当前期刊: "环境综合"类期刊
显示样式:        排序: 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Kolochilikélan: A digital opportunity for Malian emptying operators to boost their business
    Environ. Sci. Policy (IF 4.816) Pub Date : 2020-01-23
    Fabrizio de Georgio Ferrari Trecate; Céline Jacmain; Harald van der Hoek

    In Bamako District, capital of Mali with 2.2 million inhabitants, 98.5 % of the population resorts to autonomous sanitation. This results in a considerable production of fecal sludge, accounting for more than 600,000 m³/year. This article shows how a smartphone application can support and facilitate the management of emptying services. It is based on the experience of Join For Water & PRACTICA who have designed a smartphone application, called ‘Kolochilikélan’ which in Bambara means ‘the controller’, to allow all partner emptying operators to monitor and control their activities.

    更新日期:2020-01-23
  • Predictors of urinary and blood Metal(loid) concentrations among pregnant women in Northern Puerto Rico
    Environ. Res. (IF 5.026) Pub Date : 2020-01-23
    Pahriya Ashrap; Deborah J. Watkins; Bhramar Mukherjee; Jonathan Boss; Michael J. Richards; Zaira Rosario; Carmen M. Vélez-Vega; Akram Alshawabkeh; José F. Cordero; John D. Meeker

    Given the potential adverse health effects related to toxic trace metal exposure and insufficient or excessive levels of essential trace metals in pregnant women and their fetuses, the present study characterizes biomarkers of metal and metalloid exposure at repeated time points during pregnancy among women in Puerto Rico. We recruited 1040 pregnant women from prenatal clinics and collected urine, blood, and questionnaire data on demographics, product use, food consumption, and water usage at up to three visits. All samples were analyzed for 16 metal(loid)s: arsenic (As), barium (Ba), beryllium (Be), cadmium (Cd), cobalt (Co), chromium (Cr), cesium (Cs), copper (Cu), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), titanium (Ti), uranium (U), vanadium (V), and zinc (Zn). Urine samples were additionally analyzed for molybdenum (Mo), platinum (Pt), antimony (Sb), tin (Sn), and tungsten (W). Mean concentrations of most metal(loid)s were higher among participants compared to the general US female population. We found weak to moderate correlations for inter-matrix comparisons, and moderate to strong correlations between several metal(loid)s measured within each biological matrix. Blood concentrations of Cu, Zn, Mn, Hg, and Pb, and urinary concentrations of As, Ni, and Co, were shown to reflect reliable biomarkers of exposure. For other metals, repeated samples are recommended for exposure assessment in epidemiology studies. Predictors of metal(loid) biomarkers included fish and rice consumption (urinary As), fish and canned food (blood Hg), drinking public water (blood Pb), smoking (blood Cd), and iron/folic acid supplement use (urinary Cs, Mo, and Sb). Characterization of metal(loid) biomarker variation over time and between matrices, and identification of important exposure sources, may inform future epidemiology studies and exposure reduction strategies.

    更新日期:2020-01-23
  • Environmental performance of an industrial biofilter: Relationship between photochemical oxidation and odorous impacts
    Environ. Res. (IF 5.026) Pub Date : 2020-01-23
    J. Reyes; M.C. Gutiérrez; M. Toledo; L. Vera; L. Sánchez; J.A. Siles; M.A. Martín
    更新日期:2020-01-23
  • Towards a risk evaluation of workers’ exposure to handborne and airborne microbial species as exemplified with waste collection workers
    Environ. Res. (IF 5.026) Pub Date : 2020-01-23
    Anne Mette Madsen; Margit W. Frederiksen; Mikkel Hyldeqvist Jacobsen; Kira Tendal

    Bioaerosol exposure is associated with health problems. The aim of this study is to evaluate whether it is possible to assess the risks posed by waste collection workers' exposure through identification and characterization of bacterial and fungal species, to which the workers are exposed. Using MALDI-TOF MS, microorganisms in waste collection workers' exposure through air, hand, and contact with the steering wheel were identified. Fungi found in high concentrations from the workers' exposure were characterized for the total inflammatory potential (TIP), cytotoxicity, and biofilm-forming capacity. In total, 180 different bacterial and 37 different fungal species in the workers' exposure samples were identified. Some of them belong to Risk Group 2, e.g. Escherichia coli, Klebsiella oxytoca, Staphylococcus aureus, and Aspergillus fumigatus, some have been associated with occupational health problems e.g. Penicillium citrinum and P. glabrum and some are described as emerging pathogens e.g. Aureobasidium pullulans. The TIP of fungal species was dose-dependent. High TIP values were found for Penicillium italicum, P. brevicompactum, P. citrinum, and P. glabrum. Several species were cytotoxic, e.g. A. niger and P. expansum, while some, e.g. P. chrysogenum, did not affect the cell viability. Based on waste workers’ average inhalation rate, they inhaled up to 2.3 × 104 cfu of A. niger, 7.4 × 104 cfu of P. expansum, and 4.0 × 106 cfu of P. italicum per work day. Some species e.g. A. niger and P. citrinum were able to form biofilm. In conclusion, the workers were exposed to several species of microorganisms of which some to varying degrees can be evaluated concerning risk. Thus, some microorganisms belong to Risk Group 2, and some are described as causing agents of occupational health problems, emerging pathogens, or intrinsically antibiotic resistant. For some other species very little is known. The TIP, cytotoxicity, and ability to form biofilm of the dominating fungi support and expand previous findings. These parameters depended on the species and the dose, thus highlighting the importance of species identification and exposure level in the risk assessment of exposure.

