an environmental pollutant because of its high lactose content. Reutilization of lactose from cheese whey for power generation could be a novel solution for dairy industry. In this study, lactose was demonstrated as a fuel for power generation by enzymatic fuel cell (EFC) using cellobiose dehydrogenase (CDH). The enzyme was immobilized and characterized on the mediator modified electrode. To enhance the performance, various factors of this EFC system such as enzyme concentration, reaction pH, and initial concentration of lactose were investigated. The maximum current and power density were obtained at CDH concentration of 47.07 mg/ml and 100 mM lactose at pH 4.5 for EFC. The open circuit voltage and maximum power density of the EFC at optimum conditions were 0.52 V and 2,973 μW/cm2, respectively. Additionally, the cheese whey from dairy industry was directly demonstrated in this EFC and power density of 1,839 μW/cm2 was obtained. These results indicated positive prospects of cheese whey for the application of power generation, which demonstrated the feasibility of the organic waste from diary manufacture to produce a clean product.

    更新日期:2020-01-21
  • Different alkaline minerals interacted with biomass carbon during pyrolysis: Which one improved biochar carbon sequestration?
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Hongyan Nan; Ling Zhao; Fan Yang; Yang Liu; Ziyue Xiao; Xinde Cao; Hao Qiu
    更新日期:2020-01-21
  • Waste green coconut shells: Diagnosis of the disposal and applications for use in other products
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Luane A. Nunes; Maria L.S. Silva; Juliano Z. Gerber; Ricardo de A. Kalid
    更新日期:2020-01-21
  • Coal biomethanation potential of various ranks from Pakistan: A possible alternative energy source
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-20
    Aneela Younas Malik; Muhammad Ishtiaq Ali; Asif Jamal; Uzma Farooq; Nazia Khatoon; William H. Orem; Elliott P. Barnhart; John R. SanFilipo; Huan He; Zaixing Huang

    The present study investigated the possibility of microbial transformations of coal to gas (biogasification) as an alternative to conventional coal mining because this approach has the potential to be less expensive, cleaner, and providing greater access to deeper coal resources. Biogasification is often associated with low rank coal such as lignite and subbituminous coal that have produced enough coalbed methane to be commercially viable in the United States and Australia. However, little work has been done to analyze the potential of biogasification in higher rank coal. For this purpose, bioassay using a wetland-derived consortium, and a coal-derived consortium were used to analyze coal samples from Pakistan belonging to different ranks (lignite to semi-anthracite). Among all samples a low volatile bituminous coal produced the maximum methane 34.95 μmol CH4/g coal with the wetland-derived microbial consortium, followed by subbituminous coal (30.18 μmol CH4/g coal). Lower methane levels were recorded with the coal-derived consortium with subbituminous coal, yielding the highest concentration (25.1 μmol CH4/g coal). Methane levels appeared to be increasing on the last measurement indicating the coal-derived consortium was slower than the wetland-derived consortium but could still catalyze biogasification in higher rank coals. Quantitative polymerase chain reaction analysis for mcrA functional genes suggested that the microbial community members that produce methane (methanogens) varied during the incubations. Energy conversion efficiency of different strategies (other biological and underground coal gasification processes) was also compared and discussed. This study was the first to compare bioassay using consortia of microbes non-indigenous and indigenous to coal and indicate the potential of biogasification from many different coalbeds across Pakistan.

    更新日期:2020-01-21
  • Solar energy harvesting potential of a photovoltaic-thermoelectric cooling and power generation system: Bidirectional modeling and performance optimization
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-18
    Yang Cai; Lei Wang; Wei-Wei Wang; Di Liu; Fu-Yun Zhao

    In the present work, a comprehensive thermodynamic and exergoeconomic comparison between concentrated photovoltaic-thermoelectric cooling (CPV-TEC) and concentrated photovoltaic-thermoelectric generation (CPV-TEG) systems was introduced and explored, aiming to actively investigate the energy harvesting potential of the photoelectric-thermoelectric cooling and power generation processes. Transitional characteristics of thermoelectric conversion in concentrated photovoltaic-thermoelectric hybrid (CPV-TEH) system have been outlined through multiple evaluation indicators, including output electricity, cell temperature, thermodynamic efficiency, exergy destruction and unit exergy cost under various decision parameters. Furthermore, operating mode and conversion conditions of thermoelectric device in CPV-TEH system have been sensitively identified to obtain the dual action mechanism of cooling and power generation sequentially. Theoretical models have been compared and validated well with former published results. Results indicate that the operating mode of thermoelectric device could be fully converted from TEG to TEC when the operating current is around 0.27 A; the minimum unit exergy costs are respectively found to be 0.263 $/kwh, 0.148 $/kwh and 0.113 $/kwh for CPV-TEG system and 0.266 $/kwh, 0.152 $/kwh and 0.118 $/kwh for CPV-TEC system at CG = 1, 2, and 3 kW/m2. Present research may be helpful for the design and optimization of the CPV-TEH system to harvest the thermal and electric energy from the sunlight, thus enhancing its energy conversion efficiency.

    更新日期:2020-01-21
  • Goats or pigs? Sustainable approach of different raising systems fed by maize silage
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-18
    Lyu Yun; Li Jing; Hou Ruixing; Zhu He; Zhu Wanxue; Hang Sheng; Ouyang Zhu

    The ecological livestock husbandry tends to be popular in China but the real situation is many models appeared without scientific analysis. And very limited theoretical researches compared ecological breeding systems and livestock species on environmental and economic and carrying capacity aspects. To choose the best pig-raising method and compare it with the goat raising system, this study combined emergy evaluation methods and economic analysis methods and livestock carrying capacity evaluation methods to gain the objective results. Pigs raising systems all performed little weaker than the goats raising system in the environment-friendly aspect. But the pigs raising systems were good at the aspects of economy and livestock carrying capacity. The 80% maize silage added fodder in the pigs fattening period (Pig-raising system Group A (PA)) performed excellently. The yield-based economic profit (Py) and profit rate (BCR) of PA increased by 2%–13% and 7 %-48%, respectively, compared to the other two pig-raising systems (Pig-raising system Group B (PB) & Group C (PC)). Meanwhile, the emergy yield ratio (EYR) and the emergy loading ratio (ELR) of PA were 0.2%–2% and 1%–3% lower than the other two systems (PB&PC), respectively. And emergy sustainability index (ESI) of PA was about 1% better than PB and PC. Furthermore, the livestock carrying capacity based on planting area (L1) and fertilized area (L2) of PA performed 18%–210% and about 14% better than PB and PC, respectively. To some extent, pigs could tolerate extreme high concentration of the maize silage added into the fodder. Moreover, a high concentration of maize silage added to the fodder of pigs did not result a sharp drop in the yield. On the contrary, the higher concentration of maize silage added to the fodder increased more economic benefits and gained more sustainability and improved the livestock carrying capacity of the ecological pigs raising system.

