91,136 results match your criteria waste water

Optimization of water replacement during leachate recirculation for two-phase food waste anaerobic digestion system with off-gas diversion.

Bioresour Technol 2021 Apr 30;335:125234. Epub 2021 Apr 30.

Sino-Forest Applied Research Centre for Pearl River Delta Environment, Institute of Bioresource and Agriculture, and Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR, China; School of Technology, Huzhou University, Huzhou 311800, China. Electronic address:

An integrated two-phase AD with acidogenic off-gas diversion from a leach bed reactor to an upflow anaerobic sludge blanket was developed for improving methane production. However, this system had its own technical limitation such as mass transfer efficiency for solid-state treatment. In order to optimize the mass transfer in this two phase AD system, leachate recirculation with various water replacement rates regulating the total solids contents (TS) at 12. Read More

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Effects of COVID-19 on the environment: An overview on air, water, wastewater, and solid waste.

J Environ Manage 2021 Apr 30;292:112694. Epub 2021 Apr 30.

Chemical Engineering Department, Faculty of Engineering, Minia University, Egypt; Center for Advanced Materials Research, University of Sharjah, 27272, Sharjah, United Arab Emirates; Department of Sustainable and Renewable Energy Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates.

The COVID-19 pandemic has hit the world hardly as of the beginning of 2020 and quickly spread worldwide from its first-reported point in early Dec. 2019. By mid-March 2021, the COVID-19 almost hit all countries worldwide, with about 122 and 2. Read More

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Role of cation size on swelling pressure and free energy of mica pores.

J Colloid Interface Sci 2021 Apr 20;599:694-705. Epub 2021 Apr 20.

Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, India. Electronic address:

The ion exchange capacity of clay plays an important role in many industrial applications ranging from radioactive waste disposal to cosmetics. However, swelling or shrinking of clay platelets due to water and ions adsorption in the interstitial zone is also a well-known phenomenon. For their applications, it is crucial to understand the stability of these layered materials, especially after exchange of interstitial ions with surrounding ions having different properties. Read More

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Single-well injection-withdrawal tests as a contaminant transport characterisation tool for landfilled waste.

Waste Manag 2021 May 11;128:142-153. Epub 2021 May 11.

Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK.

A new single well injection withdrawal (SWIW) test was trialled at four landfills using the tracers lithium and deuterium, and by injecting clean water and measuring electrical conductivity. The aim of the research was to develop a practical test for measuring lateral contaminant transport to aid in the design of landfill flushing. Borehole dilution tests using dyes were undertaken prior to each SWIW test to determine background flow velocities. Read More

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The implications of facility design and enabling policies on the economics of dry anaerobic digestion.

Waste Manag 2021 May 11;128:122-131. Epub 2021 May 11.

Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Biosciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States; Joint BioEnergy Institute, 5885 Hollis Street, Emeryville, CA 94720, United States.

Diverting organic waste from landfills provides significant emissions benefits in addition to preserving landfill capacity and creating value-added energy and compost products. Dry anaerobic digestion (AD) is particularly attractive for managing the organic fraction of municipal solid waste because of its high-solids composition and minimal water requirements. This study utilizes empirical data from operational facilities in California in order to explore the key drivers of dry AD facility profitability, impacts of market forces, and the efficacy of policy incentives. Read More

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Investigating the environmental impacts and engineering performance of road asphalt pavement mixtures made up of jet grouting waste and reclaimed asphalt pavement.

Environ Res 2021 May 11:111277. Epub 2021 May 11.

Department of Civil, Construction and Environmental Engineering, Federico II University of Naples, Via Claudio 21, 80125, Naples, Italy; Road Materials Laboratory La.Stra., Federico II University of Naples, Via Claudio 21, 80125, Naples, Italy. Electronic address:

As a response to the reduction of environmental pollution and energy consumption in the maintenance or building of a road pavement, this research aims to provide innovative asphalt mixture solutions when designing asphalt base layers containing solidified Jet Grouting Waste (JGW) particles. This involved adding (or not) solutions made up from Reclaimed Asphalt Pavement (RAP) obtained by milling old pavements. The first step focused on a JGW and RAP leaching test before going on to design two non-traditional mixtures: a) a hot asphalt mixture made by replacing 4% of the limestone filler by the total weight of the aggregates with JGW (HMAJ), mixing all of them at a high temperature (160÷180°C), and b) a cold asphalt mixture made by adding 3% JGW as a filler, 70% RAP (CMRAJ), and 27% limestone by the total weight of the aggregates at low temperatures (40÷50°C). Read More

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Amidation modified waste polystyrene foam as an efficient recyclable adsorbent for organic dyes removal.