    更新日期:2020-01-23
  • Effects of cold recovery technology on the microbial drinking water quality in unchlorinated distribution systems
    Environ. Res. (IF 5.026) Pub Date : 2020-01-23
    Jawairia Imtiaz Ahmad; Gang Liu; Paul W.J.J. van der Wielen; Gertjan Medema; Jan Peter van der Hoek

    Drinking water distribution systems (DWDSs) are used to supply hygienically safe and biologically stable water for human consumption. The potential of thermal energy recovery from drinking water has been explored recently to provide cooling for buildings. Yet, the effects of increased water temperature induced by this “cold recovery” on the water quality in DWDSs are not known. The objective of this study was to investigate the impact of cold recovery from DWDSs on the microbiological quality of drinking water. For this purpose, three pilot distribution systems were operated in parallel for 38 weeks. System 1 has an operational heat exchanger, mimicking the cold recovery system by maintaining the water temperature at 25 °C; system 2 operated with a non-operational heat exchanger and system 3 run without heat exchanger. The results showed no significant effects on drinking water quality: cell numbers and ATP concentrations remained around 3.5 × 105 cells/ml and 4 ng ATP/l, comparable observed operational taxonomic units (OTUs) (∼470–490) and similar Shannon indices (7.7–8.9). In the system with cold recovery, a higher relative abundance of Pseudomonas spp. and Chryseobacterium spp. was observed in the drinking water microbial community, but only when the cold recovery induced temperature difference (ΔT) was higher than 9 °C. In the 38 weeks’ old biofilm, higher ATP concentration (475 vs. 89 pg/cm2), lower diversity (observed OTUs: 88 vs. ≥200) and a different bacterial community composition (e.g. higher relative abundance of Novosphingobium spp.) were detected, which did not influence water quality. No impacts were observed for the selected opportunisitic pathogens after introducing cold recovery. It is concluded that cold recovery does not affect bacterial water quality. Further investigation for a longer period is commended to understand the dynamic responses of biofilm to the increased temperature caused by cold recovery.

    更新日期:2020-01-23
  • Pre-concentration of rosuvastatin using solid-phase extraction in a molecularly imprinted polymer and analytical application in water supply
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Wanderson A. da Silva, Fernanda N. Feiteira, Janaína E. Francisco, Carlos A. T. Toloza, Ricardo Q. Aucélio, Wagner F. Pacheco

    Abstract In this work, it is shown the development and validation of innovative analytical methodology based on solid-phase extraction (SPE) with molecularly imprinted polymers (MIP) as a sorbent associated to UV–Vis spectroscopy to isolate and quantify, respectively, rosuvastatin (RSV) in water samples. For this purpose, porogenic solvent in MIP synthesis and SPE extraction parameters for MIP and non-imprinted polymers (NIP) were evaluated univariately for comparison purposes. The sorptive capacity and characterization studies by infrared spectroscopy and atomic force microscopy showed difference between MIP and NIP. The selectivity study of the MIP–RSV against other statins (simvastatin and atorvastatin) showed that the synthesized MIP can also be applied as a solid phase for isolation and quantitative pre-concentration of RSV and atorvastatin. The conjugation of SPE and UV–Vis spectroscopy in the determination of RSV in aqueous matrices led to large factor of pre-concentration (125 times), limit of detection (LOD) of 3 μg L−1, limit of quantification (LOQ) of 10 μg L−1, precision of 2.87% (n = 10), and accuracy of 83.1% (n = 4).

    更新日期:2020-01-23
  • Preparation of ternary amino-functionalized magnetic nano-sized illite-smectite clay for adsorption of Pb(II) ions in aqueous solution
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Zhenyuan Li, Zhidong Pan, Yanmin Wang

    Abstract Ternary amino-functionalized magnetic illite-smectite (AMNI/S) nanocomposites were prepared via integrating two-dimensional illite-smectite nanoflakes (NI/S), magnetite nanoparticles (Fe3O4), and 3-aminopropyltriethoxysilane (APTES). The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and vibrating sample magnetometry (VSM). The results show that Fe3O4 nanoparticles can be well dispersed on NI/S flakes and the hydrolyzed APTES molecules can simultaneously bond to the hydroxyl groups of Fe3O4 and NI/S. Due to the synergetic effect, magnetic NI/S composite can graft more amount of APTES molecules rather than Fe3O4 nanoparticles or NI/S alone. When the mass ratio of NI/S:Fe3O4 is 1:1, the saturation magnetization of AMNI/S-1 is 17.4 emu/g, facilitating the efficient magnetic separation in aqueous solution. Also, AMNI/S-1 shows a maximal adsorption amount of Pb(II) ions of 227.8 mg/g calculated by the Langmuir model. The effects of initial concentration of Pb(II) ions, pH value, adsorption time, and temperature on the adsorption amount of Pb(II) ions were investigated. The adsorption kinetic models and isotherm models were applied to analyze the adsorption of Pb(II) ions, respectively. The thermodynamic analysis reveals that the adsorption of Pb(II) onto AMNI/S-1 is spontaneous and endothermic in nature. The mechanism for the adsorption of Pb(II) ions onto AMNI/S-1 is due to the surface complexation of Fe3O4 and NI/S, and the chelation of amine groups (–NH2). AMNI/S-1 can be efficiently reused and the regenerated AMNI/S-1 remains 82.91% of initial adsorption capacity after 6-cycle adsorption/desorption process. Thus, ternary AMNI/S-1 could be used as a prospective effective adsorbent.