    更新日期:2020-01-21
  • Solar-light-active silver phosphate/titanium dioxide/silica heterostructures for photocatalytic removal of organic dye
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-18
    Nadeem Raza; Waseem Raza; Hajera Gul; Mudassar Azam; Jechan Lee; Kumar Vikrant; Ki-Hyun Kim
    更新日期:2020-01-21
  • A Review of Ground Waste Glass as a Supplementary Cementitious Material: A Focus on Alkali-Silica Reaction
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-18
    Eduard Tora Bueno; Jerry M. Paris; Kyle A. Clavier; Chad Spreadbury; Christopher C. Ferraro; Timothy G. Townsend

    The use of glass as an amendment to portland cement concrete serves as a potential alternative to traditionally used supplementary cementitious materials. The use of ground glass provides a potential remedy to issues currently faced by the portland cement industry due to dwindling fly ash production as a result of recent changes in fuel sources for power generation within the United States of America. This manuscript serves to provide the current state of the practice with respect to the use of glass as an alternative supplementary cementitious materials. The advantages and limitations of using glass as a cement replacement in the production of concrete are evaluated, particularly with respect to physical and chemical performance. This document summarizes the known performance characteristics of glass amended concretes and mortars, and identifies areas of research that are currently deficient. The general consensus found in the literature concludes that concrete with waste glass as a pozzolan is comparable to control with respect to workability, air content, density, tensile strength, and flexural strength. The compressive strength is reported to be lower than control at early ages, while comparable or higher than control at later ages. Furthermore, it has been reported that the modulus of elasticity is reduced. All of the reviewed literature reported a decrease in expansion caused by alkali-silica reaction when waste glass was used as a pozzolan, with some reporting expansion being reduced below evaluation limits; however, the majority of the evaluations performed used testing methods inappropriate for the inclusion of glass such as American Society for Testing and Materials C1567, limit the alkali content of supplementary cementitious materials to a maximum of 4.0%.

    更新日期:2020-01-21
  • Tracing the sources of air pollutant emissions embodied in exports in the Yangtze River Delta, China: A four-level perspective
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-17
    Xinxian Qi; Xiyan Mao; Xianjin Huang; Danyang Wang; Hongyan Zhao; Hong Yang

    Investigating the net effects of foreign trade on the local environment requires a multiscale perspective. Increasingly, scholars have been investing effort to establish a global–national–local system of linkages or a local–nonlocal division of linkages. However, analysis at the megaregion level has somehow been overlooked, although megaregions play a substantial role in the context of accelerating regional integration and increasing regional pollution. This study incorporated megaregions into the existing multiscale input-output model and constructed a four-level analytical framework to analyze the emissions embodied in exports (EEE) in the Yangtze River Delta (YRD) region. Since this region pioneered the economic transition in China, this study further applies structural decomposition analysis (SDA) to investigate the structural changes in EEE. The empirical results show that EEE in the YRD region was mainly affected by local and cross-border linkages, which account for 85.1% and 9.8% of the total EEE in the region. The increase in local EEE linkages needs to be reduced by local technological innovation in sectors such as light industry and energy. To prevent the YRD from becoming a pollution haven for developed countries, the cross-border EEE linkage must be reduced by adjusting the production and consumption structure of light industry. Cross-regional EEE linkage can be reduced through technology upgrades in the construction sector. The trend of a decrease in intraregional linkage and an increase in cross-regional linkage indicates that YRD exports tend to be outward rather than inward oriented. The four-level framework for examining EEE offers new detailed insights into the mitigation of regional air pollution.

    更新日期:2020-01-21
  • The flowing of microplastics was accelerated under the influence of artificial flood generated by hydropower station
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-17
    Jie Song; Chuanying Hou; Yang Zhou; Qi Liu; Xuefei Wu; Yuanjian Wang; Yujun Yi

    Rivers are considered the most important channel for microplastics traveling to the ocean from inland. The Yellow River is one of a main microplastics source for the Bohai Sea. As hydropower station operations—especially the artificial flood pulse—could significantly affect the transportation processes of microplastics, it is necessary to investigate the transportation regulation of microplastics from the Yellow River to the estuary. In this study, the distribution of microplastics (across 10 sections of the river from Xiaolangdi to the estuary) was detected at three stages (the pre-, inter-, and post-artificial flooding season). The result showed that the microplastic concentrations in the Yellow River ranged from 0.105 to 1.17 items m-2. The main microplastic shapes found were foam and film, and the main components were expanded polystyrene and polyethylene. The average particle sizes were 1101.54, 484.93, and 509.46 μm at the three stages, respectively. The artificial flood accelerated the transport of microplastics from inland to the estuary and ocean; it also unified the overall particle size of microplastics along the river. The microplastics in the surface water of the study area likely originate mostly upstream of the Xiaolangdi Hydropower Station. The artificial flooding generated from water and sediment regulation transports a large amount of microplastics in the reservoirs and river channels to the estuary and offshore areas in a short time period via artificial flooding.

    更新日期:2020-01-17
  • Understanding the Mechanism through which Adoption of Green Construction Site Practices Impacts Economic Performance
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-17
    Hilary Omatule Onubi; Nor’Aini Yusof; Ahmad Sanusi Hassan

    This paper examines the process through which a construction project’s implementation of green practices in its site processes influences its economic performance by meeting environmental performance standards. The uniqueness of this study stems from its focus on practices carried out on the construction sites, and the consideration of project economic performance as against corporate level performance. A conceptual model is proposed and tested using a sample of 168 construction projects completed by class A contractors in Nigeria. The data were analysed through the Partial Least Squares Structural Equation Modelling (PLS-SEM) technique. Results obtained showed that the model satisfied all the criteria for both the measurement model and structural model for formative constructs. The study results indicate that environmental performance only partially mediates the relationship between green construction site practices and economic performance. The results imply that, it is not in all occasions that a project meeting environmental performance standard will result in the construction project been economically profitable, as adopting green construction site practices could lead to economic performance without necessarily performing environmentally. It is recommended that contractors should exhibit some level of flexibility while adopting green practices on site in order to achieve a balance between green practices, environmental performance and economic performance.

    更新日期:2020-01-17
  • Dietary recommendations in Spain –affordability and environmental sustainability?
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-17
    Sara González-García; Rosemary F. Green; Pauline F. Scheelbeek; Francesca Harris; Alan D. Dangour
    更新日期:2020-01-17
  • 更新日期:2020-01-17
  • A new facile process to remove Br- from waste printed circuit boards smelting ash: thermodynamic analysis and process parameter optimization
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-17
    Gongqi Liu; Yufeng Wu; Bin Li; De’an Pan; Feihua Yang; Junqing Pan; Yishu Wang; Na Cheng
    更新日期:2020-01-17
  • Improving energy efficiency using the most appropriate techniques in an integrated woolen textile facility
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-16
    Emrah Ozturk; Nazlı Caglar Cinperi; Mehmet Kitis

    The textile industry has a high share in the total energy consumption of the manufacturing industry, especially in global textile supplier countries. Energy consumption and air emissions can be reduced at the source with detailed cleaner production and energy efficiency applications in textile production processes. In this study, energy efficiency studies were carried out in an integrated woolen textile facility. In this context, energy consumptions were analyzed based on the main production and other preparatory processes by detailed onsite investigations. Specific electricity, thermal energy, and air emissions were calculated based on the production processes of the facility. In addition, specific energy consumption values were compared with similar textile facilities to evaluate energy saving potentials and opportunities. A list consisting of 85 energy efficiency techniques was prepared to reduce energy consumption and air emissions in the facility. These techniques were evaluated and prioritized in terms of techno-economic feasibility, potential savings, and environmental benefits using a systematic decision-making model. Ultimately, it was decided to apply the following priority energy efficiency techniques (a total of 13): process optimization, the establishment of a process-based energy monitoring and control system, the recovery of waste heat, the optimization of steam boilers, the modification of radio frequency (RF) dryers, the modification of fan motors in the ventilation-humidification system, the proper positioning of compressors, the installation of a compressor monitoring system, and an air emission treatment system. It was found that with the application of such techniques, electricity, thermal energy, and air emissions could be reduced by 8–27%, 12–28%, and 23–45%, respectively. Based on the financial analysis, the payback periods of the priority energy efficiency techniques were found to be generally less than 36 months.