Water Sci Technol 2021 May;83(9):2192-2206

College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.

Modifying environmentally harmful waste polystyrene foam as an efficient recyclable adsorbent for organic dyes is important. Amidation modified polystyrene (PS-SD) was prepared by the Friedel-Crafts reaction and N,N'-dicyclohexylcarbodiimide (DCC) dehydration condensation reaction of waste polystyrene foam. PS-SD had highly efficient removal performance for organic dyes in large volume water sample solutions, and equilibrium was achieved in 0. Read More

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Synthesis of low-cost bentonite/Duranta erecta's fruit powder imbedded alginate beads and its application in surfactant removal.

Environ Sci Pollut Res Int 2021 May 13. Epub 2021 May 13.

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam, 781039, India.

High industrialization and improved medical facilities are deteriorating aquatic bodies through untreated effluents. This study is aimed to design and characterize the bentonite, Duranta erecta, and their hybrid-alginate beads for the removal of cetyltrimethylammonium bromide (CTAB) from its aqueous solution. D. Read More

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Optimized pre-treatment of high strength food waste digestate by high content aluminum-nanocluster based magnetic coagulation.

J Environ Sci (China) 2021 Jun 4;104:430-443. Epub 2021 Jan 4.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Laboratory of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Institute of Fundamental Studies, Hantana Road, Kandy 20000, Sri Lanka. Electronic address:

Coagulation-based pre-treatment efficiency of high strength digestate of food waste (HSDFW) anaerobic digestion is negated by organic ligand-catalyzed decomposition of coagulants. In this study, an efficient HSDFW pre-treatment method, magnetic seeds (MS) coagulation, was employed by using highly stable Keggin Al nanocluster (PAC), MS and polyacrylamide (PAM), and its operation was optimized by evaluating the performance of removing turbidity, total suspended solids (TSS), chemical oxygen demand (COD), and total phosphorous (TP) phosphate. Results showed that at the optimum dosage of 4. Read More

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Simultaneous remediation and fertility improvement of heavy metals contaminated soil by a novel composite hydrogel synthesized from food waste.

Chemosphere 2021 Jul 20;275:129984. Epub 2021 Feb 20.

The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, 1515 North Zhongshan Rd. (No. 2), Shanghai, 200092, PR China. Electronic address:

Soil contamination by heavy metals constitutes a serious global environmental problem, and numerous remediation technologies have been developed. In this study, a novel soil remediation agent, namely composite hydrogel (leftover rice-g-poly(acrylic acid)/montmorillonite/Urea, LR-g-PAA/MMT/urea), was prepared based on free radical polymerization cross-linking technology. Experimental results indicated that the LR-g-PAA/MMT/urea dosage increased from 0% to 10%, the oxidizable state proportions of Cd, Cu, Pb and Zn in contaminated soil increased from 8. Read More

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Efficient peroxydisulfate activation with nZVI/CuO@BC nanocomposite derived from wastes for degradation of tetrabromobisphenol A in alkaline environment.

J Hazard Mater 2021 May 5;417:126029. Epub 2021 May 5.

School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China.

Peroxydisulfate (PDS) is a promising oxidant for sulfate radical based advanced oxidation processes (SAOPs), however its efficient activation is still a challenge. In this study, biochar-supported nano-zerovalent iron (nZVI) and copper oxide (CuO) nanocomposite (nZVI/CuO@BC), derived from low-cost wastes including scrap iron filings, copper leaching solution and corn stalks, was successfully fabricated for PDS activation to enhance tetrabromobisphenol A (TBBPA) degradation in alkaline environment. Under the conditions of 100 mg/L nZVI/CuO@BC, 0. Read More

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Digestion liquid based alkaline pretreatment of waste activated sludge promotes methane production from anaerobic digestion.

Water Res 2021 Apr 29;199:117198. Epub 2021 Apr 29.