    更新日期:2020-01-23
  • Reduction of chlordecone environmental availability by soil amendment of biochars and activated carbons from lignocellulosic biomass
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Ronald Ranguin, Corine Jean-Marius, Christelle Yacou, Sarra Gaspard, Cyril Feidt, Guido Rychen, Matthieu Delannoy

    Abstract Chlordecone (kepone or CLD) was formerly used in French West Indies as an insecticide. Despite its formal ban in 1993, high levels of this pesticide are still found in soils. As such, sequestering matrices like biochars or activated carbons (ACs) may successfully decrease the bioavailability of halogenated compounds like CLD when added to contaminated soils. The present study intends (i) to produce contrasted sequestering matrices in order to (ii) assess their respective efficiency to reduce CLD environmental availability. Hence, the work was designed following two experimental steps. The first one consisted at producing different sequestering media (biochars and ACs) via pyrolysis and distinct activation processes, using two lignocellulosic precursors (raw biomass): oak wood (Quercus ilex) and coconut shell (Cocos nucifera). The chemical activation was carried out with phosphoric acid while physical activation was done with carbon dioxide and steam. In the second step, the CLD environmental availability was assessed either in an OECD artificial soil or in an Antillean contaminated nitisol (i.e., 2.1-1μg CLD per g of soil dry matter, DM), both amended with 5 wt% of biochar or 5 wt% of AC. These both steps aim to determine CLD environmental availability reduction efficiency of these media when added (i) to a standard soil material or (ii) to a soil representative of the Antillean CLD contamination context. Textural characteristics of the derived coconut and oak biochars and ACs were determined by nitrogen adsorption at 77 K. Mixed microporous and mesoporous textures consisting of high pore volume (ranging from 0.38 cm3.g−1 to 2.00 cm3.g−1) and specific (BET) surface areas from 299.9 m2.g−1 to 1285.1 m2.g−1 were obtained. Overall, soil amendment with biochars did not limit CLD environmental availability (environmental availability assay ISO/DIS 16751 Part B). When soil was amended with ACs, a significant reduction of the environmental availability in both artificial and natural soils was observed. AC soil amendment resulted in a reduced CLD transfer by at least 65% (P < 0.001) for all lignocellulosic matrices (excepted for coconut sample activated with steam, which displayed a 47% reduction). These features confirm that both pore structure and extent of porosity are of particular importance in the retention process of CLD in aged soil. Owing to its adsorptive properties, AC amendment of CLD-contaminated soils appears as a promising approach to reduce the pollutant transfer to fauna and biota.

    更新日期:2020-01-23
  • Enhancement of CO 2 adsorption on biochar sorbent modified by metal incorporation
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Nurul Azrin Zubbri, Abdul Rahman Mohamed, Naoto Kamiuchi, Maedeh Mohammadi

    Abstract This work is scrutinizing the development of metallized biochar as a low-cost bio-sorbent for low temperature CO2 capture with high adsorption capacity. Accordingly, single-step pyrolysis process was carried out in order to synthesize biochar from rambutan peel (RP) at different temperatures. The biochar product was then subjected to wet impregnation with several magnesium salts including magnesium nitrate, magnesium sulphate, magnesium chloride and magnesium acetate which then subsequently heat-treated with N2. The impregnation of magnesium into the biochar structure improved the CO2 capture performance in the sequence of magnesium nitrate > magnesium sulphate > magnesium chloride > magnesium acetate. There is an enhancement in CO2 adsorption capacity of metallized biochar (76.80 mg g−1) compare with pristine biochar (68.74 mg g−1). It can be justified by the synergetic influences of physicochemical characteristics. Gas selectivity study verified the high affinity of biochar for CO2 capture compared with other gases such as air, methane, and nitrogen. This investigation also revealed a stable performance of the metallized biochar in 25 cycles of CO2 adsorption and desorption. Avrami kinetic model accurately predicted the dynamic CO2 adsorption performance for pristine and metallized biochar.

    更新日期:2020-01-23
  • A beneficial role of arbuscular mycorrhizal fungi in influencing the effects of silver nanoparticles on plant-microbe systems in a soil matrix
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Jiling Cao, Youzhi Feng, Xiangui Lin, Junhua Wang

    Abstract Silver nanoparticles (AgNPs) are considered to be emerging contaminant for plant-soil systems. AM arbuscular mycorrhizal (AM) fungi can alleviate the negative effects of a variety of pollutants on their hosts, but its potential roles in influencing the toxicity of AgNPs and the underlying mechanisms are still an open question. This study investigated the responses of maize (Zea mays L.) inoculated with or without AM fungi and soil microorganisms to different concentrations of AgNPs (0, 0.025, 0.25, and 2.5 mg kg−1). The inoculation of AM fungi helps to alleviate the AgNP-induced phytotoxicity. Compared to the non-AM fungal inoculated treatments, AM fungal inoculation significantly increased the mycorrhizal colonization, biomass and phosphorus (P) acquisitions of maize, with an upregulation of P transporter gene expression under AgNP treatments. AM fungal inoculation decreased Ag content in plant shoots and roots, downregulated expression levels of genes involved in Ag transport and gene encoding a metallothionein involved in metal homeostasis. The beneficial role of AM fungi extended to soil microbes. Compared to the non-AM fungal inoculated treatments, AM fungal inoculation decreased the toxicity of AgNPs to soil microbial activities and bacterial abundance. AM fungal inoculation increased the bacterial diversity and induced changes in the soil bacterial community composition. Altogether, the present study revealed that AM fungal symbiosis can play beneficial roles in mediating the negative effects exposed by AgNPs on plants probably through changing the expressions of potential Ag transporters and cooperating with soil bacterial community.