    更新日期:2020-01-17
  • Prioritizing and overcoming barriers to integrated management system (IMS) implementation using AHP and G-TOPSIS
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-16
    Muhammad Ikram; Robert Sroufe; Zhang Qingyu

    The implementation of Integrated Management Systems (IMS) has become a prerequisite for any organization looking to transform itself into a competitive and more sustainable enterprise. However, these efforts are not successful for some organizations, and there is an opportunity to explore what it takes to have an effective IMS implementation. Prior studies attribute several barriers to implementation. Yet, little is known about the degree to which these barriers impede implementation. To fill this gap in the literature, we have developed a systematic framework to prioritize barriers. We first identify and classify barriers using a literature review and modified Delphi method providing twenty-six barriers categorized under six main categories. These included Resources and Management, People, Implementation, Economic, Social & Legal and Cultural. Next, we used Analytical Hierarchical Process (AHP) to calculate weights and rankings of barriers and sub-barriers. We then take this process a step further by using a Grey preference by similarity to ideal solution (GTOPSIS) methodology to further prioritize alternatives. The results reveal the implementation and social & legal barrier categories ranked highest among major categories. Overall rankings showed that the economic and implementation sub-barrier is more important than the other twenty-four sub-barriers within different categories. The contributions of this study provide new insights regarding levels of integration and employee motivation as important to overcoming barriers to implementation. Finally, a sensitivity analysis checked the robustness of the proposed research framework that could be implemented to overcome the IMS barriers. This study is the first of its kind to organize barriers of IMS in this way. The outcomes of this study will assist organizations and policymakers in their decision making regarding IMS implementation while simultaneously improving sustainability practices. Researchers will find new IMS implementation insights and constructs for further empirical investigation.

    更新日期:2020-01-17
  • Enacting sustainable transitions: a case of biogas production and public transport in Trøndelag, Norway
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-16
    Magnar Forbord; Lillian Hansen

    The background for this paper was a wish to extend the understanding of how sustainable transitions in sociotechnical systems come about, especially the characteristics of processes and the role of actors. The empirical context was the case of developing biogas production and improving transport in the Trondheim region in Norway. The case consisted of two connected units; establishment of a biogas plant (production side) and development of a sustainable public transport system (use side). As a template for the analysis, the Multilevel Perspective (MLP) on sociotechnical transitions was applied. The core in this perspective is the (sociotechnical) regime level, where changes have to occur in order for sustainable transitions to take place. Central at the regime level is the interaction between actors, technologies and institutions. Transitions can take place if actors experience threats from the external world and have access to niche innovations. Analysis of the case showed that the development first went through a transformation phase (ca. 1990-2009) where R&D actors developed basic technical innovations. In the next phase (2009-2019) there was a reconfiguration process were politicians and market actors engaged. Over the years, this process resulted in significant sustainability outcomes (increased production of biogas and exchange of fossil for biofuels in transport). Three major lessons can be drawn: 1) the crucial role of leadership when it comes to interpreting external changes, timing of actions and coordination of resources, 2) the necessity of new technological innovations and their adoption on regime level, and 3) differentiated state support can develop demand for renewable products and is necessary for compensating extra costs for niche actors.

    更新日期:2020-01-16
  • Footprint assessments on organic farming to improve ecological safety in the water source areas of the South-to-North Water Diversion project
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-16
    Danyang Feng; Guishen Zhao

    In recent decades, conventional intensive agricultural practices have led to serious non-point-source pollution in China and have imposed serious ecological threats to agroecosystems, especially in ecologically sensitive areas. The Middle Line of the South-to-North Water Diversion project, which covers one of the largest ecologically sensitive areas in China, began in December 2014. In the study area around the Danjiangkou Reservoir belonging to the Middle Line of the South-to-North Water Diversion project, organic farming has been encouraged instead of conventional farming. This study aimed to measure the difference in ecological safety between conventional and organic farming based on the ecological footprint combined with life cycle assessment, which integrated the assessments of carbon footprint (CF), water footprint (WF) and nitrogen footprint (NF). This paper hypothesized that the EF of organic farming in the target area would be lower than that of conventional farming because of the reduced chemical inputs. The results showed that, as expected, first, organic farming had a lower footprint with a higher ecological remainder than conventional farming in 2015, indicating that organic farming practices made greater contributions to regional ecological safety in the study area. Second, in conventional farming, the total grey water footprint (nitrogen, phosphorus pentoxide and potassium oxide) was much higher than that of the farms in which only nitrogen fertilizer were used, indicating that both phosphorus pentoxide and potassium oxide also play indispensable roles in water footprint evaluation. Third, the energy-related nitrogen footprint was greatest in organic farming, caused by higher diesel oil consumption due to greater farm size for mechanical operation. Finally, the methods of calculating the amount of ecological compensation were improved. According to reduced ecological footprints, an extra payment (CF = 115.17 CNY ha−1; WF = 0.09 CNY ha−1; NF = 102.20 CNY ha−1) for organic farming should be seriously considered by different stakeholders, due to its benefit to greater ecological safety. From the perspective of ecological footprints, ecological compensation policies for organic farming might effectively promote ecological safety in the South-to-North Water Diversion watershed in the future. Footprint, as an accounting tool, offers great potential in assessment of ecological safety and ecological compensation worldwide and needs to be further explored in more dimensions such as phosphorus footprint, biodiversity footprint and so on.

    更新日期:2020-01-16
  • Pilot and industrial scale tests of high-performance permeable bricks producing from ceramic waste
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-16
    Zhiqiang Yang; Zhiqin Qiang; Min Guo; Guilan Yi; Yonglin Shi; Fangqin Cheng; Mei Zhang

    Pilot and industrial scale tests for the preparation of permeable bricks were carried out in a refractory plant. The permeable bricks were firstly prepared using 82wt.% ceramic waste large aggregate by pilot test. The permeability, flexural strength and apparent porosity of the obtained permeable bricks can reach 3.2×10-2 cm/s, 6.8 MPa and 28%, respectively, and the relationships between these properties were studied. Moreover, industrial scale test was performed based on the best conditions of the pilot test, and 100 permeable bricks having a size of 140 mm × 280 mm × 80 mm were successfully produced using 600 kg of raw materials. The produced permeable brick has a high permeability of 3.0×10-2 cm/s, flexural strength of 6.3 MPa, as well as a relatively high apparent porosity of 26%, which exceed Chinese national standard GB/T 25993-2010. It has been found that a large number of through holes are homogeneously distributed within the permeable brick, which ensures the high permeability. Meanwhile, the binders make the aggregates interconnect with each other, guaranteeing sufficient mechanical strength. In addition, the energy consumption for whole producing process of permeable bricks is relatively low, about 1.4 MJ/kg. Hence, it is completely feasible to achieve industrial production of permeable bricks with good performance by using solid waste, which not only contributes to the construction of the sponge city, but also meets the requirements of cleaner production and brings obvious ecological and economic benefits.

