Adsorptive separation of toxic metals from aquatic environment using agro waste biochar: Application in electroplating industrial wastewater.
Abstract In this research, raw jujube seeds (RJS) treated with sulphuric acid followed by ultrasonic treatment such as ultrasonic assisted jujube seeds (UAJS) based biochar have been experimented as a viable material for treating Zn(II) and Pb(II) contaminated water. The adsorption ability of UAJS was compared with RJS through Langmuir adsorption capacity. The produced adsorbents were analysed by using BET surface area and thermogravimetric analyses. The removal kinetics, isotherms and thermodynamic behaviours of metal ions adsorption by UAJS were studied. Adsorption equilibrium data were analysed using various eq...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Gayathri R, Gopinath KP, Kumar PS Tags: Chemosphere Source Type: research
Analysis of the characteristics of phosphine production by anaerobic digestion based on microbial community dynamics, metabolic pathways, and isolation of the phosphate-reducing strain.
This study investigated the production of phosphine in anaerobic digestion, with results indicating that phosphine production mainly occurred during logarithmic microbial growth. Dehydrogenase and hydrogen promoted the production of phosphine, with a maximum phosphine concentration of 300 mg/m3. The abundance of Ruminococcaceae and Escherichia was observed to promote phosphine generation. The analysis of metabolic pathways based on the Kyoto Encyclopedia of Genes and Genomes (KEGG) and the MetaCyc pathway database revealed the highest relative abundance of replication and repair in genetic information processing; furt...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Fan Y, Niu X, Zhang D, Lin Z, Fu M, Zhou S Tags: Chemosphere Source Type: research
The remediation of sulfonamides from the environment by Pleurotus eryngii mycelium. Efficiency, products and mechanisms of mycodegradation.
The objective of the study was to assess the applicability of the mycelium obtained from the in vitro cultures of nontoxic bracket fungus, Pleurotus eryngii, to sulfonamides mycodegradation. Samples containing one of the six selected sulfonamides, sulfanilamide derivatives, were incubated with the mycelium of P. eryngii for 7 and 14 days in vitro. Subsequently, change in the sulfonamide concentration was assessed in the samples using the UPLC-QTof. The transformation products were identified based on monoisotopic molecular mass and fragmentation spectra. The studied sulfonamides did not inhibit the growth of...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Baran W, Adamek E, Włodarczyk A, Lazur J, Opoka W, Muszyńska B Tags: Chemosphere Source Type: research
Formation and transformation of manganese(III) intermediates in the photochemical generation of manganese(IV) oxide minerals.
Abstract As important natural oxidants and adsorbents, manganese (Mn) oxide minerals affect the speciation, bioavailability and fate of pollutants and nutrient elements. It was found that birnessite-type Mn(IV) oxide minerals can be formed in the presence of NO3- and solar irradiation. However, the photochemical formation and transformation processes from Mn2+ to Mn(IV) oxide minerals remain unclear. In this work, the Mn(IV) oxide minerals were confirmed to be photochemically formed mainly due to the disproportionation of Mn(III) intermediates generated from the oxidation of Mn2+ in the presence of NO3- under UV l...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Zhang T, Liu L, Tan W, Suib SL, Qiu G Tags: Chemosphere Source Type: research
Mercury bioaccumulation in stream fish from an agriculturally-dominated watershed.
In this study, we assessed mercury in fish from four tributaries to the Red Deer River, Alberta, Canada, which are characterized by high surface water mercury concentrations. We used carbon (δ13C) and nitrogen (δ15N) stable isotopes to examine relationships between fish total mercury (THg) concentrations, food web dynamics and patterns in unfiltered THg and methylmercury (MeHg) concentrations. We found that THg concentrations exceeded the tissue residue quality guideline for the protection of wildlife consumers in 99.7% of fish sampled. However, while the surface water THg concentration was highest in Michichi ...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Donadt C, Cooke CA, Graydon JA, Poesch MS Tags: Chemosphere Source Type: research
Developmental neurotoxicity of low concentrations of bisphenol A and S exposure in zebrafish.
Abstract The vulnerability to environmental insults is heightened at early stages of development. However, the neurotoxic potential of bisphenol A (BPA) and bisphenol S (BPS) at developmental windows remains unclear. To investigate the mechanisms mediating the developmental neurotoxicity, zebrafish embryos were treated with 0.01, 0.03, 0.01, 0.3, 1 μM BPA/BPS. Also, we used Tg(HuC:GFP) zebrafish to investigate whether BPA/BPS could induce neuron development. The reduction in body length, and increased heart rate were significant in 0.3 and 1 μM BPA/BPS groups. The green fluorescence protein (GFP) i...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Gyimah E, Xu H, Dong X, Qiu X, Zhang Z, Bu Y, Akoto O Tags: Chemosphere Source Type: research
Evaluation of a recirculating hydroponic bed bioreactor for removal of contaminants of emerging concern from tertiary-treated wastewater effluent.
Abstract Tertiary-treated effluent from a municipal wastewater treatment plant in Tucson, AZ, was added to recirculating hydroponic bed bioreactors filled with light expanded clay aggregate (LECA) and recirculated for 10 days. Bioreactors were planted with high and low densities of sorghum (Sorghum bicolor), switchgrass (Panicum virgatum) and Bacillus thuringiensis cotton (Gossypium sp.). The experiment also included a non-planted bioreactor treatment and a control bioreactor with neither plants nor substrate medium. Of 46 contaminants of emerging conern assayed with liquid chromatography tandem mass spectrometry ...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Recsetar MS, Fitzsimmons KM, Cuello JL, Hoppe-Jones C, Snyder SA Tags: Chemosphere Source Type: research
Comprehensive study of insecticides in atmospheric particulate matter in Hanoi, Vietnam: Occurrences and human risk assessment.
Abstract Air pollution is the most serious environmental issue in Vietnam, particularly in big cities. Air pollutants that are set as environmental standards are regularly monitored by the public institutions. Whereas, environmental data on organic micro-pollutants in atmospheric particulate matters (APMs) is limited, including PAHs and POPs. Although massive pesticides are used in big cities, their data in APMs in Vietnam is very scarce. In order to elucidate their occurrence in the ambient air in Hanoi and their health effects, we surveyed 107 insecticides in APMs by a novel target screening method using LC-QTOF...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Doan NH, Duong HT, Trinh HT, Tanaka Y, Kadokami K Tags: Chemosphere Source Type: research
Effect of high hydrostatic pressure-assisted pectinase modification on the Pb2+ adsorption capacity of pectin isolated from sweet potato residue.
Abstract Novel pectin derived from sweet potato residue was modified by high hydrostatic pressure (HHP)-assisted pectinase and then used for Pb2+ removal from aqueous solutions. The removal characteristics and mechanisms were also investigated. Results showed that modified sweet potato pectin exhibited greater adsorption performances for Pb2+ than that of natural ones, and showed excellent eco-friendly properties and good potential for adsorption of some other heavy metals (such as Cu2+). The adsorption curves were much more conformed to Langmuir model, and the highest capacity for Pb2+ adsorption was 263.15 ...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Mudugamuwa Arachchige MP, Mu T, Ma M Tags: Chemosphere Source Type: research
Preparation of CeO2-doped carbon nanotubes cathode and its mechanism for advanced treatment of pig farm wastewater.
Abstract The effluent from conventional treatment process (including anaerobic digestion and anoxic-oxic treatment) for pig farm wastewater was difficult to treat due to its low ratio of biochemical oxygen demand to chemical oxygen demand (BOD5/CODCr) (
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Kuang C, Xu Y, Xie G, Pan Z, Zheng L, Lai W, Ling J, Talawar M, Zhou X Tags: Chemosphere Source Type: research
Effects of hydroxyl, carboxyl, and amino functionalized carbon nanotubes on the functional diversity of microbial community in riverine sediment.
In this study, the metabolic function of sediment microbial community was investigated after unfunctionalized or functionalized multi-walled carbon nanotubes (MWCNTs) were incorporated. The surface functional groups on the studied functionalized MWCNTs in this work were hydroxyl, carboxyl, and amino, respectively. The metabolic functional diversity was determined by Biolog EcoPlates after one-month exposure to MWCNTs. Incorporating 0.5 wt% amino functionalized MWCNTs significantly decreased the microbial activity and diversity, and all types of MWCNTs caused great inhibition on the microbial metabolism at the dosage o...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Song B, Zeng Z, Zeng G, Gong J, Xiao R, Chen M, Tang X, Ye S, Shen M Tags: Chemosphere Source Type: research
WS2 as highly active co-catalyst for the regeneration of Fe(II) in the advanced oxidation processes.
Abstract The greatest constraint in the advanced oxidation processes involved Fe(II)/PMS was the low utilization of Fe(II) and PMS. In the present study, the co-catalytic effect of WS2 on the Fe(II)/PMS system for the degradation of organics was investigated. In the presence of WS2, Fe(III) was reduced to Fe(II) during the reaction and resulted in improved decomposition of PMS as well as the degradation of 4-chloriphenol (4-CP). The decomposition rate of PMS and degradation efficiency of 4-CP were 10% and 25% in the Fe(II)/PMS process, while the efficiencies respectively increased to 99% and 100% in the WS2 assist...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Luo H, Zhou X, Guo X, Fang Z, Chen Q, Zhou J Tags: Chemosphere Source Type: research
Polymer-assisted modification of metal-organic framework MIL-96 (Al): influence of HPAM concentration on particle size, crystal morphology and removal of harmful environmental pollutant PFOA.