    更新日期:2020-01-23
  • Bioaccessibility and health risk assessment of Pb and Cd in urban dust in Hangzhou, China
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 

    Abstract Heavy metals in urban dust can enter the human body through a variety of ways, thus endangering human health. Understanding the bioaccessibility of heavy metals in urban dust is a key to its risk assessment. After the G20 summit in 2016, Hangzhou city has received much attention, including its environmental health risk. The surface dust collected from three different functional areas in Hangzhou were subjected to the in vitro physiologically based extraction test (PBET) to measure the bioaccessibility of Pb and Cd. In terms of spatial variation, the distribution of Pb bioaccessibility was in the order of residential areas > city parks > main roads > the Botanic Garden, while for Cd ordered in city parks > residential areas > main roads > the Botanic Garden. For temporal variation, the bioaccessibility of Pb was higher in autumn and winter, and the bioaccessibility of Cd was higher in spring and autumn. Based on multiple linear statistical analysis, the relationship between the spatial and temporal distribution differences of the bioaccessibility of Pb and Cd in the city and the main components was discussed. Meanwhile, the non-carcinogenic hazard quotients of Pb and the carcinogenic risk of Cd were calculated and showed no harm to human health, except the total Pb in the surface dust with a high non-carcinogenic risk for infants. Urban dust in Hangzhou city has a slight pollution and health risk from Pb. Currently, controlling and reducing the city’s Pb emission is the key to maintain Hangzhou city’s air quality and matching with its international tourism city.

    更新日期:2020-01-23
  • Asymmetric impact of energy consumption on environmental degradation: evidence from Australia, China, and USA
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-23
    Kashif Munir, Nimra Riaz

    Abstract The goal of this study is to examine the asymmetric impact of disaggregate energy consumption, i.e., oil, gas, coal, and electricity consumption on environmental degradation in Australia, China, and USA. The study uses annual time series data of three courtiers, i.e., Australia, China, and USA from 1975 to 2018 and applies nonlinear ARDL (NARDL) model to examine the long run and short run relationship. Results show that an increase in oil and coal consumption in Australia; oil, gas, and electricity consumption in China; and oil, coal, and gas consumption in USA leads to increase in the carbon dioxide emissions in the long run. However, a decrease in oil, gas, and electricity consumption in Australia; oil and electricity consumption in China; and coal, gas, and electricity consumption in USA reduces carbon dioxide emissions in the long run. Research and development centers are required to control pollution through new technologies, while to reduce emissions use renewable energy resources as a source of energy.

    更新日期:2020-01-23
  • Preparation and uranium (VI) biosorption for tri-amidoxime modified marine fungus material
    Environ. Sci. Pollut. Res. (IF 2.914) Pub Date : 2020-01-22
    Jingwen Han, Lin Hu, Leqing He, Kang Ji, Yaqing Liu, Can Chen, Xiaomei Luo, Ni Tan

    Abstract The preparation, characterization, and uranium (VI) adsorption properties of tri-amidoxime modified marine fungus material (ZZF51-GPTS-EDA-AM/ZGEA) were investigated in this study. ZGEA was synthesized by four steps of condensation, nucleophilic substitution, electrophilic addition, and nitrile amidoxime and characterized by a series of methods containing FT-IR, TGA, SEM, and BET. Contrasted with uranium (VI) adsorption capacity of original fungus mycelium (15.46 mg g−1) that of the functional material (584.60 mg g−1) was great under the optimal factors such as uranium (VI) ion concentration 40 mg L−1, solid-liquid ratio 50 mg L−1, pH of solution 5.5, and reaction time 120 min. The above data were obtained by the orthogonal method. The cyclic tests showed that ZGEA had good regeneration performance, and it could be recycled at least five adsorption-desorption processes. The thermodynamic experimental adsorption result fitted Langmuir and Freundlich models, which explored monolayer and double layers of uranium (VI) adsorption mechanism, and the kinetic adsorption results were in better consistent with the pseudo-second-order and pseudo-first-order dynamic models (R2 > 0.999).

    更新日期:2020-01-23
  • Artisanal and small-scale gold mining, meandering tropical rivers, and geological heritage: Evidence from Brazil and Indonesia
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    Delia E. Bruno; Dmitry A. Ruban; Günter Tiess; Nicola Pirrone; Piero Perrotta; Anna V. Mikhailenko; Vladimir A. Ermolaev; Natalia N. Yashalova
    更新日期:2020-01-23
  • Bioconversion of citrus peel wastes into bioflocculants and their application in the removal of microcystins
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    Xiaoli Qi; Yongliang Zheng; Ningjia Tang; Jiangang Zhou; Su Sun
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Towards an Ecosystem-Based Marine Spatial Planning in the deep Mediterranean Sea
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    E. Manea; S. Bianchelli; E. Fanelli; R. Danovaro; E. Gissi
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Removal of aqueous-phase lead ions by dithiocarbamate-modified hydrochar
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    Bing Li; Jian-Zhong Guo; Jia-Lin Liu; Ling Fang; Jian-Quan Lv; Kangle Lv
    更新日期:2020-01-23
  • NaOH-induced formation of 3D flower-sphere BiOBr/Bi4O5Br2 with proper-oxygen vacancies via in-situ self-template phase transformation method for antibiotic photodegradation
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    Panjie Li; Wang Cao; Yu Zhu; Qiuyi Teng; Lu Peng; Caiyun Jiang; Changsheng Feng; Yuping Wang
    更新日期:2020-01-23
  • Hydrogen fluoride concentrations in ambient air of an urban area based on the emissions of a major phosphogypsum deposit (SW, Europe)
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    R. Torres-Sánchez; D. Sánchez-Rodas; A.M. Sánchez de la Campa; J.D. de la Rosa
    更新日期:2020-01-23
  • Performance of heat-health warning systems in Shanghai evaluated by using local heat-related illness data
    Sci. Total Environ. (IF 5.589) Pub Date : 2020-01-23
    Yaqiao Wu; Xiaoye Wang; Jingyan Wu; Rui Wang; Saini Yang
    更新日期:2020-01-23
  • Sediment record of polycyclic aromatic hydrocarbons in Dianchi lake, southwest China: Influence of energy structure changes and economic development
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Xiaohua Ma; Hongbin Wan; Juan Zhou; Duan Luo; Tao Huang; Hao Yang; Changchun Huang
    更新日期:2020-01-23
  • Are free radicals actually responsible for enhanced oxidation of contaminants by Cr(VI) in the presence of bisulfite?
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Yuan Gao; Han-Ping Pan; Yang Zhou; Zhen Wang; Su-Yan Pang; Chao-Ting Guan; Yong-Ming Shen; Jin Jiang
    更新日期:2020-01-23
  • Mercury in Fish Marketed in The Amazon Triple Frontier and Health Risk Assessment
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Stephani Ferreira da Silva; Marcelo de Oliveira Lima