    更新日期:2020-01-16
  • Designing ecologically-inspired robustness into a water distribution network
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-15
    Tirth Dave; Astrid Layton

    Eco-Industrial Parks (EIPs), network of industries that collaborate by utilizing each other's byproducts and wastes, are highly desirable for both the industries themselves, their environment, and governments due to their economic, environmental, and social advantages. Previous work has shown that EIPs are not as successful as they could be in terms of mimicking the behavior of biological ecosystems, highlighting that more work needs to be done for EIPs to truly mimic their biological-counterparts. The Kalundborg EIP, located in Kalundborg, Denmark, is a well documented example of an EIP with long-term success. Using the water network within the Kalundborg EIP as a case study, two bio-inspired networks are selected from an optimization based on the ecosystem metric robustness. The bio-inspired solutions are compared with a traditionally cost-minimized solution to understand what bio-inspired design can offer when a network is disturbed. Disturbances such as connection breakages and industry shutdowns are tested, showing that the bio-inspired designs require minimal recovery costs – in stark contrast to the traditional network solution. The results show that the bio-inspired designs reduce the network's dependence on a scarce import (freshwater) and have higher overall network resilience in the event of disturbances. The three network solutions are discussed from a ecological perspective, explaining differences from the standpoint of ecosystem characteristics. The analysis highlights the benefits of using ecology to understand the nature of and improve the design of industrial networks.

    更新日期:2020-01-15
  • Effect of water–fog particle size on dust fall efficiency of mechanized excavation face in coal mines
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Xueming Fang; Liang Yuan; Bingyou Jiang; Wenjun Zhu; Bo Ren; Minggong Chen; Min Mu; Guofeng Yu; Peng Li

    Respiratory dust and dust fall from the mechanized excavation faces of coal mines are crucial issues that require immediate attention. The dust fall technique for two-phase gas–water spraying is effective in solving these issues. We designed a spray dust fall simulated experimental system to test the dust fall efficiency for six grain sizes of water mist: D50 = 9.00 μm, 18.75 μm, 29.87 μm, 49.85 μm, 75.85 μm, and 116.47 μm, respectively. The results demonstrate that the smaller the D50 of the water mist particles, the better is the trapping effect of the respiratory dust. The main dust catching stage of water mist of different particle sizes is different. The main dust catching stage of water mist of small particle size is the initial contact stage of mist particles and respirable dust, while the main dust catching stage of water mist of large particle size appears later. The research findings will lay a theoretical groundwork for the application of new-type nozzle in the coal mines and provide technical support to the clean production of the coal mines.

    更新日期:2020-01-15
  • Energy, economic, environmental and engineering quantity optimization of industrial energy recovery network
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Ning Jiang; Wei Fan; Xiaodong Xie; Fengyuan Guo; Enteng Li; Shichao Zhao; Yingjie Xu

    The industrial energy recovery network has a large energy-saving potential. The retrofit of the original heat exchanger network (HEN) plays an important role in reducing energy consumption in existing process industries. However, a single economic or energy target is no longer sufficient to meet the retrofit needs of existing process industries. Therefore, an improved retrofit method that comprehensively considers many-objective is worthy of exploration. In this study, a many-objective optimization model with energy, economic, environmental and engineering quantity (4E) indexes for heat exchanger network retrofit is proposed, which avoids the one-sided analysis brought by single-objective optimization. The non-dominated sorting genetic algorithm based on reference point (NSGA-III) is applied to solve the proposed retrofit model. Three typical cases are used to verify and analyze the effectiveness and superiority of the proposed method. The case results show that the many-objective optimization method provides diverse retrofit options and flexibility to decision makers. Retrofit schemes with comparative energy, economic or environmental performance may take on notable difference in engineering quantity. Compared with the original networks, the retrofitted networks in the case studies can achieve a decrease in energy consumption up to 49.6%, a decrease in the total annual cost up to 22.2%, and a decrease in environmental impact up to 32.8%. Compared with the literature, the proposed method obtains optimization solutions with less energy consumption, capital cost, environmental impact and payback period.

    更新日期:2020-01-15
  • Loan Approval Evaluation Framework of Public-Private Partnership Project of Battery Storage Power Station under Interval-valued Intuitionistic Fuzzy Environment
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Geng Shuai; Lin lijun; Yin Yu; Yan Hui

    The main objective of this paper is to propose a loan approval evaluation framework of public-private partnership project (PPP) of battery storage power station (BSPS) for the commercial bank to evaluate and select the optimal project to provide the loan and then promote the development of BSPS-PPP. In order to achieve this goal, this study proposed a loan approval evaluation index system which consist of 5 attributes, 14 criteria and 45 sub-criteria. The novelty of this loan evaluation index system is that it reflects the basic requirement of loan approval of the commercial bank based on the characteristics of BSPS and PPP project, the commercial banks can better prepare for possible risks of BSPS-PPP. The proposed decision model was established based on the interval-valued intuitionistic fuzzy value (IVIFV) and interval number. Its novelty is that ①The model not only satisfies the experts’ expression habit of uncertainty, but also can be handled the uncertainty in the performance evaluation value and the criteria’s weights properly;②the proposed weight determining method based on the deviation maximization principle can not only maintain the will of decision makers as much as possible, but also decrease the uncertainty of weights. Finally, the effectiveness of loan approval evaluation framework was verified based on a case study of China. According to the application effect of the evaluation index system and the proposed model, 3 managerial implication are put forward.

    更新日期:2020-01-15
  • A Fuzzy Cognitive Mapping-System Dynamics Approach To Energy-Change Impacts On The Sustainability Of Small And Medium-Sized Enterprises
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Inês P.C. Pereira; Fernando A.F. Ferreira; Leandro F. Pereira; Kannan Govindan; Ieva Meidutė-Kavaliauskienė; Ricardo J.C. Correia

    Although large firms have already begun addressing energy efficiency issues and adopting “cleaner” types of energy, companies with fewer resources, such as small and medium-sized enterprises, are more reluctant to implement these measures. Given that strategies leading to energy sustainability have become a key aspect of business competitiveness, decision makers in small and medium-sized enterprises could clearly benefit from a new approach that provides a better understanding of energy-change impacts on their business activities. The present study combined fuzzy cognitive mapping and the system dynamics approach to develop an informed, transparent model for use in analyses of energy-change effects on the sustainability of small and medium-sized enterprises. This dual methodology facilitated an examination of cause-and-effect relationships between decision criteria and the clarification of dynamic interactions between variables from a holistic, real-world perspective, thereby enriching the extant literature. The results of the proposed decision-support system were validated by two senior staff members of the Directorate for Energy Sustainability Services of Portugal’s Directorate General for Energy and Geology. The advantages, limitations, and implications of our constructivist, process-oriented framework for research and practice are also discussed.

