25,113 results match your criteria Chemosphere[Journal]


Perfluorooctanoic acid induces cytotoxicity in spermatogonial GC-1 cells.

Chemosphere 2020 Jul 7;260:127545. Epub 2020 Jul 7.

Department of Physiology, School of Basic Medical Sciences, Jiangxi Provincial Key Laboratory of Reproductive Physiology and Pathology, Nanchang University, Nanchang, 330006, PR China. Electronic address:

Perfluorooctane acid (PFOA), a typical perfluorinated chemical, has been suggested to interfere with male reproductive function. In this study, mouse spermatogonial GC-1 cells were in vitro treated with PFOA (250, 500 or 750 μM) for 24 h to investigate the cytotoxicity of PFOA and its underlying mechanisms. Our results indicated that exposure to intermediate and high doses of PFOA suppressed the viability of GC-1 cells in a concentration-dependent manner. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127545DOI Listing

The effects of ionizing radiation on the structure and antioxidative and metal-binding capacity of the cell wall of microalga Chlorella sorokiniana.

Chemosphere 2020 Jul 8;260:127553. Epub 2020 Jul 8.

Department of Life Sciences, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030, Belgrade, Serbia. Electronic address:

The impact of ionizing radiation on microorganisms such as microalgae is a topic of increasing importance for understanding the dynamics of aquatic ecosystems in response to environmental radiation, and for the development of efficient approaches for bioremediation of mining and nuclear power plants wastewaters. Currently, nothing is known about the effects of ionizing radiation on the microalgal cell wall, which represents the first line of defence against chemical and physical environmental stresses. Using various microscopy, spectroscopy and biochemical techniques we show that the unicellular alga Chlorella sorokiniana elicits a fast response to ionizing radiation. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127553DOI Listing

Cytokinin alleviates cypermethrin toxicity in Nostoc muscorum by involving nitric oxide: Regulation of exopolysaccharides secretion, PS II photochemistry and reactive oxygen species homeostasis.

Chemosphere 2020 Jun 14;259:127356. Epub 2020 Jun 14.

Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, A Constituent Post Graduate College of University of Allahabad, Prayagraj, 211002, India. Electronic address:

Growth of the most important nitrogen fixing cyanobacterium Nostoc muscorum is reported to be badly affected by the application of insecticides. To overcome their damaging effects, several strategies are being used. Out of these, some works on kinetin (KN, a synthetic cytokinin) has been recognized that it can overcome toxicity of insecticides in cyanobacteria. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127356DOI Listing

Atmospheric oxidation of indene initiated by OH radical in the presence of O and NO: A mechanistic and kinetic study.

Chemosphere 2020 Jun 25;259:127331. Epub 2020 Jun 25.

Environment Research Institute, Shandong University, Qingdao, 266237, PR China. Electronic address:

The atmospheric degradation of polycyclic aromatic hydrocarbons (PAHs) can generate organic pollutants that contribute to the formation of secondary organic aerosols (SOAs) and exacerbate their carcinogenicity. Indene is an example of styrene-like bicyclic hydrocarbons that are not fully aromatic. The OH-initiated atmospheric oxidation of indene in the presence of O and NO was investigated using quantum chemical methods at M06-2X/6-311++G(3df,2p)//M06-2X/6-311+G(d,p) level. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127331DOI Listing

Phytoremediation of metal-contaminated rare-earth mining sites using Paspalumconjugatum.

Chemosphere 2020 Jun 25;259:127280. Epub 2020 Jun 25.

College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China. Electronic address:

Over-exploitation of rare-earth elements causes cadmium (Cd)- and lead (Pb)-contamination of rare-earth mine tailings. Here, Paspalum conjugatum was used as a hyperaccumulating perennial herb to evaluate its phytoextraction potential for removing metals in a hydroponic experiment. Further, an in-situ experiment was conducted for two years (2016-2018) to investigate the potential of P. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127280DOI Listing

Abundance and sources of benzo[a]pyrene and other PAHs in ambient air in Hong Kong: A review of 20-year measurements (1997-2016).

Chemosphere 2020 Jul 5;259:127518. Epub 2020 Jul 5.

Department of Chemistry and Division of Environment, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China; Division of Environment, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China. Electronic address:

The polycyclic aromatic hydrocarbon (PAH) family is of environmental concern due to its toxicity, prompting the need of monitoring their long-term trends. Three monitoring programs in Hong Kong report concentrations of ambient PAHs, namely (1) respirable suspending particle (RSP) speciation program that monitored benzo[a]pyrene (BaP) (1997 to March 2000), (2) total suspended particle speciation program that monitored BaP (1997-1999), and (3) toxic air pollutant monitoring program that monitors BaP and 16 other PAHs in the combined gas and particulate phases at two general urban stations once or twice a month since January 1998. In this work, we review all the available PAH measurements in Hong Kong during 1997-2016, with emphasis on the temporal trends of BaP and the other 16 PAHs. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127518DOI Listing

Surface properties and suspension stability of low-temperature pyrolyzed biochar nanoparticles: Effects of solution chemistry and feedstock sources.