    Fish has great socioeconomic, cultural, and nutritional importance for Amazonian populations. Despite all health benefits, fish can accumulate great amounts of mercury (Hg). The entry of Hg in aquatic trophic chains is an issue of concern to animal and human health. Higher risks of human exposure are strongly related to fish consumption. Upper Solimões population has one of the highest fish consumption rates of the Amazon. This study aimed to access the concentration of total Hg (THg) in muscle, liver, and gills of 17 species of fishes marketed in the Upper Solimões Region and Health Risk Assessment. Higher concentrations were observed in Carnivores/Piscivores. The highest THg concentration was found in liver of Cichla ocellaris (4.549 μg/g) and the lowest in gills of Hoplosternum littorale (0.002 μg/g). Most species had higher THg concentrations in muscle>liver>gills, in the Ebb period, and liver>muscle>gills, in the Flood period. Hoplias malabaricus, Pseudoplatystoma fasciatum, Plagioscion squamosissimus, Ageneiosus inermis, and C. ocellaris presented average THg concentrations above the safe limit stablished by WHO. THg levels in C. ocellaris, H. malabaricus, P. squamosissimus, P. fasciatum, and Semaprochilodus insignis were higher than those found in fish of heavily impacted areas. Signs of bioaccumulation and biomagnifications of Hg can already be observed in this region. The Western Amazon Region urgently needs government actions to inhibit Hg release in aquatic ecosystems and to advise this population on the safe amount of fish to be eaten according to species and period of the year.

    更新日期:2020-01-23
  • Sandalwood-derived carbon quantum dots as bioimaging tools to investigate the toxicological effects of malachite green in model organisms
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Devyani Shukla; Megha Das; Dipanshu Kasade; Maneesha Pandey; Ashutosh Kumar Dubey; Sanjeev Kumar Yadav; Avanish Singh Parmar
    更新日期:2020-01-23
  • Effects of different routes of exposure to metals on bioaccumulation and population growth of the cyclopoid copepod Paracyclopina nana
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Paul Dayras; Capucine Bialais; Baghdad Ouddane; Jae-Seong Lee; Sami Souissi
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Impact of origin and structure on the aggregation behavior of natural organic matter
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Peiyun Wei; Fanchao Xu; Heyun Fu; Xiaolei Qu
    更新日期:2020-01-23
  • Can high rate algal ponds be used as post-treatment of UASB reactors to remove micropollutants?
    Chemosphere (IF 5.108) Pub Date : 2020-01-23
    Lucas Vassalle; María Jesús García-Galán; Sérgio F. Aquino; Robson José de Cássia Franco Afonso; Ivet Ferrer; Fabiana Passos; Cesar Rossas Mota Filho
    更新日期:2020-01-23
  • Mechanical Exfoliation of Boron Carbide: A Metal-free Catalyst for Aerobic Oxidative Desulfurization in Fuel
    J. Hazard. Mater. (IF 7.650) Pub Date : 2020-01-23
    Peiwen Wu; Qingdong Jia; Jing He; Linjie Lu; Linlin Chen; Jie Zhu; Chong Peng; Minqiang He; Jun Xiong; Wenshuai Zhu; Huaming Li
    更新日期:2020-01-23
  • Changes in microbial community structure during pig manure composting and its relationship to the fates of antibiotics and antibiotic resistance genes
    J. Hazard. Mater. (IF 7.650) Pub Date : 2020-01-23
    Yuanwang Liu; Dengmiao Cheng; Jianming Xue; Louise Weaver; Steve A. Wakelin; Yao Feng; Zhaojun Li
    更新日期:2020-01-23
  • Kinetics and mechanism of thiamethoxam abatement by ozonation and ozone-based advanced oxidation processes
    J. Hazard. Mater. (IF 7.650) Pub Date : 2020-01-23
    Huijiao Wang; Juhong Zhan; Lingwei Gao; Gang Yu; Sridhar Komarneni; Yujue Wang
    更新日期:2020-01-23
  • Molten salt induced nitrogen-doped biochar nanosheets as highly efficient peroxymonosulfate catalyst for organic pollutant degradation
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Yi Xie; Wanrong Hu; Xuqian Wang; Wenhua Tong; Panyu Li; Hui Zhou; Yabo Wang; Yongkui Zhang
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Acropetal translocation of phenanthrene in wheat seedlings: Xylem or phloem pathway?
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Yu Shen; Ruochen Gu; Yu Sheng; Nengde Zeng; Xinhua Zhan
    更新日期:2020-01-23
  • Consecutive ultrafiltration and silica adsorption for recovery of extracellular antibiotic resistance genes from an urban river
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Miaomiao Liu; Akihiko Hata; Hiroyuki Katayama; Ikuro Kasuga
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Extracellular Polymeric Substance from Rahnella sp. LRP3 converts available Cu into Cu5(PO4)2(OH)4 in soil through biomineralization process
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Hoaithuong Do; Chi Che; Mingtang Li; Zijun Zhao; Yuqi Wang; Xiufang Zhang; Xingmin Zhao
    更新日期:2020-01-23
  • Isolation, characterization and inoculation of Cd tolerant rice endophytes and their impacts on rice under Cd contaminated environment.
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Jieyi Zhou; Peng Li; Delong Meng; Yabing Gu; Zhongyi Zheng; Huaqun Yin; Qingming Zhou; Juan Li
    更新日期:2020-01-23
  • Polyvinylpyrolidone-functionalized silver nanoparticles do not affect aerobic performance or fractional rates of protein synthesis in rainbow trout (Oncorhynchus mykiss)
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    K.M. Ollerhead; O.A. Adams; N.J. Willett; M.A. Gates; J.C. Bennett; J. Murimboh; A.J. Morash; S.G. Lamarre; T.J. MacCormack
    更新日期:2020-01-23
  • Interactive effects of earthworm Eisenia fetida and bean plant Phaseolus vulgaris L on the fate of soil selenium
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Azhar-u-ddin; Jung-Chen Huang; Xinyu Gan; Shengbing He; Weili Zhou
    更新日期:2020-01-23
  • The mechanism for inhibiting acidification of variable charge soils by adhered Pseudomonas fluorescens
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Jackson Nkoh Nkoh; Jing Yan; Ren-Kou Xu; Ren-yong Shi; Zhi-neng Hong
    更新日期:2020-01-23
  • Opposite effects of the earthworm Eisenia fetida on the bioavailability of Zn in soils amended with ZnO and ZnS nanoparticles
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Shaopan Bao; Manqi Huang; Wei Tang; Tao Wang; Jian Xu; Tao Fang
    更新日期:2020-01-23
  • 更新日期:2020-01-23
  • Health risk assessment of metal(loid)s in soil and particulate matter from industrialized regions: A multidisciplinary approach
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Anna Francová; Vladislav Chrastný; Martina Vítková; Hana Šillerová; Michael Komárek
    更新日期:2020-01-23
  • Serum concentrations of persistent organic pollutants and the metabolic syndrome in Akwesasne Mohawks, a Native American community
    Environ. Pollut. (IF 5.714) Pub Date : 2020-01-23
    Zafar Aminov; David O. Carpenter