    更新日期:2020-01-15
  • Assessments of carbon footprint and energy analysis of three wind farms
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Jian-bo Xie; Jian-xun Fu; Si-yu Liu; Weng-sing Hwang

    Three kinds of turbines (Vestas V-47:660kW, Enercon E-40:600kW, Vestas V-66:1.75MW) were installed on three selected sites (Mailiao, Jhongtun, Chunfong) as wind power plants for electricity generation on an island. However, such power plants including turbines in establishment and operation during entire life cycle are bound to consume energy and produce carbon emission, causing environmental problems. Therefore, the purpose of the present study is to evaluate the effects of three wind power plants on the environment during their entire life cycle. This paper made the calculations of carbon emissions of three wind power plants, and compared and discussed the occupied shares of each primary energy input in manufacture, construction, operation and disposal phases using the methods of mathematics and materials input-output life cycle assessment. The results show that the CO2 emission factor of three systems was on average 3.9 g/kWh for the whole life cycle. The average CO2 emission intensity of all raw materials was 1.35 kg/kg. The occupied share of CO2 emissions in manufacturing, construction, and decommissioning phases was 44%, 16%, and 40% respectively. The primary energy input intensity was on average 0.0625 MJ/kWh of three systems for whole life cycle. The average energy input intensity of three systems was 21.48 MJ/kg. The combined CO2 emission intensity of all steel materials was 1.98 kg/kg. The demands for materials and energy inputs, and carbon emissions are positively related to the rated power value of a wind turbine. Wind power has a priority to produce clean energy, and can significantly decrease CO2 emissions.

    更新日期:2020-01-15
  • A review on energy, environment and economic assessment in remanufacturing based on life cycle assessment method
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Xugang Zhang; Mingyue Zhang; Hua Zhang; Zhigang Jiang; Conghu Liu; Wei Cai

    The shortage of resources and environmental pollution have become the social issues of world concern, they have seriously affected the sustainable development. Remanufacturing has been recognized as an effective technology helps to improve the energy and materials utilization, and reduce environmental emissions with a low cost. we performed a comprehensive literature review of assessing energy, environment, and economy in remanufacturing based on life cycle assessment method to summarize the development of remanufacturing technologies, conclude new progress of remanufacturing in energy, environment and economy and review the remanufacturing trend. Firstly, we reviewed the life cycle assessment (LCA) method and its application in remanufacturing assessment. Some remanufacturing assessment methods based on LCA were analyzed here. Secondly, a framework of assessing energy, environment, and economy in remanufacturing based on LCA was built. Corresponding assessment methods in remanufacturing were studied and summarized in dimensions of energy, environment and economy respectively. Then following the integrated studies of energy-environment-economic assessment in remanufacturing was also described. In this paper, the remanufacturing and assessment about energy, environment, economy based on LCA were described systematically, so as to better understand and apply LCA and promote remanufacturing. Finally, the limitations of the LCA method were discussed, furthermore, in order to catch up with the trend of the manufacturing industry, the integration of remanufacturing and emerging technologies was proposed at the end of the paper, which will be conducive to the continuous innovation of remanufacturing.

    更新日期:2020-01-15
  • Do government subsidies promote efficiency in technological innovation of China's photovoltaic enterprises?
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Boqiang Lin; Ranran Luan

    Supported by preferential policies and government funding, the technological innovation of China's photovoltaic industry has been improved greatly. As a capital-intensive practice, will innovation activities in China's photovoltaic industry be affected by the continuous decline of government subsidies in recent years? Therefore, it is essential to study the relationship between government subsidies and innovation performance of Chinese photovoltaic industry. However, there is less empirical research on this topic. In this context, this study aims to supplement existing studies by proposing a micro-level perspective to measure the innovation performance based on the data of Chinese listed photovoltaic companies from 2012 to 2016. Moreover, we assess the effects of government subsidies and other influencing factors on innovation performance. The findings reveal that, firstly, the average innovation efficiency of Chinese listed photovoltaic companies is over 0.9, which is relatively high. Secondly, government subsidies make a positive influence on innovation performance. Thirdly, financial leverage and ownership concentration have significant positive impacts, while firm size has a significant negative effect on the innovation efficiency of China's photovoltaic industry. The findings will serve as a reference for policy-making to promote further technological progress and sustainable development of China's photovoltaic industry.

    更新日期:2020-01-14
  • Multiple crosslinking strategy to achieve high bonding strength and antibacterial properties of double-network soy adhesive
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Shicun Jin; Kuang Li; Qiang Gao; Wei Zhang; Hui Chen; Jianzhang Li; Sheldon Q. Shi
    更新日期:2020-01-14
  • Efficiency performance of current Account-BoP flows in advanced world economies considering GHG emissions
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Ester Gutiérrez; Sebastián Lozano

    Current Account (CA) imbalances reveal the unequal Trade and Foreign Direct Investment (T&FDI) flows between various countries. This paper investigates the performance of the CA component of the Balance of Payments (BoP) of major advanced economies following the recent global financial and economic crisis (2013–2017) using a Data Envelopment Analysis (DEA) second-stage approach. Slack-based inefficiency (SBI) DEA models are proposed, using both a conventional perspective and a sustainability perspective that consider greenhouse gas (GHG) emissions as an undesirable output. The efficiency assessment aims to identify output slacks (i.e. exports and income inflows shortfalls) as well as input slacks (i.e. import and income outflows excesses). In the second stage, explanatory factors of the observed CA inefficiencies have been investigated, using regression models under frequentist and Bayesian frameworks. Although some differences exist between the Conventional and Sustainability scenarios regarding the negative effects of trade diversification and external debt and energy dependency on CA inefficiency, in both scenarios the results indicate links between CA inefficiency and geographical regions, socio-economic development and the burden of customs procedures.

    更新日期:2020-01-14
  • The effect of inspection on deterioration rate: An inventory model for deteriorating items with advanced payment
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Abolfazl Khakzad; Mohammad Reza Gholamian

    In many inventory deterioration problems of real world, deterioration rate of some items may be affected by other adjacent items. Accordingly, the effect of deteriorated items on other items could be declined by removing them through inspection. In this sense, an inventory model for deteriorating items is introduced in this paper, considering the effect of inspection times during the replenishment period on average deterioration rate. Also, supplier is considered to impose some prepayments to the retailer. In the proposed model, the average deterioration rate is related to the number of inspections at each period. Likewise, to illustrate the uniqueness of the solution, the convexity of the model is proved. Moreover, the proposed model is validated by discussing and analyzing a case study in Iran through which noticeable results are achieved. The findings indicate that compared to previous models, the proposed model is superior in cost management.