Chemosphere 2020 Jun 30;259:127510. Epub 2020 Jun 30.

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China; Institute of Soil and Water Conservation, Chinese Academy of Sciences, Ministry of Water Resources, Yangling, Shaanxi, 712100, China.

Intensive application of biochar requires better understanding of their environmental behaviors such as stability, fate, and mobility. The release of bulk biochar into biochar nanoparticles (NPs) may bring risks because of their potential flowing into downstream water bodies with nutrients/containments attached. Low-temperature pyrolyzed biochars, namely fruit tree branch biochar of 350/450/550 °C (FB350, FB450 and FB550), corn straw biochar of 350 °C (CB350) and peanut straw biochar of 350 °C (PB350), were produced, and their NPs were extracted. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127510DOI Listing

Lead removal from water by a newly isolated Geotrichum candidum LG-8 from Tibet kefir milk and its mechanism.

Chemosphere 2020 Jul 1;259:127507. Epub 2020 Jul 1.

College of Food Science and Technology, Nanjing Agricultural University, 210095, Nanjing, Jiangsu, China. Electronic address:

In this study, a yeast-like fungal strain (LG-8), newly isolated from spontaneous Tibet kefir in China, was identified as Geotrichum candidum on the basis of its morphological characteristics and ITS5.8S gene sequence. Interestingly, the strain was able to remove more than 99% of Pb ions in water at low concentrations and a maximum of 325. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127507DOI Listing

Influences of hexafluoropropylene oxide (HFPO) homologues on soil microbial communities.

Chemosphere 2020 Jul 1;259:127504. Epub 2020 Jul 1.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China. Electronic address:

Hexafluoropropylene oxide (HFPO) homologues, as emerging perfluoroalkyl substances (PFASs) to replace legacy PFASs, have wide applications in the organofluorine industry and have been detected in the global environment. However, it is still unclear what effect HFPO homologues will exert on microbial abundance, community structure and function. The objective of this study was to assess potential impacts of HFPO homologue acids on archaea, bacteria, and ammonia-oxidizing archaea (AOA) and bacteria (AOB) in the soil environment. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127504DOI Listing

Biomimetic degradability of linear perfluorooctanesulfonate (L-PFOS): Degradation products and pathways.

Chemosphere 2020 Jul 2;259:127502. Epub 2020 Jul 2.

Xiamen Engineering & Technology Research Center for Urban Water Environment Planning and Remediation, College of Civil Engineering, Huaqiao University, Xiamen, 361021, China. Electronic address:

The reductive degradability and decomposition pathways of linear perfluorooctanesulfonate (L-PFOS) were investigated in a biomimetic system consisting of Ti(III)-citrate and Vitamin B. Biomimetic degradation of L-PFOS could well be described by a first-order exponential decay model. Accompanied by the release of fluoride ion, technical PFOS could not only be transformed to perfluorocarboxylates (PFCAs) and perfluoroalkylsulfonates (PFSAs) with perfluoroalkyl carbon chain length < C8 (thereafter referred as carbon-chain-shortened degradation products), but also be transformed to PFCAs with perfluoroalkyl carbon chain length ≥ C8 (thereafter referred as carbon-chain-lengthened degradation products). Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127502DOI Listing

Effects of zinc acquired through the plant-aphid-ladybug food chain on the growth, development and fertility of Harmonia axyridis.

Chemosphere 2020 Jun 30;259:127497. Epub 2020 Jun 30.

College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, Zhejiang, China. Electronic address:

Heavy metal pollution is an increasingly serious problem in agricultural ecosystems. Zinc accumulation in the food chain may harm the physiological functions of organisms, including herbivorous and predatory insects. Its effects on development and reproduction in Harmonia axyridis are largely unknown. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127497DOI Listing

Removal of organic compounds from cooling tower blowdown by electrochemical oxidation: Role of electrodes and operational parameters.

Chemosphere 2020 Jul 1;259:127491. Epub 2020 Jul 1.

Department of Environmental Technology, Wageningen University and Research, P.O. Box 17, 6700 AA, Wageningen, the Netherlands. Electronic address:

The reuse of cooling tower blowdown (CTBD) in the cooling tower itself requires CTBD deionization and a pre-treatment before deionization to remove organic compounds (OCs) that induce membrane fouling. This study assesses the potential of electrochemical oxidation (EO) with a boron-doped diamond (BDD) and a Ti/RuO mixed-metal oxide (MMO) anode for CTBD pre-treatment. Also, the influence of the applied current density (j), initial pH, hydrodynamic conditions, and supporting electrolyte on the process performance was evaluated. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127491DOI Listing

Adipokinetic hormone regulates cytochrome P450-mediated imidacloprid resistance in the brown planthopper, Nilaparvata lugens.