Hunan Qing Zhi Yuan Environmental Protection Technology Co., Ltd, Changsha 410004, PR China.

This work proved an efficient method to significantly increase methane production from anaerobic digestion of WAS. This method is to reflux proper of digestion liquid into waste activated sludge pretreatment unit (pH 9.5 for 24 h). Read More

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Separation of Rare-Earth Ions from Mine Wastewater Using BS Nanoflakes as a Capacitive Deionization Electrode Material.

J Nanosci Nanotechnol 2021 Nov;21(11):5459-5476

College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology Chengdu 610059, China.

In this study, nanoflakes of BS were fabricated by plasma-assisted reaction of sulfur dichloride in an ionic liquid at room temperature using europium boride as a hard template. The nanoflakes had an average width and thickness of about 3 urn and 9.6 nm, respectively, and a large specific surface area of 1197. Read More

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November 2021

The effectiveness of divalent cation addition for highly saline activated sludge cultures: Influence of monovalent/divalent ratio and specific cations.

Chemosphere 2021 Jul 6;274:129864. Epub 2021 Feb 6.

Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar. Electronic address:

Saline wastewaters are prevalent in various industries and pose challenges to stable biological treatment. Increasing monovalent cation concentrations are commonly reported to deteriorate treatment and settling performance, while divalent cations can enhance flocculation and settling. However, many previous studies were performed at relatively low salinities and reports conflict on whether concentrations of monovalent cations, divalent cations, or their ratio (M/D) are most critical. Read More

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Resource recovery from landfill leachate: An experimental investigation and perspectives.

Chemosphere 2021 Jul 16;274:129986. Epub 2021 Feb 16.

Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Environmental and Chemical Engineering, Duy Tan University, Da Nang, 550000, Viet Nam; Laboratory of Computational Modeling of Drugs, South Ural State University, 454080, Chelyabinsk, Russia.

This work investigates the performances of coconut shell waste-based activated carbon (CSWAC) adsorption in batch studies for removal of ammoniacal nitrogen (NH-N) and refractory pollutants (as indicated by decreasing COD concentration) from landfill leachate. To valorize unused resources, coconut shell, recovered and recycled from agricultural waste, was converted into activated carbon, which can be used for leachate treatment. The ozonation of the CSWAC was conducted to enhance its removal performance for target pollutants. Read More

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Chemical source profiles of fine particles for five different sources in Delhi.

Chemosphere 2021 Jul 9;274:129913. Epub 2021 Feb 9.

Department of Civil Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.

Increasing emissions from sources such as construction and burning of biomass from crop residues, roadside and municipal solid waste have led to a rapid increase in the atmospheric concentrations of fine particulate matter (≤2.5 μm; PM) over many Indian cities. Analyses of their chemical profiles are important for receptor models to accurately estimate the contributions from different sources. Read More

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Occurrence and ecological impact of microplastics in aquaculture ecosystems.

Chemosphere 2021 Jul 16;274:129989. Epub 2021 Feb 16.

Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, Guangzhou, 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, 510642, China. Electronic address:

Extensive applications of plastic in human life has caused substantial microplastic pollution in the global environment, which, due to plastic's ubiquitous nature and everlasting ecological impact, has caused worldwide concern. In aquatic ecosystems, microplastics are ingested by aquatic animals, affecting their growth and development and resulting in trophic transfer to higher organisms in the food chain. Therefore, consumption of aquatic products is a main primary source of human exposure to microplastics. Read More

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Realizing the role of N-acyl-homoserine lactone-mediated quorum sensing in nitrification and denitrification: A review.

Chemosphere 2021 Jul 15;274:129970. Epub 2021 Feb 15.

CAS Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China. Electronic address:

Nitrification and denitrification are crucial processes in the nitrogen cycle, a vital microbially driven biogeochemical cycle. N-acyl-homoserine lactone (AHL)-mediated quorum sensing (QS) is widespread in bacteria and plays a key role in their physiological status. Recently, there has been an increase in research into how the AHL-mediated QS system is involved in nitrification and denitrification. Read More

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Impact of treated sewage on meiobenthic nematodes: a case study from the Tunisian Refining Industries Company.

Braz J Biol 2021 10;82:e246116. Epub 2021 May 10.