    更新日期:2020-01-14
  • Investigating the impacts of driving factors on urban heat islands in southern China from 2003 to 2015
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-14
    Kai Liu; Xueke Li; Shudong Wang; Yao Li

    Southern China is susceptible to urban heat island (UHI) effect due to the rapid urbanization and subtropical climate. However, comprehensively assessing long-term UHI and its driving factors across southern China remains elusive. In this study, we investigate the UHI effect and its relationship with several critical factors in the urban agglomerations of southern China from 2003 to 2015 using remotely sensed derived products and land surface Noah model outputs. Results indicate that (1) the UHI intensity (UHII) in southern China is 1.49 K with an increasing trend of 0.011 ± 0.004 K per year. This relates to the land cover changes caused by the urbanization, which explains ∼40% of UHII trend variance; (2) Resided in the subtropical maritime climate, UHII across southern China is closely related to two climate factors: solar radiation and precipitation. Specifically, the adverse impact of precipitation on UHII is significant across southern China, where sufficient rainfall can modify soil moisture condition and improve the thermal regulation of watershed; (3) Diurnal temperature range and surface net radiation that describes surface property cannot fully explain UHII across southern China. Nevertheless, variations of sensible flux and latent flux correlate better with UHII. The sensible flux (associated with aerodynamic roughness) is responsible for 32% of UHII while the latent flux (attributed to evaporation cooling) is responsible for 13% of UHII. This result underscores the substantial contribution of sensible flux on UHI. In addition, our study suggests the effect of anthropogenic intervention may could explain the inconsistent performances of heat fluxes in responding to UHI. Our findings highlight the significance of land-atmosphere controlling factors on UHI, which have practical implications for researching urban climate.

    更新日期:2020-01-14
  • The application of the yield approach to study slurry migration in drill cuttings waste underground disposal
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Chaobin Guo; Xiaoyu Wang; Cai Li; Keni Zhang; Zuansi Cai

    The underground disposal of drill cuttings waste is a common practice for the gas/oil industry to achieve zero-discharge sustainable development. In this study, a numerical modeling approach was developed to simulate the slurry flow for underground disposal of drill cuttings waste. The modeling approach was coupled with and implemented in the well-known general purpose subsurface multiphase flow simulator, TOUGH2. The new modeling approach treats the slurry flow behavior in subsurface systems as Bingham plastic liquid, with a linear relationship representing the yield stress and the concentration of the gelatinizer in the slurry. In addition, the precipitation-dissolution process was taken into account for solid-aqueous phase changes of the water-slurry mixture under and over the threshold pressure. The model has been verified by the analytical solution of a transient flow of single-phase Bingham fluid, and has further been tested by modeling field-scale injection of drill cutting wastes into a multi-layered geological formation in Texas. A hypothetical model has also been used to conduct sensitivity analysis of the impact of slurry density, injection depth and injection pattern on the storage formation performance. The results revealed that the effect of injection volume is greater than the mass on pressure buildup. In addition, a short period of intermittent reinjection can lead to an earlier formation breakdown due to particle sedimentation and reduce the storage capacity. The developed model can be used to evaluate the prediction of slurry transport, storage capacity, pressure distribution, and the formation breakdown time in a drill cuttings waste disposal project.

    更新日期:2020-01-13
  • Comparative study of municipal solid waste disposal in three Chinese representative cities
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Ning Duan; Dan Li; Ping Wang; Wenchao Ma; Terrence Wenga; Lei Zhong; Guanyi Chen

    China is facing severe environmental problems, the total municipal solid waste (MSW) generation has dramatically increased and presented great challenges all over the country. Cities have different characteristics in MSW components, generation quantity, influencing factors and disposal ways. Beijing, Guangzhou and Lhasa of Beijing-Tianjin-Hebei economic circle, Pearl River Delta economic zone, and Qinghai-Tibet plateau regions were selected as representative cities, to compare and analyze the features, influencing factors to the MSW generation quantities, and its components by grey correlation analysis. Predictions of MSW generation quantities for Beijing, Guangzhou and Lhasa in 2025 would be 1251.22, 704.71 and 71.040 million tons, respectively, made by BP (back propagation) nerve work using MATLAB software. Results showed that the main indicators of influencing factors to MSW in three cities were all of economic development levels, population and investments of government input. Based on the analysis of internal relationship and characteristics of MSW, some barriers of MSW management were analyzed, and recommendations were given. Our study analyzed the influencing factors and forecasted quantities of MSW generation in representative cities in China, providing valuable evidences for the severe MSW disposal situation of different economic zones in China.

    更新日期:2020-01-13
  • Quantification of renewable electricity generation in the Australian water industry
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    A. Strazzabosco; S.J. Kenway; P.A. Lant
    更新日期:2020-01-13
  • The Effect of Environmental Policy Tools on Regional Green Innovation: Evidence from China
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Chen Shen; Shenglan Li; Xiaopeng Wang; Zhongju Liao

    Environmental policy tools are an important means of improving environmental pollution and promoting regional green development. Working from a heterogeneous perspective, this study constructed a model using several different types of environmental policy tools and green innovation. Data from China's 30 provinces, spanning the period 1997 to 2014, was selected as the sample, and a multiple regression analysis and difference-in-differences model was used to analyze the data. The results showed that command-and-control type environmental policy tools had the most positive effect on innovations relating to end-of-pipe treatment and green products. By contrast, their effect on clean production technology lacked significance. Pollution charges played a positive role in promoting green process innovation, but a negative role in green product innovation. In addition, the overall effect of the emission trading mechanism was not significant. Despite this, the emission trading system that was independently implemented within some provinces was more successful than the system used within trial provinces that were identified and approved by the central government.

    更新日期:2020-01-13
  • Microscopic characterizations of pervious concrete using recycled Steel Slag Aggregate
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Xueqin Chen; Guotong Wang; Qiao Dong; Xiaokang Zhao; Yangyang Wang

    Pervious concrete using Steel Slag Aggregate (SSA) is a promising Low Impact Development (LID) and sustainable pavement material solution. This study investigated the enhancing mechanism using SSA instead of limestone in pervious concrete from the perspective of microscopic characterizations. Nanoindentation, Backscatter Electrons - Scanning Electron Microscope (BSE-SEM), and Energy Dispersive Spectroscopy (EDS) tests were conducted to obtain the micro-mechanical, micro-morphological and element composition of the interfacial transition zone (ITZ) and adjacent cement paste. The nanoindentation tests showed that the modulus and hardness of the ITZ in SSA pervious concrete were 44% and 68% higher than those of limestone concrete, and the contour plots showed that ITZ thickness of SSA pervious concrete was around 18 μm, narrower than the 25 μm thickness of limestone samples. The BSE-SEM tests showed that the ITZ of SSA pervious concrete had more hydration products and were more compacted. Specifically, denser flower-shape polyhedral crystals were observed, which was coalesced hydration products including calcium silica hydrates (CSH), calcium hydroxide (CH) and ettringite. The EDS results showed that not only were the contents of silicon and calcium in ITZ of SSA pervious concrete were higher, the silicon and calcium (S/C) ratio of SSA pervious concrete was also 42% higher, indicating that more CSH gel was formed. Based on the change of element composition, the estimated width of the ITZ in SSA pervious concrete was also smaller than that of the limestone sample. In all, the ITZ enhancing mechanism of using SSA includes improved strength, reduced width and densified structure.