Chemosphere 2020 Jul 2;259:127490. Epub 2020 Jul 2.

College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China. Electronic address:

Insect resistance to chemical insecticide is a global problem that presents an ongoing threat to sustainable agriculture. Although the increased production of detoxification enzymes has been frequently implicated in resistance development, the mechanisms employed by insecticide-resistant insects for overexpression of these genes remain elusive. Here we report that neuropeptide adipokinetic hormone (AKH) negatively regulates the expression of CYP6ER1 and CYP6AY1, two important cytochrome P450 monooxygenases (P450s) that confer resistance to neonicotinoid imidacloprid in the brown planthopper (BPH). Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127490DOI Listing

Cell-by-cell estimation of PAH sorption and subsequent toxicity in marine phytoplankton.

Chemosphere 2020 Jul 1;259:127487. Epub 2020 Jul 1.

Division of Biological and Environmental Science and Engineering (BESE), Red Sea Research Center (RSRC), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.

Polycyclic Aromatic Hydrocarbons (PAHs) have elicited increasing concern due to their ubiquitous occurrence in coastal marine environments and resultant toxicity in organisms. Due to their lipophilic nature, PAHs tend to accumulate in phytoplankton cells and thus subsequently transfer to other compartments of the marine ecosystem. The intrinsic fluorescence properties of PAHs in the ultraviolet (UV)/blue spectral range have recently been exploited to investigate their uptake modes, localization, and aggregation in various biological tissues. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127487DOI Listing

Evaluating toxicity impacts of environmental exposed chromium on small Indian mongoose (Urva auropunctatus) hematological, biochemical and histopathological functioning.

Chemosphere 2020 Jul 1;259:127485. Epub 2020 Jul 1.

Faculty of Information Technology, University of Information Technology and Management, Rzeszow, Poland.

Sub-lethal toxic impacts of chromium on hematological, biochemical and histological parameters were analyzed in the female small Indian mongoose (Urva auropuctatus) residing contaminated environment of tannery industry. Chromium bioaccumulation in the blood, liver and kidney tissue of the exposed mongooses was found elevated compared to the control mongooses' tissues. Total body weight (75. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127485DOI Listing

Acute toxicity of Zinc Oxide nanoparticles to silkworm (Bombyx mori L.).

Chemosphere 2020 Jul 3;259:127481. Epub 2020 Jul 3.

College of Biotechnology and Sericultural Research Institute, Jiangsu University of Science and Technology, Zhenjiang, 212018, PR China. Electronic address:

Zinc Oxide nanoparticles (ZnO NPs) has been heavily used in the industry, and increasing concerns on the ecotoxicity has arisen due to the risk of release into the environment. In this work, silkworm was used here as a model organism to study the toxicity of ZnO NPs, due to the presence of a conserved immune response as well as a pharmacokinetics similar to mammals. Zn accumulation, biodistribution and toxicity in silkworms were monitored at different time points after a subcutaneous injection. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127481DOI Listing

"Numerical modelling of PM10 dispersion in open-pit mines".

Chemosphere 2020 Jun 22;259:127454. Epub 2020 Jun 22.

University of North Carolina, Institute of Environment North Carolina, USA. Electronic address:

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http://dx.doi.org/10.1016/j.chemosphere.2020.127454DOI Listing

Green synthesis and environmental application of iron-based nanomaterials and nanocomposite: A review.

Chemosphere 2020 Jun 28;259:127509. Epub 2020 Jun 28.

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India. Electronic address:

Green chemistry has been proven to be an efficient route for nanoparticle synthesis. Plant extract based green synthesis of various nanoparticles is extensively studied since the last decade. This paper "Green synthesis and environmental application of Iron-based nanomaterials and nanocomposite: A review" unveils all the possible greener techniques for the synthesis of iron-based nanoparticles and nanocomposites. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127509DOI Listing

Adsorption and catalytic oxidation of arsenite on Fe-Mn nodules in the presence of oxygen.

Chemosphere 2020 Jun 30;259:127503. Epub 2020 Jun 30.

Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture and Rural Affairs of the People's Republic of China, Hubei Key Laboratory of Soil Environment and Pollution Remediation, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, Hubei Province, China. Electronic address:

Fe-Mn nodules affect the speciation, transformation and migration of arsenic (As) via redox and adsorption reactions. However, few studies have been concerned with their interaction in the presence of dissolved oxygen. In this work, the interaction mechanism of As(III) and Fe-Mn nodules was studied in different atmospheres. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127503DOI Listing

Hydroxyl radical scavenging factor measurement using a fluorescence excitation-emission matrix and parallel factor analysis in ultraviolet advanced oxidation processes.

Chemosphere 2020 Jun 22;259:127396. Epub 2020 Jun 22.

Department of Environmental Engineering (YIEST), Yonsei University, Republic of Korea.

The performance of the UV/HO advanced oxidation process (AOP) is dependent on water quality parameters, including the UV absorbance coefficient at 254 nm and hydroxyl radical (•OH) water background demand (scavenging factor, s). The •OH scavenging factor represents the •OH scavenging rate of the background substances in the water matrix, and it is known to be one of the key parameters to predict the performance of the UV/HO process. The •OH scavenging factor has been determined experimentally by using a probe compound such as pCBA and rhodamine B. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127396DOI Listing

PM spatial distribution and metals speciation study in the Bilbao metropolitan area during the 2017-2018 period.

Chemosphere 2020 Jul 1;259:127482. Epub 2020 Jul 1.

Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country UPV/EHU, P.O. Box 644, 48080, Bilbao, Basque Country, Spain.

Speciation of respirable particles is becoming increasingly important from an epidemiological and analytical point of view to determine the potential effects of air pollution on human health. For this reason, current laws and analytical sampling methods focus on particle size, as it turns out to be the main factor for the greater or lesser penetration into the airways. In this sense, particles of less than 10 μm in diameter (<10 μm), referred to as PM, are the particles that have a higher capacity for access to the respiratory tract and, therefore, more significant effect on them. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127482DOI Listing

Analysis of genotoxic effects on plants exposed to high traffic volume in urban crossing intersections.

Chemosphere 2020 Jun 29;259:127511. Epub 2020 Jun 29.

Federal University of Uberlândia, Institute of Biotechnology, Umuarama Campus, Uberlândia, Minas Gerais, Brazil; Federal University of Uberlândia, Institute of Geography, Santa Mônica Campus, Avenida João Naves de Ávila, 2121, 38.408-100, Uberlândia, Minas Gerais, Brazil. Electronic address:

A biological assessment of environmental quality was performed using the tropical plant species Tradescantia pallida (Rose) D.R. Hunt. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127511DOI Listing

An efficient oxic-anoxic process for treating low COD/N tropical wastewater: Startup, optimization and nitrifying community structure.

Chemosphere 2020 Jun 19;259:127444. Epub 2020 Jun 19.

Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia. Electronic address:

In this study, we assessed and optimized a low-dissolved-oxygen oxic-anoxic (low-DO OA) process to achieve a low-cost and sustainable solution for wastewater treatment systems in the developing tropical countries treating low chemical oxygen demand-to-nitrogen ratio (COD/N) wastewater. The low-DO OA process attained complete ammonia removal and the effluent nitrate nitrogen (NO-N) was below 0.3 mg/L. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127444DOI Listing

High adsorption capacity of Mg-Al-modified biochar for phosphate and its potential for phosphate interception in soil.

Chemosphere 2020 Jun 19;259:127469. Epub 2020 Jun 19.

Institute of Agricultural Resource and Regional Planning, Chinese Academy of Agricultural Sciences/Key Lab of Plant Nutrition and Nutrient Cycling, Ministry of Agriculture, Beijing, 100081, China. Electronic address:

In this study, Mg and/or Al modified biochars (MABC, MBC, ABC) prepared by co-precipitation were to explore their phosphate adsorption capacity from aqueous solution and the potential for soil phosphate interception. The results revealed that MABC composites contained more functional groups than MBC and showed a higher surface area than ABC. The surface of MABC contained dispersed MgAlO, Mg(OH), AlOOH and AlO crystals that were associated with its enhanced maximum phosphate adsorption capacity (153. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127469DOI Listing

Electrochemical degradation of three phthalate esters in synthetic wastewater by using a Ce-doped Ti/PbO electrode.

Chemosphere 2020 Jun 30;259:127488. Epub 2020 Jun 30.

College of Resources and Environment, Southwest University, Chongqing Key Laboratory of Agricultural Resources and Environment, Chongqing, 400715, PR China. Electronic address:

A Ce-doped Ti/PbO electrode was prepared in a deposition solution containing Ce and Pb ions by electrodeposition, and the surface morphology, crystal structure and elemental states were characterized by SEM, XRD and XPS. The electrode was used to investigate the simultaneous degradation of three phthalate esters (PAEs), i.e. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127488DOI Listing

Comparative study on photocatalytic degradation of the antidepressant trazodone using (Co, Fe and Ru) doped titanate nanowires: Kinetics, transformation products and in silico toxicity assessment.

Chemosphere 2020 Jul 1;259:127486. Epub 2020 Jul 1.

Departamento de Química e Bioquímica, Faculdade de Ciências, ULisboa, 1749-016, Lisboa, Portugal; Laboratório de FTICR e Espectrometria de Massa Estrutural, Faculdade de Ciências, ULisboa, 1749-016, Lisboa, Portugal.

Titanate nanomaterials have been outstanding in the removal of emerging contaminants by the photocatalysis process. These photocatalysts, when modified through techniques such as doping with metals, they have advantages over TiO, especially in the region of visible light. In this work, the photocatalytic performance of four recent reported catalysts, pristine titanate nanowires, cobalt-doped titanate nanowires, iron-doped titanate nanowires and ruthenium-doped titanate nanowires, for the removal of the antidepressant trazodone under visible light radiation was compared. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127486DOI Listing

Prevalence of antibiotic resistance genes in drinking water and biofilms: The correlation with the microbial community and opportunistic pathogens.

Chemosphere 2020 Jul 1;259:127483. Epub 2020 Jul 1.

College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.

The emergence of antibiotic resistance genes (ARGs) and opportunistic pathogens (OPs) in drinking water system posed potential risks to human health. However, the occurrence of ARGs and OPs in drinking water biofilms is still at its infancy. In this study, we investigated the occurrence of ARGs and OPs in both water and biofilm samples from a drinking water system, and the correlation between ARGs and microbial communities was analyzed. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127483DOI Listing

Use of a clay mineral and its nonionic and cationic organoclay derivatives for the removal of pharmaceuticals from rural wastewater effluents.

Chemosphere 2020 Jul 1;259:127480. Epub 2020 Jul 1.

Institut des Sciences de La Terre D'Orléans, UMR 7327, CNRS-Université D'Orléans, 1A Rue de La Férollerie, 45071 Orléans Cedex 2, France; Global Center for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo, 169-8555, Japan. Electronic address:

A Na exchanged montmorillonite clay (Na-Mt) and its organoclay derivatives prepared with benzyldimethyltetradecylammonium (BDTA) cationic and polyoxyethylene (20)oleyl-ether (Brij-O20) non-ionic surfactants were used for first time at our knowledge as adsorbents the removal diverse pharmaceuticals (PPs) from samples collected in a rural wastewater facility (town of Josnes in France). The selected facility showed a poor efficiency for the elimination of PPs that were permanently release to the environment. Although involving different interactional mechanisms, the whole adsorbents Na-Mt, nonionic Brij-Mt and cationic BDTA-Mt organoclays, could remove the entire PPs of various chemical nature in a low concentration regime (ng L), where electrostatic interactions mainly controlled the adsorption. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127480DOI Listing

The effect of the COD: N ratio on mainstream deammonification in an integrated fixed-film activated sludge sequencing batch reactor.

Chemosphere 2020 Jun 29;259:127426. Epub 2020 Jun 29.

Department of Urban Water- and Waste Management, University of Duisburg-Essen, Universitätsstraße 15, 45141, Essen, Germany.

For eight months, a sequencing batch reactor (SBR) with integrated fixed-film activated sludge (IFAS) was operated in ambient temperature to study engineering and practical aspects of application of deammonification for mainstream conditions. For biofilm formation, K3 Kaldnes carriers were used, where the anaerobic ammonium oxidation (anammox) process can occur in deep layers of biofilm, while partial nitritation occurs in oxygen-rich outer layers. After the initial running phase of the reactor (Phase 1) to provide time for microorganisms to adapt, the COD: N ratio increased to around 2. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127426DOI Listing

Effect of fomesafen on the embryonic development of zebrafish.

Chemosphere 2020 Jun 12;259:127380. Epub 2020 Jun 12.

Center for drug screening and research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; College of life and science, Gannan Normal University, Ganzhou, 341000, Jiangxi, China; Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Ji'an, 343009, Jiangxi, China; Jiangxi Key Laboratory of Developmental Biology of Organs, Jinggangshan University, Ji'an, 343009, Jiangxi, China. Electronic address:

Fomesafen is widely used in agriculture and can be detected in the environment and agricultural products. Research on the developmental toxicity of fomesafen in animals is currently very limited. Here, we used zebrafish as an animal model to evaluate the toxicity of fomesafen in developing aquatic vertebrates and higher animals. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127380DOI Listing

Fabrication porous adsorbents templated from modified sepiolite-stabilized aqueous foams for high-efficient removal of cationic dyes.

Chemosphere 2020 Jun 17;259:126949. Epub 2020 Jun 17.

Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China. Electronic address:

High internal phase emulsions (HIPEs) as template for fabrication of porous materials has attracted much attention, due to the high porosity and tunable porous structure. But the enormous consumption of organic solvents is still a nightmare for the practical application. In comparison, the aqueous foam without need any organic solvent and hence has greater advantages in the porous materials preparation. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.126949DOI Listing

Field-evolved resistance to chitin synthesis inhibitor insecticides by soybean looper, Chrysodeixis includens (Lepidoptera: Noctuidae), in Brazil.

