Remediation of heavy metal pollution in farmland soil is very important to protect human health and ecological security, and biochar has a certain adsorption and fixation effect on soil heavy metals. In this paper, three kinds of biochar (unmodified biochar, acid modified biochar and biochar from pyrolysis of alkali modified rice straw, abbreviated as RBC, HRBC and KRBC, respectively) were prepared

This research study presents bio-char manufacturing from a solid waste (rice-straw) by low-temperature pyrolysis as a new trend. The as-produced char (named as BC) and its sub-driven hydrochloric and nitric acids activated carbons (labeled as HAC, and NAC respectively) were employed as adsorbents for uranium removal from a commercial grade of phosphoric acid. Morphological and structural characteristics

With the development of computer big data technology, people’s needs for smart cities are gradually increasing. The construction of smart cities should not only give ”smart” the things in the city, but also pay attention to improving the quality of the people in the city. This article uses the research object of the smart city construction model to study the advantages of smart city construction based

The Industrial revolution introduced umpteen radionuclides in the environment and their long-term exposure from ingestion and inhalation is a potential threat to the human race. In numerous developing countries, uranium and other radionuclide concentrations are higher than their recommended limits and cause adverse health effects to inhabitants. The present study depicts the uranium concentration in

Groundwater is the main source for drinking in Egypt, especially in rural communities; however, water quality of shallow aquifers is more susceptible to human activities. The current work aimed at evaluating groundwater quality for drinking and associated health risks in an area of the Nile Delta (30°14″47″ to 30°17′51″ N and 31°17′38″ to 31°20′12″ E) in response to irrigation water quality. Thirty

Malaysia has continued to increase the explosive growth rate of its industries in recent years. The rise of globalization has driven Malaysia’s economic development at the ecosystem level of pollution. This research study explores the relationship of CO2 emissions, gross domestic product, globalization, industrialization, and trade openness for Malaysia by using annual data for 1971–2016. By applying

In this research paper, Chitosan beads modified with Thiourea, Titanium Dioxide (TiO2) and Magnetite (Fe3O4) nanoparticles were prepared for Naphthalene adsorption as a polycyclic aromatic hydrocarbon model. Magnetite and TiO2 nanoparticles were prepared through co-precipitation and green chemistry method, respectively. Scanning electron microscopy (SEM) coupled to EDX detector allowed to obtain morphological

Salix psammophila has been extensively used as a sand barrier material for various desertification control applications over the years. Thus, elucidating the long-term degradation processes of this sand barrier in desert environments is of great importance. In this study, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and chemometric methods

With the introduction of the concepts of “Internet Plus”, “Industry 4.0” and “Made in China 2025”, the development of the Internet and industry has begun to influence each other, and the development of the Internet industry has more and more significant effects on industry progress. The coal mine gas explosion accident in China has seriously threatened the life safety of miners, not only restricting

This study developed an approach to synthesise zeolite LTA from three different natural heulandite class zeolite deposits (Escott, Avoca, and NextSand). The challenge was to determine the impact of pre-activation of clinoptilolite or heulandite materials upon the synthesis of zeolite LTA. Heulandite (Escott; Avoca) was thermally less stable (ca. 200 oC) than clinoptilolite (NextSand) (ca. 600 oC);

This study was aimed at harvesting of microalga, Chlorella pyrenoidosa, by using Bottom ash (BA). Utilization of an inexpensive and an easily available BA as a flocculant can be the alternative solution for reducing the harvesting cost of the microalgae and on the other side best way to utilize the unused waste from coal based thermal power plants. Herein, aimed flocculation process was evaluated and

Extracellular laccase from Trametes versicolor IBL-04 was insolubilized in the form of cross-linked enzyme aggregates (CLEAs) for degradation of different recalcitrant dyes. Among various precipitants, polyethylene glycol (PEG) ensured the best activity recovery (72.85%) of laccase-immobilized cross-linked enzyme aggregates (Lac-CLEAs) following ammonium sulfate (63.24%), n-propanol (46.98%), tert-butanol

Most current arsenic(As(V)) removal technologies are designed for low-As(V) wastewater. Consequently, the efficacy of treating high-As(V) wastewater with these technologies is generally unsatisfactory. Here, the Cobalt(Co)-loaded resin removal of As(V) in wastewater and its mechanism are discussed. Rapid adsorption and a slow equilibrium were achieved during the reaction, and the As(V) removal efficiency

Natural zeolite and rice straw have been widely used for removing nitrogen (N) from wastewater due to their different N removal mechanisms. In this study, the N removal performances of three substrate systems composed of zeolite (Z), rice straw (R) and their combination (ZR) were assessed for decontaminating farmland runoff characterized by high loads of ammonium - N or nitrate - N besides of a low

This work was executed to design and construct a scale plant as part of a water treatment process by combining filtration and disinfection in one unit, using the local medium of sand, and a Pulse Electric Field-Low Voltage (PEF-LV). The Existing Rapid Sand Filtration (ERSF) is a purely physical method of drinking water purification. Biofilm formation takes place in the sand medium and comprises three

This study investigated the effects of hydraulic retention time (HRT) on nitrous oxide (N2O) production during nitrification in a laboratory-scale biological aerated filter (BAF) reactor. Furthermore, its underlying mechanisms were explored by microelectrode technology and PCR-denaturing gradient gel electrophoresis (PCR-DGGE). The results showed that the N2O production rate was at its maximum at HRT

The existing real-time monitoring system of soil temperature in underground buildings has the defect of poor monitoring accuracy. In order to solve the above problems, the real-time monitoring system of soil temperature in underground buildings is designed based on arm. The hardware of the real-time monitoring system for the soil temperature of underground building reclamation includes the temperature

The purpose of this study is to determine the efficiency of photocatalytic​ reduction (UV/TiO2) from Hexavalent Chrome to Trivalent Chrome using a solar parabolic cylindrical concentrator for a simulated effluent sample from the tanning processes. For this purpose, a model of the solar parabolic cylindrical reactor was used, which was considered the most suitable for the capture of radiation and for

Currently, thermal treatments are used extensively to convert millions of tons of biomass and municipal solid waste into energy products. Although biogas represents ∼50% of these energy products, usually disposed due to the difficulty to extract CH4 and H2 (main flammable compounds) from their complex composition contaminated by CO2, N2, etc. Recently, Polyethersulfone (PES) membranes have been employed

Four low-cost iron-bearing geo-adsorbents were tested for As(V) removal without pretreatment: Montanit300® (M), diatomite (D), pumice (P) and black sand (BS). The solids were carefully characterized by different analytical techniques (SEM-EDX, TPD-pyridine, N2 Physisorption, XRD and point of zero charge). The adsorption of As(V) was evaluated through isotherms and kinetic studies (bottled water matrix

Water-soluble copolymers such as polyvinylpyrrolidone and polyvinyl alcohol have been widely used as detergents, paints, and chemical intermediates in many industrial processes, leading to environmental concerns associated with high-volume organic compound wastewater. Therefore, in this study, a combined upflow anaerobic sludge blanket (UASB) reactor and downflow hanging sponge (DHS) biosystem has

In the traditional urban ecosystem, the comprehensive score in hazelnut shrub pattern planning and design is not significant. Therefore, the hazelnut shrub pattern planning and design method based on remote sensing technology is proposed. The pattern of hazelnut shrub in urban ecosystem was extracted by remote sensing technology. The data for determining each information weight value was evaluated