    更新日期:2020-01-13
  • Environmental Impact Assessment of Fly Ash and Silica Fume Based Geopolymer Concrete
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Rishabh Bajpai; Kailash Choudhary; Anshuman Srivastava; Kuldip Singh Sangwan; Manpreet Singh

    Alkali activated geopolymer is an attractive solution to limit the adverse consequences of cement manufacturing. In this paper, an evaluation of environmental impacts of geopolymer containing fly ash and silica fume is conducted. Life cycle assessment is performed by benchmarking the environmental impacts of three geopolymer concrete mixes against the conventional cement concrete, namely: fly ash geopolymer (with hydroxide and silicate of sodium); fly ash–silica fume blend geopolymer (with hydroxide and silicate of sodium); and fly ash–silica fume blend geopolymer (with sodium hydroxide). Impact analysis is performed by using ReCiPe midpoint and endpoint methods in life cycle assessment software UMBERTO NXT using database of Ecoinvent 3.0. Sensitivity analysis is performed to determine the effect of transportation. One mix design for each concrete of equal water to binder ratio and 28-days compressive strength of more than 35 MPa is analyzed. Results of life cycle assessment indicate that alkaline activators and cement are the major sources of negative environmental impacts for geopolymer and cement concrete, respectively. Global warming potential of geopolymer concretes is lower than conventional cement concrete. Fly ash–silica fume geopolymer concrete activated without sodium silicate has lowest environmental impacts. Transportation of raw materials is found to increase the overall negative of all four concrete mixes. Cost reduction of 10.87% to 17.77% per unit volume is achieved with the use of fly ash – silica fume based geopolymer concrete. Sustainability in terms of cost and environmental benefits of geopolymer concrete can be further increased by using silica fume. It can be concluded that the use of fly ash – silica fume blended geopolymer in the construction industry has huge possibility to improve its sustainability. Furthermore, waste management can be effectively done by utilization of industrial by-products in concrete.

    更新日期:2020-01-13
  • Pricing for private charging pile sharing considering EV consumers based on non-cooperative game model
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Zhenli Zhao; Lihui Zhang; Meng Yang; Jianxue Chai; Songrui Li

    The supply of public charging infrastructure is insufficient to meet the charging demand of a large number of electric vehicles (EVs). Private charging pile sharing is an emerging solution to alleviate this imbalance. However, a reasonable price for charging pile sharing has not yet been determined. This study employs a non-cooperative game model to determine a charging pile sharing price considering EV consumers’ charging behaviors. First, a multi-logit model is constructed to measure the probability of EV consumers’ charging behavior choices. Then, a two-matrix game model is established between the private charging pile sharing and public charging mode. Using Beijing as a sample, the sharing rate and price strategies of private and public charging piles are calculated based on the proposed game model. The results show that the optimal sharing rate is 20.01% private charging pile sharing with 1.14 yuan/kWh and 79.99% public charging with 1.7946 yuan/kWh. Sensitivity analysis shows that economics is the most sensitive factor affecting the charging price of private charging pile sharing. Finally, policy recommendations are outlined to improve the private charging pile sharing rate and service efficiency, to broaden the charging options for EV consumers, reduce the construction of public charging piles, and save the government subsidy.

    更新日期:2020-01-13
  • Ionic liquid extractive distillation for the recovery of diisopropyl ether and isopropanol from industrial effluent: Experiment and simulation
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Jun Qi; Ruisong Zhu; Xiaoyan Han; Hongkang Zhao; Qunsheng Li; Zhigang Lei

    To recover diisopropyl ether (DIPE) and isopropyl alcohol (IPA) from industrial wastewater through extractive distillation (ED), the most suitable extrainer 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]) was screened out by comparing the selectivity of DIPE to IPA and IPA to water in ionic liquids (ILs) composed of 9 common cations and 12 common anions. Theoretical insight at the molecular level based on surface charge-density (σ-profiles) and excess enthalpy (HE) was provided to analyze the hydrogen bonding and separation mechanism between IL and the azeotrope. Isobaric vapor-liquid equilibrium (VLE) experiment of DIPE + IPA + [EMIM][OAc] and IPA + water + [EMIM][OAc] further validated the predicted results. After inputting the binary interaction parameters, the ternary ED configuration with [EMIM][OAc] as entrainer was simulated, and the thermal integration scheme was further explored. Comprehensive evaluation demonstrated that when compared to ethylene glycol (EG), the energy-integrated ED scheme with [EMIM][OAc] as entrainer saves energy consumption and the total annual cost (TAC) of 27.71% and 12.29%, respectively. This separation method provides a more energy-efficient and environmentally friendly choice for clean production of IPA.

    更新日期:2020-01-13
  • Wind Turbine Power Output Short-Term Forecast: A comparative study of data clustering techniques in a PSO-ANFIS model
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Paul A. Adedeji; Stephen Akinlabi; Nkosinathi Madushele; Obafemi O. Olatunji

    The emergence of new sites for wind energy exploration in South Africa requires an accurate prediction of the potential power output of a typical utility-scale wind turbine in such areas. However, careful selection of data clustering technique is very essential as it has a significant impact on the accuracy of the prediction. Adaptive neurofuzzy inference system (ANFIS), both in its standalone and hybrid form has been applied in offline and online forecast in wind energy studies, though the effect of clustering techniques has not been reported despite its significance. Therefore, this study investigates the effect of the choice of clustering algorithm on the performance of a standalone ANFIS and ANFIS optimized with particle swarm optimization (PSO) technique using a synthetic wind turbine power output data of a potential site in the Eastern Cape, South Africa. In this study a wind resource map for the Eastern Cape province was developed. Also, autoregressive ANFIS models and their hybrids with PSO were developed. Each model was evaluated based on three clustering techniques (grid partitioning (GP), subtractive clustering (SC), and fuzzy c-means (FCM)). The gross wind power of the model wind turbine was estimated from the wind speed data collected from the potential site at 10minutes data resolution using Windographer software. The standalone and hybrid models were trained and tested with 70 % and 30 % of the dataset respectively. The performance of each clustering technique was compared for both standalone and PSO-ANFIS models using known statistical metrics. From our findings, ANFIS standalone model clustered with SC performed best among the standalone models with a root mean square error (RMSE) of 0.132, mean absolute percentage error (MAPE) of 30.94, a mean absolute deviation (MAD) of 0.077, relative mean bias error (rMBE) of 0.190 and variance accounted for (VAF) of 94.307. Also, PSO-ANFIS model clustered with SC technique performed the best among the three hybrid models with RMSE of 0.127, MAPE of 28.11, MAD of 0.078, rMBE of 0.190 and VAF of 94.311. The ANFIS-SC model recorded the lowest computational time of 30.23secs among the standalone models. However, the PSO-ANFIS-SC model recorded a computational time of 47.21secs. Based on our findings, a hybrid ANFIS model gives better forecast accuracy compared to the standalone model, though with a trade-off in the computational time. Since, the choice of clustering technique was observed to plays a vital role in the forecast accuracy of standalone and hybrid models, this study recommends SC technique for ANFIS modeling at both standalone and hybrid models.