    The metabolic syndrome (MetS) is a group of diseases that tend to occur together, including diabetes, hypertension, central obesity, cardiovascular disease and hyperlipidemia. Exposure to persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) has been associated with increased risk of development of several of the components of the MetS. The goal of this study is to determine whether the associations with POPs are identical for each of the components and for the MetS. The subject population was 601 Native Americans (Akwesasne Mohawks) ages 18 to 84 who answered a questionnaire, were measured for height and weight and provided blood samples for clinical chemistries (serum lipids and fasting glucose) and analysis of 101 PCB congeners and three OCPs [dichlorodiphenyldichloroethylene (DDE), hexachlorobenzene (HCB) and mirex]. Associations between concentrations of total PCBs and pesticides, as well as various PCB congener groups with each of the different components of the MetS were determine so as to ask whether there were similar risk factors for all components of the MetS. After adjustment for other contaminants, diabetes and hypertension were strongly associated with lower chlorinated and mono-ortho PCBs, but not other PCB groups or pesticides. Obesity was most closely associated with highly chlorinated PCBs and was negatively associated with mirex. High serum lipids were most strongly associated with higher chlorinated PCBs and PCBs with multiple ortho-substituted chlorines, as well as total pesticides, DDE and HCB. Cardiovascular disease was not closely associated with levels of any of the measured POPs. While exposure to POPs is associated with increased risk of most of the various diseases comprising the MetS, the specific contaminants associated with risk of the component diseases are not the same.

    更新日期:2020-01-23
  • Short-Term Iodine Dynamics in Soil Solution
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Olivier S. Humphrey; Scott D. Young; Neil M. J. Crout; Elizabeth H. Bailey; E. Louise Ander; Michael J. Watts
    更新日期:2020-01-23
  • Freezing-Induced Bromate Reduction by Dissolved Organic Matter and the Formation of Organobromine Compounds
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Zhineng Hao; Fengqiong Shi; Dong Cao; Jingfu Liu; Guibin Jiang
    更新日期:2020-01-23
  • Integrating exposure knowledge and serum suspect screening as a new approach to biomonitoring: An application in firefighters and office workers
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Rachel Grashow; Vincent Bessonneau; Roy R. Gerona; Aolin Wang; Jessica Trowbridge; Thomas Lin; Heather Buren; Ruthann A Rudel; Rachel Morello-Frosch