Chemosphere 2020 Jun 29;259:127499. Epub 2020 Jun 29.

Department of Plant Protection, Federal University of Santa Maria (UFSM), Roraima Avenue 1000, Santa Maria, Rio Grande do Sul, 97105-900, Brazil. Electronic address:

Soybean looper (SBL), Chrysodeixis includens (Walker), is an economically important soybean and cotton pest in Brazil. Here, we selected an SBL strain resistant to teflubenzuron using F screening, estimated the resistance allele frequency, characterized the inheritance of resistance, investigated fitness costs, evaluated patterns of cross-resistance, and determined the magnitude of resistance. The teflubenzuron-resistant strain (Teflu-R) was selected from field-collected populations with an estimated allele frequency of 0. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127499DOI Listing

Exposure, assessment and health hazards of particulate matter in metal additive manufacturing: A review.

Chemosphere 2020 Jun 20;259:127452. Epub 2020 Jun 20.

Beijing Key Laboratory of Occupational Safety and Health, Beijing Municipal Institute of Labour Protection, Beijing Academy of Science and Technology, Beijing, 100054, China. Electronic address:

Metal additive manufacturing (AM), also known as metal three-dimensional (3D) printing, is a new technology offering design freedom to create complex structures that has found increasing applications in industrial processes. However, due to the fine metal powders and high temperatures involved, the printing process is likely to generate particulate matter (PM) that has a detrimental impact on the environment and human health. Therefore, comprehensive assessement of the exposure and health hazards of PM pollution related to this technique is urgently required. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127452DOI Listing

Sorption and degradation of ranitidine in soil: Leaching potential assessment.

Chemosphere 2020 Jul 1;259:127495. Epub 2020 Jul 1.

Department of Chemistry, College of Science, Al-Nahrain University, Baghdad, Iraq.

Pharmaceuticals have been categorized as emerging contaminants that may be hazardous to the environment. To assess their environmental risk, understanding their fate and behaviour is highly needed, particularly in soil where little is known. This study investigated sorption, degradation and mobility potential of ranitidine (RAN) from soil to groundwater in two soils with different physicochemical properties. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127495DOI Listing

Nitrogen-deficient g-CN/POMs porous nanosheets with P-N heterojunctions capable of the efficient photocatalytic degradation of ciprofloxacin.

Chemosphere 2020 Jun 20;259:127465. Epub 2020 Jun 20.

College of Science, Central South University of Forestry and Technology, Changsha, 410004, PR China. Electronic address:

The direct shedding of piperazine rings is critical for the degradation of antibiotic persistent organic pollutants. In this work, nitrogen-deficient g-CN loaded with polyoxometalates porous photocatalysts with P-N heterojunctions were carried out through the formation of chemical bonds between the nitrogen-deficient C in g-CN and the bridging oxygen in polyoxometalates (POMs), including phosphomolybdic acid (PMA), phosphotungstic acid (PTA) and silicotungstic acid (STA). The adsorption and photocatalysis experiments confirm the ability of the g-CN/POMs nanosheets to efficiently remove ciprofloxacin via the synergistic effects of adsorption and photo-catalysis. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127465DOI Listing

Physiological mechanisms and phytoremediation potential of the macrophyte Salvinia biloba towards a commercial formulation and an analytical standard of glyphosate.

Chemosphere 2020 Jun 19;259:127417. Epub 2020 Jun 19.

Grupo de Estudos em Recursos Vegetais, Programa de Pós-Graduação em Recursos Naturais, Universidade Estadual de Mato Grosso do Sul, CP 350, 79804-970, Dourados, MS, Brazil. Electronic address:

Glyphosate (Gly) is the most widely used herbicide in the world and has broad-spectrum and non-selective activity. Its indiscriminate use hence risks contamination of water bodies and can affect living organisms, especially sensitive or resistant non-target plants. Despite this, studies on physiological mechanisms and Gly remediation in Neotropical aquatic plants remain limited. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127417DOI Listing

Incorporation of iron (oxyhydr)oxide nanoparticles with expanded graphite for phosphorus removal and recovery from aqueous solutions.

Chemosphere 2020 Jun 23;259:127395. Epub 2020 Jun 23.

Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea. Electronic address:

In this work, iron (oxyhydr)oxide nanoparticle-doped expanded graphite (IO/EG-1 and IO/EG-2) was prepared via a hydrothermal reaction and applied for the phosphorus adsorption in the aqueous solutions. The analysis of scanning electron microscopy (SEM) and X-ray diffraction (XRD) verified the successful fabrication of IO/EGs, and iron (oxyhydr)oxide nanoparticles became more crystalized according to the calcination at high temperature (IO/EG-2). The maximum adsorption capacity of IO/EG-1 was considerably higher (7. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127395DOI Listing

Aquatic testing guidelines insufficiently control the influence of dilution water toc and hardness on cationic polymer toxicity - A proposal to improve standardized test procedures.

Chemosphere 2020 Jun 20;259:127473. Epub 2020 Jun 20.

Experimental Ecotoxicology, BASF SE, Carl-Bosch-Strasse 38, 67056, Ludwigshafen, Germany.

Cationic polymers (CPs) are widely used chemicals for wastewater treatment applications and in various "down-the-drain" household products. The aquatic toxicity of CPs results from an electrostatic interaction with negatively charged cell surfaces. These effects are greatly mitigated by the binding affinity of CPs to total organic carbon (TOC) in surface water. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127473DOI Listing

Quantitative proteomic analysis reveals the mechanisms of polymyxin B toxicity to Escherichia coli.

Chemosphere 2020 Jun 20;259:127449. Epub 2020 Jun 20.

School of Environment and Energy, South China University of Technology, Guangzhou, 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou, 510006, PR China; Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal, Guangzhou, 510006, PR China; Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, Guangzhou, 510006, PR China. Electronic address:

Polymyxin B is increasingly employed all over the world to treat patients who affected by multidrug-resistant Gram-negative bacteria. Although the mechanism of resistance to polymyxin B is well known, the metabolic role of bacteria in stress response to polymyxin B remains an important task and may help to better understand polymyxin B-related stress response. In this study, the proteome changes of Escherichia coli (E. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127449DOI Listing

Pentachlorophenol inhibits CatSper function to compromise progesterone's action on human sperm.

Chemosphere 2020 Jun 28;259:127493. Epub 2020 Jun 28.

Medical School, Institute of Reproductive Medicine, Nantong University, Nantong, 226019, PR China; Institute of Life Science, Nanchang University, Nanchang, 330031, PR China. Electronic address:

Pentachlorophenol (PCP), a highly toxic contaminant of chlorophenols, is common in a variety of environments and presents serious risks to animal and human health. However, the reproductive toxicity and potential actions of PCP have not been investigated thoroughly, especially in humans. Here, human spermatozoa were used to evaluate the effect of PCP on cell function and to explore the underlying mechanisms. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127493DOI Listing

Mineralization of Methyl Orange azo dye by processes based on HO electrogeneration at a 3D-like air-diffusion cathode.

Chemosphere 2020 Jun 23;259:127466. Epub 2020 Jun 23.

Departamento de Ingeniería Geomática e Hidráulica, Universidad de Guanajuato, Av. Juárez 77, Zona Centro, 36000, Guanajuato, Guanajuato, Mexico. Electronic address:

This work addresses the mineralization of the widely used Methyl Orange (MO) azo dye by technologies based on HO electrogeneration at a 3D-like air-diffusion cathode. These include two Fe-catalyzed processes such as electro-Fenton (EF) and photoelectro-Fenton (PEF). Bulk electrolyses were performed in a recirculation flow plant, in which the Eco-Cell filter-press electrochemical reactor was connected in series with a UVA photoreactor. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127466DOI Listing

Unraveling the impact of arsenic on the redox response of peanut plants inoculated with two different Bradyrhizobium sp. strains.

Chemosphere 2020 Jun 21;259:127410. Epub 2020 Jun 21.

Instituto de Investigaciones Agrobiotecnológicas - Consejo Nacional de Investigaciones Científicas y Técnicas (INIAB-CONICET), Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto (UNRC), Ruta 36, Km 601, X5800, Río Cuarto, Córdoba, Argentina. Electronic address:

Arsenic (As) can be present naturally in groundwater from peanut fields, constituting a serious problem, as roots can accumulate and mobilize the metalloid to their edible parts. Understanding the redox changes in the legume exposed to As may help to detect potential risks to human health and recognize tolerance mechanisms. Thirty-days old peanut plants inoculated with Bradyrhizobium sp. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127410DOI Listing

Assessment of reproductive and developmental effects of graphene oxide on Japanese medaka (Oryzias latipes).

Chemosphere 2020 Jun 22;259:127221. Epub 2020 Jun 22.

RCMI Center for Environmental Health, Jackson State University, Jackson, MS, 39217, USA. Electronic address:

Due to its unique properties, graphene oxide (GO) has potential for biomedical and electronic applications, however environmental contamination including aquatic ecosystem is inevitable. Moreover, potential risks of GO in aquatic life are inadequately explored. Present study was designed to evaluate GO as an endocrine disrupting chemical (EDC) using the model Japanese medaka (Oryzias latipes). Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127221DOI Listing

The role of organic matrices in the fate of hydrophobic pesticides: An outdoor stream mesocosm study.