    更新日期:2020-01-13
  • 更新日期:2020-01-13
  • From Smart Energy Community to Smart Energy Municipalities: literature review, agendas and pathways
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    F. Ceglia; P. Esposito; E. Marrasso; M. Sasso

    The current energy and environmental target is the completely integration of the energy produced from different sources taking into account the renewables. The traditional power grids or thermal-cooling and heating conversion systems converge to the use of smart grids and to the planning of intelligent local organizations through energy integration techniques. This cannot be assessed as an isolated problem but an integrated one. The right construction of smart society is to match different challenges achieving sustainable energy systems not only from the point of view of energy consumption in different sectors (civil, industrial, agriculture, transport) and of the related of pollutants emissions, but considering simultaneously the relation with the socio-economic impact. The aim of this paper is firstly to examine the theories-approach to smart energy systems at the community level, the scientific literature of the smart energy community, the benefits of their potential applications in the smart energy municipalities. Finally, it manages the aspects related to smart energy community adoption with a multidisciplinary approach linking the technical conditions to the socio-economic systems of territorial planning. The main finding is that the concept of the intelligent energy community is strictly related to a coherent and intersectoral approach searching the best control strategy to satisfy all energy requirements. Moreover, the road leading to the smart energy community is essential to build the more sustainable renewable energy systems, to collect storage synergies between energy sub-sectors through the energy sharing and finally to exploit economically efficient sources.

    更新日期:2020-01-13
  • Influence of water body area on water quality in the southern Jiangsu Plain, eastern China
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Xiaojun Deng

    Water quality management remains a challenge due to the complex interactions between multiple influencing factors. Although the influences of land use/cover types on water quality have received extensive attention, few researchers have attempted to elucidate the correlation between water body characteristics and water quality, and the interactions between water bodies and other land use/cover types on water quality have been relatively less studied. In this study, the southern Jiangsu Plain, eastern China, was taken as a study area, and the influence of water body area on water quality was investigated. The results revealed that all land use/cover types exhibited correlations with water quality, but their correlative directions and significance levels exhibited larger differences. The influences of different water body types on water quality were discrepant, and these influences all had spatial non-stationarity. The interactions between urban and dry lands and water bodies on water quality were bidirectionally weakened, and there was an inverted U-shaped relationship between water body area and water quality. The water body area could predict whether the water quality reached the standard of Class Ⅲ, and the appropriate cut-off values of the water body, rivers, and lakes were 10.65%, 9.33%, and 2.38%, respectively. These results suggested that water body area had a positive influence on water quality, and the loss of water bodies caused by the expansion of urban and dry lands created a double whammy on water quality; finally, water body area could effectively predict whether water quality reached a certain standard. Thus, maintaining a reasonable water body area contributes to managing water quality, and the proportion of water bodies can be a useful index for water quality management in downstream regions with dense river networks.

    更新日期:2020-01-13
  • Experimental evidence for the effects of emissions charges and efficiency information on consumer car choices
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Áine Ní Choisdealbha; Shane Timmons; Peter D. Lunn

    A consumer purchasing a car can benefit the environment by choosing a vehicle with lower emissions and higher fuel efficiency. In addition to emissions of CO2, Nitrogen oxide (NOx) emissions have serious implications for the environment and public health. Working with a national environmental protection agency, we conducted a consumer choice experiment with a representative sample (N = 95) of consumers. We tested whether choices were altered by (i) the introduction and presentation of a NOx tax and (ii) the presentation of fuel efficiency information. The results show that a NOx tax has the potential to shift consumer choices towards lower NOx-emitting vehicles, particularly if the tax is made salient. We extend previous research on partitioned prices by finding an effect of partitioning environmental taxes, although the largest impact on choices occurred when the amount of pollutant was made explicit. Consumers were more likely to choose fuel efficient cars when running costs were communicated as travel units per fixed cost of fuel than as cost of fuel per fixed unit of travel, though a manipulation of unit size had no effect. Overall, these findings imply that financial incentives and subtle presentational changes can alter consumer choices, with the potential to promote sustainable consumption.

    更新日期:2020-01-13
  • EVALUATION OF BIOENERGY POTENTIAL FROM CITRUS EFFLUENTS THROUGH ANAEROBIC DIGESTION
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    E.S. Rosas-Mendoza; J.M. Méndez-Contreras; A.A. Aguilar-Laserre; N.A. Vallejo-Cantú; A. Alvarado-Lassman
    更新日期:2020-01-13
  • Flare Minimization for An Olefin Plant Shutdown via Plant-wide Dynamic Simulation
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Yiling Xu; Ha Dinh; Qiang Xu; Fadwa T. Eljack; Mahmoud M. El-Halwagi

    During shutdown operations of chemical plants, significant amounts of raw materials, intermediates, and products may be flared leading to economic losses and emissions such as carbon dioxide, nitrogen oxides, and volatile organic compounds. Thus, flare minimization during plant shutdown is a desirable goal towards economic benefit and environmental sustainability. In this paper, a systematic flare minimization methodology for an olefin plant shutdown operation has been developed. It includes three iterative stages: (i) steady-state modeling and validation to build the foundation of the dynamic modeling; (ii) dynamic modeling and validation to enable plant-wide simulations under designated plant control strategies; and (iii) plant shutdown simulation and optimization to iteratively examine, validate, quantify various flare minimization opportunities so as to identify the improved shutdown strategy. Particularly, dynamic performances of the critical equipment (e.g., the cracked gas compressor) has been thoroughly investigated to ensure the operating safety associated with the developed new shutdown strategy. Compared with the conventional plant shutdown strategy, the case study has shown that the new development can significantly reduce flared raw materials and emissions by 90.23%, which result in estimated economic savings by 91.03% and the social cost of carbon saving by 90.37%.

    更新日期:2020-01-13
  • Mechanical properties, durability and environmental evaluation of rubberized concrete incorporating steel fiber and metakaolin at elevated temperatures
    J. Clean. Prod. (IF 6.395) Pub Date : 2020-01-13
    Sadegh Mehdipour; Iman.M. Nikbin; Soudabeh Dezhampanah; Reza Mohebbi; HamidHabibi Moghadam; Shahin Charkhtab; Abolhasan Moradi

    In this study, the effects of metakaolin (MK), as a replacement for the Portland cement, in the ratios of 0%, 10% and 20% by cement weight and steel fiber (SF) dosages of 0%, 0.25%, 0.5%, and 1% by concrete volume were investigated on the microstructure, mechanical properties, durability and global warming potential (GWP) of concrete containing 25% volume percentage of crumb rubber replaced with natural fine aggregates at elevated temperatures. Several specimens were exposed to the high temperatures of 150, 300, 450 and 600 °C for an hour, and were then compared in terms of mass loss, compressive strength, ultrasonic pulse velocity (UPV), splitting tensile strength (STS), and impact resistance at the ambient temperature. The role of MK and SF on the concrete microstructure at high temperatures was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The results show that not only does the combination of MK and SF improve the mechanical properties and durability of rubberized concrete at high temperatures, but it can also introduce more environmentally friendly mixes by reducing CO2 emissions, compared to a plain concrete mix.

    更新日期:2020-01-13
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