Abstract A new synthesis method was developed to prepare an aluminum-based metal organic framework (MIL-96) with a larger particle size and different crystal habits. A low cost and water-soluble polymer, hydrolyzed polyacrylamide (HPAM), was added in varying quantities into the synthesis reaction to achieve>200% particle size enlargement with controlled crystal morphology. The modified adsorbent, MIL-96-RHPAM2, was systematically characterized by SEM, XRD, FTIR, BET and TGA-MS. Using activated carbon (AC) as a reference adsorbent, the effectiveness of MIL-96-RHPAM2 for perfluorooctanoic acid (PFOA) removal from...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Mohd Azmi LH, Williams DR, Ladewig BP Tags: Chemosphere Source Type: research
Evolution of extracellular polymeric substances (EPS) in aerobic sludge granulation: Composition, adherence and viscoelastic properties.
In this study, we set up two reactors fed with COD/N ratios of 100: 5 (R1) and 100: 10 (R2) for comparison, to investigate the adhesive and viscoelastic properties of sludge EPS during the sludge granulation. We found that R2 showed a more rapid sludge granulation with more stable granules formed, contained a higher abundance of amoA gene, and had a higher production of polysaccharides than R1. We also found a sharp decrease in polysaccharide production and β-sheets abundance accompanied by granule size decrease in R1 on Day 80, indicating their essential roles in sludge granulation and granule stability. QCM-D (quart...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Shi Y, Liu Y Tags: Chemosphere Source Type: research
Untargeted metabolomics for Achilles heel of engineered nanomaterials' risk assessment.
Abstract Owing to the superlative properties, engineered nanomaterials (ENM) are being used in food, cosmetics, medicine, and electronics. Therefore, exogenous ENM can be housed into humans through a multitude of exposure routes, leading to compromise of the biomolecules' functionalities through structural deformations, and even at the metabolic level. Consequently, it is of great importance to understand the perturbations introduced at the metabolic level for the timely risk assessment (RA) of ENM. Current technological advancements in metabolomics empower us to visualize the metabolic dysregulations in biologica...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Ahmad F, Abubshait SA, Abubshait HA Tags: Chemosphere Source Type: research
Dietary exposure assessment of methylmercury and polyunsaturated fatty acids in saltwater fish and processed foods among Taiwanese women of child-bearing age and children: A novel core food-matching approach.
Abstract Saltwater fish is rich in health-promoting polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Excessive fish intake may also cause health hazards due to methylmercury (MeHg). A novel dose estimation method was proposed in this study to improve the quality of food matching by considering the usage ratio of cooking and processing methods in sampling design. In total, 39 table-ready samples were specified according to 2-3 common cooking methods, and MeHg and total mercury (THg) were analyzed. The results showed that mercury was detected in 20 samples (LOD =&n...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Chang CH, Chiang CF, Liao JW, Yen GC, Huang YC, Ni SP, Chang CC, Lin HT Tags: Chemosphere Source Type: research
Microplastics in wastewater outlets of Bandar Abbas city (Iran): A potential point source of microplastics into the Persian Gulf.
This study is the first attempt to quantify MPs released from the wastewater outfall from Bandar Abbas City into the Persian Gulf. Two wastewater discharge stations at Gursuzan and Suru were sampled. MPs were isolated by an oxidative procedure and subsequent density separation using ZnCl2 solution. The average MP concentration in wastewater and sludge were 70.66 (±14.12, SD) MP.35 L-1 and 6070 (±807.25) MPs.kg-1, respectively at Confidence Level (CL) (95.0%). The most commonly recovered polymers were polyethylene (PE) and polypropylene (PP) in all size classes. Our findings provides a baseline of MP conc...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Naji A, Azadkhah S, Farahani H, Uddin S, Khan FR Tags: Chemosphere Source Type: research
Efficient removal of norfloxacin in water using magnetic molecularly imprinted polymer.
Abstract Effective and practical materials are important for the pollution control in the environment. A novel magnetic molecularly imprinted polymer (CoFe2O4@TiO2-MMIP) was prepared based on the surface molecular imprinting technology combined with photocatalytic degradation and magnetic separation. The adsorption rate constant and maximum adsorption capacity of CoFe2O4@TiO2-MMIP are 0.21 g mg-1 min-1 and 14.26 mg g-1, respectively. The effects of experimental factors on the adsorption properties of the magnetic molecularly imprinted polymer were investigated. CoFe2O4@TiO2-MMIP had selective a...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Fang L, Miao Y, Wei D, Zhang Y, Zhou Y Tags: Chemosphere Source Type: research
Catalysis of rGO-WO3 nanocomposite for aqueous bisphenol A degradation in dielectric barrier discharge plasma oxidation process.
Abstract Due to the multi-catalysis of the WO3 and excellent properties of the graphene (GO), a series of rGO-WO3 nanocomposites were prepared through the hydrothermal synthesis procedure by changing the material ratio, the reaction temperature and the reaction time in this paper, and then added it into a dielectric barrier discharge plasma (DBDP) system for investigating the bisphenol A (BPA)'s degradation and corresponding catalytic mechanism of the rGO-WO3 in the DBDP system. The obtained results show that there was an optimum dosage of the rGO-WO3 (40 mg/L) as well as the preparation conditions (5:1000 ma...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Mao D, Yan X, Wang H, Shen Z, Yi C Tags: Chemosphere Source Type: research
Impact of exposure to ambient air pollutants on the admission rate of hospitals for asthma disease in Shiraz, southern Iran.
Abstract Asthma is a common chronic respiratory disease in the world. Short-term exposure to ambient air pollutants is closely related to acute respiratory diseases and asthmatic symptoms. The purpose of this research was to estimate the correlation between exposure to three air pollutants (O3, NO2, and SO2) and hospital admission because of asthmatic disease (HAAD) in the city of Shiraz, southern Iran. The data were collected from the two real-time monitoring stations located in this city. The acquired information was used for developing predictive models by the AirQ software. The findings of this study were repo...
Source: Chemosphere - November 28, 2020 Category: Chemistry Authors: Bonyadi Z, Arfaeinia H, Fouladvand M, Farjadfard S, Omidvar M, Ramavandi B Tags: Chemosphere Source Type: research
Testing the Validity of the Miscible-Displacement Interfacial Tracer Method for Measuring Air-Water Interfacial Area: Independent Benchmarking and Mathematical Modeling.
Abstract The interfacial tracer test (ITT) conducted via aqueous miscible-displacement column experiments is one of a few methods available to measure air-water interfacial areas for porous media. The primary objective of this study was to examine the robustness of air-water interfacial area measurements obtained with interfacial tracer tests, and to examine the overall validity of the method. The potential occurrence and impact of surfactant-induced flow was investigated, as was measurement replication. The column and the effluent samples were weighed during the tests to monitor for potential changes in water sat...
Source: Chemosphere - November 25, 2020 Category: Chemistry Authors: El Ouni A, Guo B, Zhong H, Brusseau ML Tags: Chemosphere Source Type: research
Spatial distribution of fine and coarse particulate matter during a southwest monsoon in Peninsular Malaysia.
This study aimed to determine the spatial distribution of PM2.5 and PM10 collected in four regions (North, Central, South and East Coast) of Peninsular Malaysia during the southwest monsoon. Concurrent measurements of PM2.5 and PM10 were performed using a high volume sampler (HVS) for 24 h (August to September 2018) collecting a total of 104 samples. All samples were then analysed for water soluble inorganic ions (WSII) using ion chromatography, trace metals using inductively coupled plasma-mass spectroscopy (ICP-MS) and polycyclic aromatic hydrocarbon (PAHs) using gas chromatography-mass spectroscopy (GC-MS). The res...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Othman M, Latif MT, Jamhari AA, Abd Hamid HH, Uning R, Khan MF, Mohd Nadzir MS, Sahani M, Abdul Wahab MI, Chan KM Tags: Chemosphere Source Type: research
Impact of multiple drying and rewetting events on biochar amendments for Hg stabilization in floodplain soil from South River, VA.
This study evaluated two selected biochars anaerobic digestate (DIG) and sulfurized hardwood (MOAK)) as potential amendment materials in moderately reduced floodplain soil under repeated drying and rewetting events using a modified humidity cell protocol. Enhanced release of filter-passing (0.45-μm) total Hg (THg) and MeHg was observed at early times. Elevated concentrations of 0.45-μm THg were associated with DOC and Mn in sediment control and biochar-amended systems. Elevated concentrations of MeHg were associated with Mn in the MOAK-amended system. Thereafter, decreases in 0.45-μm (up to 57%) and unfiltered THg...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Wang AO, Ptacek CJ, Mack EE, Blowes DW Tags: Chemosphere Source Type: research
Distribution characteristics and potential risks of heavy metals and antimicrobial resistant Escherichia coli in dairy farm wastewater in Tai'an, China.
In this study, the heavy metal pollution status of livestock breeding water bodies in the Dawen river basin of Shandong Province in China was evaluated, and a total of 10 heavy metals were measured. In addition, antimicrobial susceptibility tests were conducted for Escherichia coli strains isolated from the water samples. The results showed that among all the metals, copper, zinc, and iron were detected at each sampling point, followed by nickel (detection rate of 95.74%), arsenic (detection rate of 89.36%), selenium (detection rate of 68.09%), lead (detection rate of 27.66%), and mercury (detection rate of 12.77%). Cadmiu...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Liu C, Liu Y, Feng C, Wang P, Yu L, Liu D, Sun S, Wang F Tags: Chemosphere Source Type: research
Nanoplastic occurrence in a soil amended with plastic debris.
Abstract While several studies have investigated the potential impact of nanoplastics, proof of their occurrence in our global environment has not yet been demonstrated. In the present work, by developing an innovative analytical strategy, the presence of nanoplastics in soil was identified for the first time. Our results demonstrate the presence of nanoplastics with a size ranging from 20 to 150 nm and covering three of the most common plastic families: polyethylene, polystyrene and polyvinyl chloride. Given the amount of organic matter in the soil matrix, the discrimination and identification of large nanop...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Wahl A, Le Juge C, Davranche M, El Hadri H, Grassl B, Reynaud S, Gigault J Tags: Chemosphere Source Type: research
Biogenic secondary organic aerosols: A review on formation mechanism, analytical challenges and environmental impacts.
Abstract The review initiates with current state of information on the atmospheric reaction mechanism of biogenic volatile organic compounds (BVOCs) and its fate in the atmosphere. The plants release BVOCs, i.e., isoprene, monoterpenes, and sesquiterpenes, which form secondary organic aerosols (SOA) upon oxidation. These oxidation reactions are primarily influenced by solar radiations along with other meteorological parameters viz.; temperature and relative humidity, therefore, the chemistry behind SOA formation is different during day than the night time. The review throws light upon the day and nighttime formati...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Mahilang M, Deb MK, Pervez S Tags: Chemosphere Source Type: research
After remediation - Using toxicity identification evaluation of sediment contamination in the subtropical Erren river basin.
In conclusion, a TIE approach was successful in demarcating most effective contaminant groups (ammonia, heavy metals, and non-polar organic compounds) in whole-sediment cores, their porewaters and potential toxicities from a highly polluted river after remediation in southern Taiwan to an invertebrate animal model H. azteca. PMID: 32799140 [PubMed - indexed for MEDLINE] (Source: Chemosphere)
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Wang BR, Dahms HU, Wu MC, Jhuo NJ, Hsieh CY Tags: Chemosphere Source Type: research
Leaching behavior and transformation of total mercury and methylmercury from raw and lime-conditioned sewage sludge under simulated rain.
This study provides a better understanding of the release and biogeochemical transformations of Hg in MSS. PMID: 32799141 [PubMed - indexed for MEDLINE] (Source: Chemosphere)
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Wang J, Jiang Y, Zhang C, Zhang Y, Huang D, Yan S, Sun T, Mao Y, Cai Y Tags: Chemosphere Source Type: research
Toxic mechanism of three azole fungicides and their mixture to green alga Chlorella pyrenoidosa.
In this study, three common azole fungicides, namely, myclobutanil (MYC), propiconazole (PRO), and tebuconazole (TCZ), were used in studying the toxic mechanisms of a single substance and its ternary mixture exposed to ambient concentrations of Chlorella pyrenoidosa. Superoxide dismutase (SOD), catalase (CAT), chlorophyll a (Chla), and total protein (TP), were used as physiological indexes. Results showed that three azole fungicides and ternary mixture presented obvious time-dependent toxicities at high concentrations. MYC induced a hormetic effect on algal growth, whereas PRO and TCZ inhibit algal growth in the entire ran...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Nong QY, Liu YA, Qin LT, Liu M, Mo LY, Liang YP, Zeng HH Tags: Chemosphere Source Type: research
Plant metal concentrations in Theobroma cacao as affected by soil metal availability in different soil types.
In this study eight metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn) were investigated in 12 soil subgroups belonging to four soil orders across 15 locations in Trinidad, with the aim to investigate the effect of soil metal diversity and concentration on metal bioaccumulation in cacao. Soil metals were extracted using five methods (aqua regia, DTPA, Mehlich 3, nitric acid, and water). Cacao leaf metal concentrations were determined using the USEPA 3052 method. Metal extraction efficiency ranged between methods with aqua regia ≥ nitric acid > Mehlich 3 ≥ DTPA ≥ water across all...
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Lewis C, Lennon AM, Eudoxie G, Sivapatham P, Umaharan P Tags: Chemosphere Source Type: research
Gestational exposure to tebuconazole affects the development of rat fetal Leydig cells.
In conclusion, in utero exposure of tebuconazole causes the proliferation of fetal Leydig cells. PMID: 32805656 [PubMed - indexed for MEDLINE] (Source: Chemosphere)
Source: Chemosphere - November 22, 2020 Category: Chemistry Authors: Ma F, Li Y, Yu Y, Li Z, Lin L, Chen Q, Xu Q, Pan P, Wang Y, Ge RS Tags: Chemosphere Source Type: research
Retraction notice to "Preparation of molecularly imprinted metal-organic frameworks for the selective removal of norfloxacin by an in-situ self-assembly template strategy" [Chemosphere 262 (2021) 127832].
Retraction notice to "Preparation of molecularly imprinted metal-organic frameworks for the selective removal of norfloxacin by an in-situ self-assembly template strategy" [Chemosphere 262 (2021) 127832]. Chemosphere. 2021 Jan;262:128260 Authors: Liu Z, Chen G, Hu F, Lu X PMID: 33167189 [PubMed] (Source: Chemosphere)
Source: Chemosphere - November 12, 2020 Category: Chemistry Authors: Liu Z, Chen G, Hu F, Lu X Tags: Chemosphere Source Type: research
Fifteen-year trends in carbon species and PM2.5 in Seoul, South Korea (2003-2017).
This study focused on particulate matter (PM2.5) and carbon species in Seoul, South Korea, to quantitatively evaluate their long-term trends and assess the main correlating factors. Ambient PM2.5 samples were collected over a 24 h period every third or sixth day from March 2003 to December 2017. The mean concentrations of PM2.5, organic carbon (OC), elemental carbon (EC), primary and secondary OC (POC and SOC) in Seoul over 15 years were 32.2 μg/m3 and 7.28 μg/m3, 1.85 μg/m3, 4.29 μg/m3 and 3.54 μg/m3 respectively. The long-term concentration trends in PM2.5, OC, EC, POC, and SO...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Kim Y, Yi SM, Heo J Tags: Chemosphere Source Type: research
Seasonal performance assessment of four riverbank filtration sites by combined non-target and effect-directed analysis.
n C Abstract Targeting the most relevant organic micropollutants (OMP) in routine analysis appears difficult due to formation of transformation products of unknown concentration or toxicity. Performance assessment of water purification processes is still based upon limited target data. Therefore, we broadened the assessment of the removal efficiencies with combined non-target and effect-directed analysis at four riverbank filtration (RBF) sites in Germany. To assess micropollutant elimination, constancy and formation during different seasons, considering local redox conditions, travel distances and total component...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Oberleitner D, Stütz L, Schulz W, Bergmann A, Achten C Tags: Chemosphere Source Type: research
Heterogeneously activation of H2O2 and persulfate with goethite for bisphenol A degradation: A mechanistic study.
Abstract Advanced oxidation processes (AOPs) based on the activation of hydrogen peroxide (H2O2) and persulfate (PS) by minerals have received increasing interest for environmental remediation. Herein, H2O2 and PS activation systems employing goethite as a catalyst were discovered for the rapid degradation of BPA with the generation of reactive oxidation species (ROS) and for the reduction of total organic carbon (TOC) in aqueous solutions. The morphology of goethite were characterized by XRD, SEM, BET, TEM, etc. As a result, the oxidant efficiency of the goethite/H2O2 system (75.9%) was higher than that of the go...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Ding J, Shen L, Yan R, Lu S, Zhang Y, Zhang X, Zhang H Tags: Chemosphere Source Type: research
Organochlorine pesticides and polychlorinated biphenyls in common kestrel eggs from the Canary Islands: Spatiotemporal variations and effects on eggshell and reproduction.
Abstract Organochlorine (OC) pesticides were widely used on the Canary Islands (Spain) for intensive crop production and against plagues of African locust. A previous study performed in 1988-1994 showed a high concentration of p,p'-DDE in the eggs of common kestrels (Falco tinnunculus) from the island of Tenerife. The present study shows OC pesticide and polychlorinated biphenyl (PCBs) levels in 40 unhatched common kestrel eggs collected from southern Tenerife between 2009 and 2016. The protoporphyrin IX in eggshells has also been analysed in order to explore the use of this pigment as a biomarker. Egg biometry, s...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Buck A, Carrillo-Hidalgo J, Camarero PR, Mateo R Tags: Chemosphere Source Type: research
Age differences in the pulmonary and vascular pathophysiologic processes after long-term real-time exposure to particulate matter in rats.
In conclusion, ambient PM2.5 and PM10 exposure induced particulate matter to accumulate in the body, caused severe pulmonary and vascular disorders, and demonstrated age-associated differences. PMID: 32721691 [PubMed - indexed for MEDLINE] (Source: Chemosphere)
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Xiao X, Yao T, Du S, Zhang J, Huang T, Lei Y, Cao L, Shen Z, Cao Y Tags: Chemosphere Source Type: research
A novel water-stable two-dimensional zeolitic imidazolate frameworks thin-film composite membrane for enhancements in water permeability and nanofiltration performance.
Abstract Polymer membranes for water treatment are constrained by the permeability-separation trade-off. Herein, two-dimensional (2D) zeolitic imidazolate frameworks (ZIFs) made of benzimidazole interconnected with Zn ions are used to create 2D Zn2(Bim)4 molecular sieve nanosheets, which is explored as an asymmetric, thin-film composite (TFC) nanofiltration (NF) membrane for removing organic dyes and salts from water with a high water permeability under a low operating pressure (1 bar). The 2D Zn2(Bim)4 TFC NF membrane is synthesized via ionic bonds between polycations and the peripheral hydroxy groups of 2D ...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Li T, Ren Y, Wu D, Zhang W, Shi M, Ji C, Lv L, Hua M, Zhang W Tags: Chemosphere Source Type: research
Respiration, predatory behavior and prey consumption by Podisus nigrispinus (Heteroptera: Pentatomidae) nymphs exposed to some insecticides.