Chemosphere 2020 Jun 20;259:127459. Epub 2020 Jun 20.

iES Landau, Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, 76829, Landau, Germany. Electronic address:

To assess potential aquatic pesticide risks, environmental monitoring strategies often focus on water and sediment. However, knowledge gaps with regard to the pollution status of organic matrices important for the structure and functioning of aquatic ecosystems do exist. The present study assessed the dissipation of the triazole fungicide tebuconazole (TEB; K = 5. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127459DOI Listing

Atmospheric particulate matter and potentially hazardous compounds around residential/road side soil in an urban area.

Chemosphere 2020 Jun 22;259:127453. Epub 2020 Jun 22.

Polymer Petroleum and Coal Chemistry Group, Materials Science and Technology Division, CSIR-North East Institute of Science and Technology, Jorhat, 785006, Assam, India; Academy of Scientific and Innovative Research, CSIR-NEIST Campus, Jorhat, 785006, India. Electronic address:

Exposure to ambient coarse and fine particulate matter (PM and PM) causes premature death worldwide due to the nature of their particle size. It contains potentially hazardous elements (PHEs) and polycyclic aromatic hydrocarbons (PAHs). This study aims to quantify the particulate matter (PM) loads on the surface of soil in twenty-five different locations including residential and roadside areas of an urban area in Northeast India. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127453DOI Listing

A comparison of variations in blocking mechanisms of membrane-fouling models for estimating flux during water treatment.

Chemosphere 2020 Jun 17;259:127328. Epub 2020 Jun 17.

Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763, Republic of Korea. Electronic address:

This study investigates five different fouling models and contributing factors in membrane-filtration blocking mechanisms in a constant-pressure mode. A polyvinylidene fluoride membrane was used to study the fouling effects of a complex mixture of foulants (a latex-bed suspension, soybean oil, and inorganics) on pristine and chemically cleaned membranes in the presence of humic acid. A significance ratio in linear regression results (p-value) was used to assess the contribution of fouling mechanism in each model. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127328DOI Listing

Biological treatment of non-biodegradable azo-dye enhanced by zero-valent iron (ZVI) pre-treatment.

Chemosphere 2020 Jun 22;259:127470. Epub 2020 Jun 22.

Research Center of Biochemical and Environmental Engineering, Department of Applied Chemistry, Toyo University, Kawagoe, Saitama, 350-8585, Japan. Electronic address:

Zero-valent iron (ZVI) pre-treatment in sequential strategy for removal of non-biodegradable azo-dye Orange II by activated-sludge was quantitatively examined. The decolorization and TOC (total organic carbon) removal of Orange II by ZVI pre-treatment were examined in the ranges of pH from 3 to 11 and ZVI dosage from 500 to 2000 mgL. While the decolorization was enhanced with decreasing pH and the optimal pH for decolorization was found at pH 3, the TOC removal rate at pH 3 remained at 22. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127470DOI Listing

Dual function of Lemna minor and Azolla pinnata as phytoremediator for Palm Oil Mill Effluent and as feedstock.

Chemosphere 2020 Jun 23;259:127468. Epub 2020 Jun 23.

Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi, Selangor, Malaysia. Electronic address:

In this study, two native duckweeds (Lemna minor and Azolla pinnata) were cultivated in Palm Oil Mill Effluent (POME) to extract nutrients from the effluent. Five grams of A. pinnata and 2 g of L. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127468DOI Listing

Fe-Al based nanocomposite reinforced hydrothermal carbon: Efficient and robust absorbent for anionic dyes.

Chemosphere 2020 Jun 22;259:127421. Epub 2020 Jun 22.

Centre for Nano & Material Science, JAIN University, Jain Global Campus, Bangalore, 562112, India; IMDEA Water Institute, Avenida Punto Com, 2, Parque Científico Tecnológico de La Universidad de Alcalá, Alcalá de Henares, 28805, Madrid, Spain. Electronic address:

Nanocomposites with ultrahigh adsorption capabilities are highly desired for efficient wastewater remediation. Unfortunately, most of the nanomaterial based adsorbents showing inevitable limitation such as leaching and agglomeration led to the emerging field of carbonaceous hybrid materials with nanocomposites. Herein, we demonstrated a simple and low-temperature hydrothermal assisted preparation of Fe-Al based nanocomposites immobilized using carbon spheres. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127421DOI Listing

Comparing the effect of triadimefon and its metabolite on male and female Xenopus laevis: Obstructed growth and gonad morphology.

Chemosphere 2020 Jun 17;259:127415. Epub 2020 Jun 17.

Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China. Electronic address:

Amphibians are the most endangered class of vertebrates. In this study, Xenopus laevis frogs were exposed to 0, 1 and 10 mg/L of triadimefon or triadimenol. After 14 or 28 days of exposure, high levels of triadimefon or triadimenol obstructed the growth of frogs. Read More

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http://dx.doi.org/10.1016/j.chemosphere.2020.127415DOI Listing