    Firefighters are exposed to recognized and probable carcinogens, yet there are few studies of chemical exposures and associated health concerns in women firefighters, such as breast cancer. Biomonitoring often requires a priori selection of compounds to be measured, and so may not detect relevant, lesser known, exposures. The Women Firefighters Biomonitoring Collaborative (WFBC) created a biological sample archive and conducted a general suspect screen (GSS) to address this data gap. Using liquid chromatography-quadrupole time-of-flight tandem mass spectrometry (LC-QTOF/MS) we sought to identify candidate chemicals of interest in serum samples from 83 women firefighters (FF) and 79 women office workers (OW) in San Francisco. We identified chemical peaks by matching accurate mass from serum samples against a custom chemical database of 722 slightly polar phenolic and acidic compounds, including many of relevance to firefighting or breast cancer etiology. We then selected tentatively identified chemicals for confirmation based on the following criteria: 1) detection frequency or peak area differences between OW and FF; 2) evidence of mammary carcinogenicity, estrogenicity, or genotoxicity; and 3) not currently measured in large biomonitoring studies. We detected 620 chemicals that matched 300 molecular formulas in the WFBC database, including phthalate metabolites, phosphate flame retardant metabolites, phenols, pesticides, nitro- and nitroso-compounds, and per- and polyfluoroalkyl substances. Of the 20 suspect chemicals selected for validation, 8 were confirmed–including two alkylphenols, ethyl paraben, BPF, PFOSAA, benzophenone-3, benzyl p-hydroxybenzoate, and triphenyl phosphate--by running a matrix spike of the reference standards and using m/z, retention time and the confirmation of at least two fragment ions as criteria for matching. GSS provides a powerful high-throughput approach to identify and prioritize novel chemicals for biomonitoring and health studies.

    更新日期:2020-01-23
  • Improved modeling of sediment oxygen kinetics and fluxes in lakes and reservoirs
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Xiamei Man; Kevin A. Bierlein; Chengwang Lei; Lee Bryant; Alfred Wueest; John C. Little

    To understand water quality degradation during hypoxia, we need to understand sediment oxygen fluxes, the main oxygen sink in shallow hypolimnia. Kinetic models which integrate diffusion and consumption of dissolved oxygen (DO) in sediments usually assume a downward flux of DO from the sediment-water interface (SWI) with a zero-flux condition at the lower boundary of the oxic sediment layer. In this paper, we separately account for the oxidation of an upward flux of reduced compounds by introducing a negative flux of DO as a lower boundary condition. Using in situ measurements in two lakes, kinetic models were fit to DO microprofiles using zero-order and first-order kinetics with both zero and non-zero lower boundary conditions. Based on visual inspection and goodness-of-fit criteria, the negative-flux lower boundary condition, -0.25g O2 m-2d-1, was found to more accurately describe DO consumption kinetics. Fitted zero-order rate constants ranged from 50 – 510 mg L-1 d-1 and first-order rate constants ranged from 60 – 400 d-1, which agree well with prior laboratory studies. DO fluxes at the SWI calculated from the simulated profiles with the negative-flux lower boundary condition also showed better agreement with the observed DO fluxes than the simulated profiles with the zero-flux lower boundary condition.

    更新日期:2020-01-23
  • Selenite Sorption on Hydrated CEM-V/A Cement in the Presence of Steel Corrosion Products: Redox vs. Non-redox Sorption
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Bin Ma; Alejandro Fernandez-Martinez; Kaifeng Wang; Benoît Madé; Pierre Henocq; Delphine Tisserand; Sarah Bureau; Laurent Charlet

    Reinforced cementitious structures in nuclear waste repositories will act as barriers that limit the mobility of radionuclides (RNs) in case of eventual leakage. CEM-V/A cement, a ternary blended cement with blast furnace slag (BFS) and fly ash (FA) could be qualified and used in nuclear waste disposal. Chemical interactions between the cement and RNs are critical but not completely understood. Here, we combined wet chemistry methods, synchrotron-based X-ray techniques, and thermodynamic modelling to explore the redox interactions and non-redox sorption processes in simulated steel-reinforced CEM-V/A hydration systems using selenite as a molecular probe. Among all the steel corrosion products analysed, only the addition of Fe0 can obviously enhance the reducing ability of cement towards selenite. In comparison, steel corrosion products showed stronger reducing power in the absence of cement hydrates. Sele-nium K-edge X-ray absorption spectroscopy (XAS) revealed that selenite immobilization mechanisms included non-redox inner-/outer-sphere complexations and reductive precipita-tions of FeSe and/or Se(0). Importantly, the hydrated pristine cement showed a good reducing ability, driven by ferrous phases and (bi)sulfides (as shown by sulfur K-edge XAS) originated from BFS and FA. The overall redox potential imposed by hydrated CEM-V/A was deter-mined, hinting to a redox shift in underground cementitious structures.

    更新日期:2020-01-23
  • Influence of anaerobic mesophilic and thermophilic digestion on cytotoxicity of swine wastewaters
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Nedal Massalha; Michael J Plewa; Thanh H. Nguyen; Shengkun Dong

    Recycling wastewater from animal production for fertilizers using anaerobic digestion (AD) is common to recover the nutrients in the digestate. However, the digestate toxicity is not well understood because AD is designed for chemical oxygen demand (COD) reduction. This study determined the toxicity during AD and the controlling factors with the goal to improve digestate safety during farmer handling to reuse the nutrients. Thermophilic and mesophilic AD of two swine wastewater sources were studied. Mammalian cell cytotoxicity revealed that the effluent after thermophilic digestion was at least 69% more toxic than the mesophilic effluent, owing to higher ammonia and total organic carbon in the former. Ammonia accounted for > 55% total cytotoxicity, and the organics of thermophilic digestate were twice more toxic than those in the mesophilic digestate. Despite less toxicity contribution than ammonia, the organics did demonstrate significant adverse effects on the thiol-mediated cellular protection mechanism. For swine wastewater nutrient recovery, converting ammonia to less toxic nitrogen forms could lower the toxic hazard of the AD digestate. With much less ammonia, the organics would be the remaining decisive factor for toxicity, which is favorably reduced using thermophilic AD over mesophilic. If the ammonia is not reduced, mesophilic AD would generate less toxic digestate.