The objective of the present study was to evaluate the side-effects of Bacillus thuringiensis (Bt), permethrin, tebufenozide and thiamethoxam on third instar nymphs of the predator P. nigrispinus in the laboratory. The toxicity of insecticides for this insect was determined by estimating their lethal concentrations. Podisus nigrispinus behavior after exposure to insecticides was analyzed using a video tracking system and the respiratory rate with a respirometer. Prey/nymph consumption was assessed after 24 h of starvation. The preference of P. nigrispinus nymphs, for prey treated or not with the insecticides...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Silva WM, Martínez LC, Plata-Rueda A, Serrão JE, Zanuncio JC Tags: Chemosphere Source Type: research
Evaluating the environmental impact of contaminated sediment column stabilized by deep cement mixing.
Abstract Deep cement mixing (DCM) method is a widely used geotechnical technique for increasing ground stabilization before construction works. However, the environmental influence of stabilized ground on the surrounding area remains a concern. A physical model experiment of DCM-treated sediment column was conducted to investigate both geotechnical and environmental effects on the surrounding sediment. The DCM column contained the cement-stabilized contaminated sediment and surrounded by uncontaminated sediment. The physical behaviour, including settlement, pore water pressure, and total pressure were measured und...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Ho TO, Tsang DCW, Chen WB, Yin JH Tags: Chemosphere Source Type: research
Cadmium mobility in three contaminated soils amended with different additives as evaluated by dynamic flow-through experiments.
This study has strong implications in understanding the role of different amendments in controlling the fate, leaching behavior and immobilization of Cd in diverse soil types. PMID: 32721697 [PubMed - indexed for MEDLINE] (Source: Chemosphere)
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Hamid Y, Tang L, Hussain B, Usman M, Liu L, Cao X, Ulhassan Z, Bilal Khan M, Yang X Tags: Chemosphere Source Type: research
Novel insights into the roles of RNA N6-methyladenosine modification in regulating gene expression during environmental exposures.
Abstract N6-methyladenosine (m6A) is one of the most common RNA modifications in eukaryotes involved in the regulation of post-transcriptional gene expression, as well as the occurrence and development of diseases related to environmental exposures. Adverse factors produced by environmental exposures, such as reactive oxygen species, inflammation, and cyclobutane pyrimidine dimers, mediate m6A modification, thereby regulating downstream gene and protein expression, and signaling pathways, such as FTO/m6A RNA/p53 axis, PI3K/AKT/mTOR pathway, and PARP/METTL3/m6A RNA/Pol κ pathway. Moreover, an imbalance in m6A...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Li D, Zhu X, Li Y, Zeng X Tags: Chemosphere Source Type: research
Tetrabromobisphenol A, terabromobisphenol S and other bromophenolic flame retardants cause cytotoxic effects and induce oxidative stress in human peripheral blood mononuclear cells (in vitro study).
Tetrabromobisphenol A, terabromobisphenol S and other bromophenolic flame retardants cause cytotoxic effects and induce oxidative stress in human peripheral blood mononuclear cells (in vitro study). Chemosphere. 2020 Dec;261:127705 Authors: Włuka A, Woźniak A, Woźniak E, Michałowicz J Abstract Brominated flame retardants (BFRs) are the compounds used in the industry in order to decrease flammability of various everyday products. The use of BFRs leads to migration of these substances into the environment, which results in the exposure of humans to their action. Although BFRs are widespread in ...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Włuka A, Woźniak A, Woźniak E, Michałowicz J Tags: Chemosphere Source Type: research
Acute and chronic combined effect of polystyrene microplastics and dibutyl phthalate on the marine copepod Tigriopus japonicus.
In this study, the marine copepod Tigriopus japonicus was applied to study the combined effect of DBP and polystyrene microplastics (mPS) on the copepod through both acute mortality tests and chronic reproduction tests. The LC50 of DBP was 1.23 mg L-1 (95% CI: 1.11-1.35 mg L-1), while exposure to mPS didn't have significant lethal effect on the copepods. Adsorption to MPs led to decreased bioavailability of DBP, resulting in decreased toxicity of DBP. In contrast to the results of acute toxicity tests, DBP didn't affect the reproduction of the copepods at lower exposure concentrations, while mPS reduced...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Li Z, Zhou H, Liu Y, Zhan J, Li W, Yang K, Yi X Tags: Chemosphere Source Type: research
Butanolide alleviated cadmium stress by improving plant growth, photosynthetic parameters and antioxidant defense system of brassica oleracea.
Abstract Current study was performed to explore the effect of butanolide (KAR1) in mitigation of cadmium (Cd) induced toxicity in Brussels sprout (Brassica oleracea L.). Brussels sprout seeds, treated with 10-5 M, 10-7 M and 10-10 M solution of KAR1 were allowed to grow in Cd-contaminated (5 mg L-1) regimes for 25 d. Cadmium toxicity decreased seed germination and growth in B. oleracea seedlings. Elevated intensity of electrolyte leakage (EL), malondialdehyde (MDA) and hydrogen peroxide (H2O2) were observed in Cd-stressed seedlings. Additionally, reduced level of stomatal conductivity...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Shah AA, Khan WU, Yasin NA, Akram W, Ahmad A, Abbas M, Ali A, Safdar MN Tags: Chemosphere Source Type: research
ZnO nanorod arrays assembled on activated carbon fibers for photocatalytic degradation: Characteristics and synergistic effects.
Abstract Well-aligned ZnO nanorod arrays were assembled on activated carbon fibers by a stepwise sequence of sol-gel and hydrothermal synthesis methods. These ZnO nanorod arrays on activated carbon fibers having different characteristics such as surface area, rod concentration, aspect ratio and defect level, were applied as catalysts for the photodegradation of an aqueous methylene blue solution. They showed very promising methylene blue adsorbility in the dark (ca. 0.025-0.031 mg methylene blue m-2 catalyst, vs. 0.072 mg methylene blue m-2 activated carbon fibers). Significantly, the defect level of ZnO...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Luo S, Liu C, Zhou S, Li W, Ma C, Liu S, Yin W, Heeres HJ, Zheng W, Seshan K, He S Tags: Chemosphere Source Type: research
Factors affecting in situ analysis of total petroleum hydrocarbons in contaminated soils by using a mid-infrared diffuse reflectance spectroscopy.
Abstract The hand-held mid-infrared diffuse reflectance infrared Fourier transform (MIR-DRIFT) spectrometer was used to assess the applicability of on-site and real time monitoring of total petroleum hydrocarbons (TPH) in contaminated soils during site characterization and remediation. Field measurement devices (MIR-DRIFT and turbidimetric screening test kits) were used to analyze reference soils with concentration ranging from 713 to 54790 mg/kg and compared with the results by a gas chromatography/mass spectrometry method (GC/MS). In situ field measurement of 147 petroleum-contaminated soil samples from 11 ...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Chen CS, Tien CJ Tags: Chemosphere Source Type: research
Comet assay protocol for Bombus atratus fat body and pericardial cells (Hymenoptera, bombini) at a safe concentration of mercury.
Abstract The decline of the Bombus population is closely related to the presence of environmental pollutants. Among these pollutants, trace metals represent a major concern, which includes mercury, a known genotoxic substance. The induction of genotoxicity may be demonstrated by the comet assay (a.k.a. single-cell gel electrophoresis), a simple and sensitive method for DNA damage estimating. The current work provided, for the first time, a protocol of comet assay for Bombus atratus using mercury as a standard chemical at safe concentrations according to the Environment National Council of Brazil, and the World Hea...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Ceschi-Bertoli L, Vidal FAP, Balsamo PJ, Abdalla FC Tags: Chemosphere Source Type: research
The FDA-approved drugs ticlopidine, sertaconazole, and dexlansoprazole can cause morphological changes in C. elegans.
The FDA-approved drugs ticlopidine, sertaconazole, and dexlansoprazole can cause morphological changes in C. elegans. Chemosphere. 2020 Dec;261:127756 Authors: Galford KF, Jose AM Abstract Urgent need for treatments limit studies of therapeutic drugs before approval by regulatory agencies. Analyses of drugs after approval can therefore improve our understanding of their mechanism of action and enable better therapies. We screened a library of 1443 Food and Drug Administration (FDA)-approved drugs using a simple assay in the nematode C. elegans and found three compounds that caused morphologi...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Galford KF, Jose AM Tags: Chemosphere Source Type: research
Simultaneous photocatalytic degradation of ibuprofen and H2 evolution over Au/sheaf-like TiO2 mesocrystals.
In this study, we demonstrated the simultaneous hydrogen production and ibuprofen degradation through heterogeneous photocatalysis. By anchoring Au nanoparticles (NPs) on the (101) surface of sheaf-like TiO2 mesocrystals with  orientation, efficient charge separation is achieved, which is essential for the photocatalytic redox reactions. XPS analysis showed that the binding energies of Ti 2p and O 1s indicated no shift after Au addition. Peaks observed at 81.8 and 85.5 eV due to Au 4f7/2 and Au 4f5/2 of metallic gold on the surface of Au/meso-TiO2, confirmed the formation of Au NPs. The as-synthesized anatase TiO...
Source: Chemosphere - November 6, 2020 Category: Chemistry Authors: Yao X, Hu X, Liu Y, Wang X, Hong X, Chen X, Pillai SC, Dionysiou DD, Wang D Tags: Chemosphere Source Type: research