Laboratory of Biomonitoring of the Environment LR01 ES14, University of Carthage, Faculty of Sciences of Bizerte, Zarzouna 7021, Tunisia.

The main objective of the current study was to assess the impact of the water taken from the 'Tunisian Refining Industries Company' on meiobenthic nematodes, before and after a series of treatments in decantation basins followed by its discharge in Bizerte bay, Tunisia. The comparison of environmental parameters of the two types of water was clearly indicative of an improvement in the quality of treated waters after a significant reduction in their loads in hydrocarbons. Overall, the water retained a good quality after being treated by 'Tunisian Refining Industries Company' before discharge in the sea. Read More

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Physicomechanical performance and encapsulation efficiency of β-cyclodextrin loaded functional electrospun mats based on aliphatic polyesters and their blends.

J Biomater Sci Polym Ed 2021 May 12:1-14. Epub 2021 May 12.

Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.

Designing complex-forming biodegradable and biocompatible electrospun mats (EMs) by incorporating β- cyclodextrin (β-CD) into polylactic acid PLA)/poly(ε-caprolactone) (PCL) (70:30 w/w) blend based polyester matrix. The influence of β-CD loading on the morphological, thermal, and microstructural properties was investigated using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The studies revealed the presence of characteristic interactions between the polymer matrix and β-CD moieties. Read More

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Ag-exchanged mesoporous chromium terephthalate with sulfonate for removing radioactive methyl iodide at extremely low concentrations in humid environments.

J Hazard Mater 2021 Apr 17;417:125904. Epub 2021 Apr 17.

Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology (KRICT), Jang-dong, Yuseong, Daejeon 34114, Republic of Korea; Department of Advanced Materials and Chemical Engineering, University of Science and Technology (UST), Gajeong-dong, Yuseong, Daejeon 34113, Republic of Korea. Electronic address:

The development of efficient adsorbents to remove radioactive methyl iodide (CHI) in humid environments is crucial for air purification after pollution by nuclear power plant waste. In this work, we successfully prepared a post-synthetic covalent modified MIL-101 with a sulfonate group followed by the ion-exchange of Ag (I), which is well characterized by diffuse reflectance FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS) and the hydrophobic index (HI). After modification of the MOFs, we applied functionalized MIL-101 obtained by either one-pot synthesis (MIL-101-SOAg) or a post-synthetic modification process (MIL-101-RSOAg, R = NH(CH)) to remove the CHI at an extremely low concentration (0. Read More

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Natural community of macroalgae from chromium-contaminated site for effective remediation of Cr(VI)-containing leachates.

Sci Total Environ 2021 May 4;786:147501. Epub 2021 May 4.

Department of Physical Geography, University of Wrocław, ul. W. Cybulskiego 34, 50-205 Wrocław, Poland.

The natural macroalgal community, which developed in the unique and extremely Cr(VI)-polluted aquatic reservoir situated near a historical chromium-waste landfill, was studied in order to recognize the main mechanisms of Cr(VI) detoxification by the algal species. The conducted taxonomic analysis revealed mixed composition of the filamentous forms of algae and showed that three species of Tribonema, namely T. vulgare, T. Read More

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Effect of different rearing system on eggs production, hatchability, and offspring quality in layer breeders.

Poult Sci 2021 Mar 11;100(6):101101. Epub 2021 Mar 11.

Department of Biotechnology and Nutrigenomics, Institute of Genetics and Animal Biotechnology, Polish Academy of Sciences, Jastrzębiec 36 A, Magdalenka, Poland.

This study analyzed the influence of an aviary system, in comparison with battery cages, on rearing and reproduction of parent-stock (PS) laying-type chickens. ISA Brown PS chicks were reared for 16 wk in battery cages or in an aviary system. Chickens reared in cages were kept there throughout the rearing period, whereas those reared in the aviary were released after 7 wk. Read More

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Uptake and bio-transformation of telmisartan by cress (Lepidium sativum) from sewage treatment plant effluents using high-performance liquid chromatography/drift-tube ion-mobility quadrupole time-of-flight mass spectrometry.

Environ Sci Pollut Res Int 2021 May 10. Epub 2021 May 10.

Institute of Analytical Chemistry, Johannes Kepler University, Altenberger Strasse 69, 4040, Linz, Austria.

In the present study, the uptake and metabolization of the sartan drug telmisartan by a series of plants was investigated. Thereby for seven potential metabolites, modifications on the telmisartan molecule such as hydroxylation and/or glycosylation could be tentatively identified. For two additional signals detected at accurate masses m/z 777. Read More

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Destroying the structure of extracellular polymeric substance to improve the dewatering performance of waste activated sludge by ionic liquid.

Water Res 2021 Apr 17;199:117161. Epub 2021 Apr 17.

Sichuan Base of International Science and Technology Cooperation for Green Chemical Industry, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China. Electronic address:

The disposal and resource utilization of waste activated sludge (WAS) is a big challenge for its high moisture content. Ionic liquid (IL), 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTf]), was innovatively used as a conditioner to improve the dewatering performance of WAS. The WAS was characterized by flocs size, three-dimensional excitation-emission matrix (3D-EEM), zeta potential, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) for the investigation of intensification mechanism. Read More

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Detecting pollutant sources and pathways: High-frequency automated online monitoring in a small rural French/German transborder catchment.

J Environ Manage 2021 May 7;290:112619. Epub 2021 May 7.

Institute of Inorganic and Analytical Chemistry, Saarland University, Dudweiler Zeile 4, 66125, Saarbruecken, Germany.

Great temporal and spatial variability of inputs make comprehensive monitoring in small and middle sized rivers difficult. In this study, relevant inputs in a small river were recorded with suitable online monitoring equipment coupled in mobile water quality monitoring stations, the study area being a transborder catchment with French and German (Saarland federal state) subcatchments. In addition to a pronounced spatial variability necessitating a denser net of measuring points this catchment has also to be assessed in the light of different national regulations. Read More

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One-pot pyrolysis of a typical invasive plant into nitrogen-doped biochars for efficient sorption of phthalate esters from aqueous solution.

Chemosphere 2021 May 3;280:130712. Epub 2021 May 3.

Co-Innovation Center for the Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing, 210037, PR China; National Positioning Observation Station of Hung-tse Lake Wetland Ecosystem in Jiangsu Province, Huaian, Jiangsu, 223100, PR China. Electronic address:

Invasive plants pose a significant threat to natural ecosystems because of their high adaptability, rapid propagation and spreading ability in the environment. In this study, a typical aquatic invasive plant, Pistia stratiotes, was chosen as a novel feedstock for the preparation of nitrogen-doped biochars (NBs) for the first time, and the NBs were used as efficient sorbents to remove phthalate esters (PAEs) from aqueous solution. Characterization results showed that NBs possess great pore structure (up to 126. Read More

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Accelerated start-up for photo-fermentative hydrogen production in biofilm reactor by adding waste effluent.

Environ Res 2021 May 7;198:111221. Epub 2021 May 7.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, P.O. Box 2614, 73 Huanghe Road, Harbin, 150090, China. Electronic address:

The difficulty and long duration of start-up wastes numerous costs, labors and time and a little fluctuate during the process might fail it. However, studies dealing with the problem hindering accelerated start-up are still insufficient. Current research focused to develop a method for accelerated start-up in an efficient way. Read More

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Microwave applications in the food industry: an overview of recent developments.

Crit Rev Food Sci Nutr 2021 May 10:1-20. Epub 2021 May 10.

Department of Animal Products Technology, Faculty of Food Technology, University of Agriculture, Poland in Cracow, Krakow.

Microwave radiation has the ability to heat a material with dielectric properties. Material absorbs microwave energy and then converts it into heat, which gives the possibility of a wide use of microwaves in many industry sectors or agricultural sciences. Microwaves are especially widely used in food industry. Read More

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A Plant Leaf-Mimetic Membrane with Controllable Gas Permeation for Efficient Preservation of Perishable Products.

ACS Nano 2021 May 10. Epub 2021 May 10.

Research Institute of Resources Insects, Chinese Academy of Forestry, 650233 Kunming, China.

About one-third of the world's food is lost and wasted each year, along with excessive carbon emission, disposals, and other environmental issues. The rotting of perishable products like fruits and vegetables accounts for the largest percentage of food waste due to their short shelf life. The storage atmosphere (HO, O, CO) acts as a key role in the preservation process and could regulate plants' physiological metabolism and microbial growth. Read More

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