    更新日期:2020-01-23
  • Impacts of oil spills on Arctic marine ecosystems: A quantitative and probabilistic risk assessment perspective
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-23
    Inari Helle; Jussi Mäkinen; Maisa Nevalainen; Mawuli Afenyo; Jarno P. Vanhatalo

    Oil spills resulting from maritime accidents pose a poorly understood risk to the Arctic environment. We propose a novel probabilistic method to quantitatively assess these risks. Our method accounts for spatiotemporally varying population distributions, spreading of oil, and seasonally varying species-specific exposure potential and sensitivity to oil. It quantifies risk with explicit uncertainty estimates, enables comparing risks over large geographic areas, and produces information on a meaningful scale for decision-making. We demonstrate the method by assessing the short-term risks oil spills pose to polar bears, ringed seals and walrus in the Kara Sea, the western part of the Northern Sea Route. The risks differ considerably between species, spatial locations and seasons. Our results support current aspirations to ban heavy fuel oil in the Arctic, but show that we should not underestimate the risks of lighter oils either, as these oils can pollute larger areas than heavier ones. Our results also highlight the importance of spatially explicit season-specific oil spill risk assessment in the Arctic and that environmental variability and lack of data are a major source of uncertainty related to the oil spill impacts.

    更新日期:2020-01-23
  • Diagnostic Ratio Analysis: A New Concept for the Tracking of Oil Sands Process-Affected Water Naphthenic Acids and Other Water-Soluble Organics in Surface Waters
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-22
    Pamela Brunswick; Dayue Shang; Richard A. Frank; Graham Van Aggelen; Marcus Kim; L. Mark Hewitt

    A diagnostic ratio forensics tool, similar to that recognized internationally for oil spill source identification, is proposed for use in conjunction with existing LC/QToF quantitative methodology for bitumen-derived water-soluble organics (WSOs). The concept recognizes that bitumen WSOs bear a chemical skeletal relationship to stearane and hopane oil biomarkers. The method uses response ratios for 50 selected WSOs compared between samples by their relative %Difference and adopted acceptance criteria. Oil sands process-affected water (OSPW) samples from different locations within a single tailings pond were shown to match, while those from different industrial sites did not. Acid extractable organic samples collected over three weeks from the same location within a single tailings pond matched with each other; as did temporal OSPW samples a year apart. Blind quality assurance samples of OSPW diluted in surface waters were positively identified to their corresponding OSPW source. No interferences were observed from surface waters, and there was no match between bitumen-influenced groundwater and OSPW samples, as expected for different sources. Proof of concept for OSPW source identification using diagnostic ratios was demonstrated, with anticipated application in the tracking of OSPW plumes in surface receiving waters, together with the potential for confirmation of source.

    更新日期:2020-01-23
  • Toward a Global Understanding of Chemical Pollution: A First Comprehensive Analysis of National and Regional Chemical Inventories
    Environ. Sci. Technol. (IF 7.149) Pub Date : 2020-01-22
    Zhanyun Wang; Glen W Walker; Derek C. G. Muir; Kakuko Nagatani-Yoshida

    Chemicals, while bringing benefits to society, may be released during their lifecycles and possibly cause harm to humans and ecosystems. Chemical pollution has been mentioned as one of the planetary boundaries within which humanity can safely operate, but is not comprehensively understood. Here, 22 chemical inventories from 19 countries and regions are analyzed to achieve a first comprehensive overview of chemicals on the market as an essential first step toward a global understanding of chemical pollution. Over 350,000 chemicals and mixtures of chemicals have been registered for production and use, up to three times as many as previously estimated and with substantial differences across countries/regions. A noteworthy finding is that the identities of many chemicals remain publicly unknown because they are claimed as confidential (over 50,000) or ambiguously described (up to 70,000). Coordinated efforts by all stakeholders including scientists from different disciplines are urgently needed, with (new) areas of interest and opportunities highlighted here.

    更新日期:2020-01-23
  • A Review of the Sustainable Approaches in the Production of Bio-based Polyurethanes and Their Applications in the Adhesive Field
    J. Polym. Environ. (IF 2.765) Pub Date : 2020-01-22
    Adrián Tenorio-Alfonso, Mª Carmen Sánchez, José Mª Franco

    Abstract On account of the irreversible environmental damage caused by the utilization of non-renewable raw materials in industrial production, since the end of the twentieth century, the interest in replacing the traditionally applied petroleum-based starting compounds in the polyurethane production by more sustainable feedstocks has grown enormously. Such pursuit of Green Chemistry has been fostered by the implementation of a set of national and international initiatives and stricter regulations, especially in the field of adhesives. In this respect, the latest advances in the production of bio-based polyurethanes are collected in this review. Thus, after a brief introduction to this subject and main tendencies towards the production of more sustainable polyurethanes, the first section reviews the feasibility of manufacturing polyurethanes from a range of natural platforms, including lignocellulosic biomass and vegetable oils, whether modified or in their original form, along with some industrial wastes. Afterwards, the hitherto considered synthetic routes for the preparation of greener polyurethanes are assessed, encompassing waterborne, radiation-curable and non-isocyanate polyurethane techniques. Finally, the last section focuses on the research advancement on the synthesis, properties and different uses of bio-based polyurethanes specifically implemented in the field of adhesives.

    更新日期:2020-01-23
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
2020新春特辑
限时免费阅读临床医学内容
ACS材料视界
科学报告最新纳米科学与技术研究
清华大学化学系段昊泓
自然科研论文编辑服务
加州大学洛杉矶分校
上海纽约大学William Glover
南开大学化学院周其林
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug