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Chemosphere

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https://www.readbyqxmd.com/read/29153330/corrigendum-to-interactions-between-three-typical-endocrine-disrupting-chemicals-edcs-in-binary-mixtures-exposure-on-myocardial-differentiation-of-mouse-embryonic-stem-cell-chemosphere-178-2017-378-383
#1
Zhou Ren, Wei Cheng, Yan Feng, Hongying Wei, Fan Liang, Yan Wang
No abstract text is available yet for this article.
November 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/29156335/thyroid-disruption-and-reduced-mental-development-in-children-from-an-informal-e-waste-recycling-area-a-mediation-analysis
#2
Lian Liu, Bo Zhang, Kun Lin, Yuling Zhang, Xijin Xu, Xia Huo
This paper aims to evaluate the effects of thyroid disruption on the mental development of children. A total of 258 three-year-old children in Guiyu (e-waste-exposed group) and Nanao (reference group), China were examined. FT3, FT4, TSH, lead (BPb) and cadmium (BCd) in blood were determined, and cognitive and language scores of children were assessed based on the Bayley Scales of Infant Development III. Stepwise multiple regression was used to estimate the relationship between heavy metals and cognitive and language scores; mediation analysis was performed to determine whether thyroid disruption was mechanistically involved...
November 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154121/trace-elements-in-the-liver-of-captive-and-free-ranging-european-bison-bison-bonasus-l
#3
Maciej Durkalec, Agnieszka Nawrocka, Michał Krzysiak, Magdalena Larska, Mirosława Kmiecik, Andrzej Posyniak
European bison is classified as a vulnerable species because of many threats. We analyzed the content of toxic and essential elements (Ag, Al, As, Ba, Be, Cd, Co, Cr, Cu, Hg, Mg, Mn, Na, Ni, Pb, Se, Th, Tl, U, V, and Zn) in the livers of 30 captive and free-ranging European bison from the Bison Breeding Center in Smardzewice and from Białowieża Primeval Forest in Poland. The contents of toxic elements were lower than reported previously in European Bison and were similar to those of wild ungulates from non-polluted areas...
November 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/29156334/applicability-evaluation-of-advanced-processes-for-elimination-of-neurophysiological-activity-of-antidepressant-fluoxetine
#4
László Szabó, Viktória Mile, Dóra J Kiss, Krisztina Kovács, Tamás Földes, Tamás Németh, Tünde Tóth, Renáta Homlok, György T Balogh, Erzsébet Takács, László Wojnárovits
Presence of the antidepressant fluoxetine in different water bodies has raised significant concerns due to its detrimental effects on non-targeted organisms, especially on fish. When seeking for an appropriate technology able to remove fluoxetine residue from a complex water matrix, special attention needs to be paid to the elimination of the neurophysiological activity that eventually lies behind the noxious effects of the parent compound. Our aim was to probe the applicability of advanced oxidation techniques for this purpose using in situ generated free radical system based on OH-initiated peroxyl radical-mediated processes...
November 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/29156332/effective-flocculation-of-microcystis-aeruginosa-with-simultaneous-nutrient-precipitation-from-hydrolyzed-human-urine
#5
Yan-Shan Wang, Zhong-Hua Tong, Long-Fei Wang, Guo-Ping Sheng, Han-Qing Yu
Mechanical harvest of massive harmful algal blooms is an effective measure for bloom mitigation. Yet subsequent processing of the resulting water from algae water separation after the harvesting becomes a new problem since individual algal cells or small algal aggregates are still present in the water. Here, we proposed a novel approach for effectively flocculating the cyanobacteria Microcystis aeruginosa with a removal efficiency of 97% in 6 h using hydrolyzed urine. Nitrogen and phosphorus were simultaneously reclaimed through struvite formation...
November 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/29161669/the-coastal-environment-affects-lead-and-sodium-uptake-by-the-moss-hypnum-cupressiforme-used-as-an-air-pollution-biomonitor
#6
Marie Renaudin, Sébastien Leblond, Caroline Meyer, Christophe Rose, Emeline Lequy
Several studies suggest that potential competition exists between marine cations and heavy metals for binding sites on the cell wall of mosses. This competition would impact the heavy metal concentration measured in mosses by biomonitoring programs, which may underestimate air pollution by heavy metals in a coastal environment. In the present study, we aim to identify possible mechanisms affecting lead uptake by mosses in a coastal environment, specifically, the competition between lead (Pb(2+)) and sodium (Na(+)) for binding sites in Hypnum cupressiforme (Hc)...
November 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154116/lanthanum-toxicity-to-five-different-species-of-soil-invertebrates-in-relation-to-availability-in-soil
#7
Jinxia Li, Rudo A Verweij, Cornelis A M van Gestel
This study determined the toxicity of lanthanum, one of the most commonly used rare earth elements (REEs), to five representative soil invertebrates after 3-4 weeks exposure. Toxicity was related to total, 0.01 M CaCl2-extractable and porewater concentrations in the standard LUFA 2.2 soil, and for earthworms also to body concentrations. La sorption to LUFA 2.2 soil, estimated by relating total soil concentrations to CaCl2-extractable or porewater concentrations seemed to reach saturation at >1000 mg La/kg dry soil...
November 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29149710/prevalence-and-sources-of-polychlorinated-biphenyls-in-the-atmospheric-environment-of-lake-victoria-east-africa
#8
Kenneth Arinaitwe, Derek C G Muir, Bernard T Kiremire, Phil Fellin, Henrik Li, Camilla Teixeira, Drake N Mubiru
The large surface area of Lake Victoria (about 68,800 km(2)) makes it vulnerable to high atmospheric deposition of chemical pollutants. We present measurements of polychlorinated biphenyls (PCBs) from the lake's atmospheric environment. High volume air (24 h) samples were collected within the northern Lake Victoria watershed in Uganda over two periods; 1999-2004 [at Kakira (KAK) and Entebbe (EBB)] and 2008-2010 (at EBB only). Precipitation samples were also collected monthly during the 2008-2010 period at EBB...
November 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145093/proteomic-profile-and-toxicity-pathway-analysis-in-zebrafish-embryos-exposed-to-bisphenol-a-and-di-n-butyl-phthalate-at-environmentally-relevant-levels
#9
Xing Dong, Xuchun Qiu, Shunlong Meng, Hai Xu, Xiangyang Wu, Ming Yang
Bisphenol A (BPA) and di-n-butyl phthalate (DBP) are well-known endocrine-disrupting chemicals (EDCs) that have human health risks. Chronic exposure to BPA and DBP increases the occurrence of human disease. Despite the potential for exposure in embryonic development, the mechanism of action of BPA and DBP on vertebrate development and disease still remains unclear. In the present study, we identified proteins and protein networks that are perturbed by BPA and DBP during zebrafish (Danio rerio) development. Zebrafish embryos were exposed to environmentally relevant levels of BPA (10 μg/L) and DBP (50 μg/L) for 96 h...
November 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/29156331/may-humic-acids-or-mineral-fertilisation-mitigate-arsenic-mobility-and-availability-to-carrot-plants-daucus-carota-l-in-a-volcanic-soil-polluted-by-as-from-irrigation-water
#10
Antonio G Caporale, Paola Adamo, Shah M G G Azam, Maria A Rao, Massimo Pigna
Carrot (Daucus carota L.) is a widely consumed root vegetable, whose growth and safety might be threatened by growing-medium arsenic (As) contamination. By this work, we evaluated the effects of humic acids from Leonardite and NPK mineral fertilisation on As mobility and availability to carrot plants grown for 60 days in a volcanic soil irrigated with As-contaminated water - representing the most common scenario occurring in As-affected Italian areas. As expected, the irrigation with As-contaminated water caused a serious toxic effect on plant growth and photosynthetic rate; the highest rate of As also inhibited soil enzymatic activity...
November 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154115/ecological-risk-assessment-of-microcystin-lr-in-the-upstream-section-of-the-haihe-river-based-on-a-species-sensitivity-distribution-model
#11
Zhiguang Niu, Lei Du, Jiafu Li, Ying Zhang, Zhiwei Lv
The eutrophication of surface water has been the main problem of water quality management in recent decades, and the ecological risk of microcystin-LR (MC-LR), which is the by-product of eutrophication, has drawn more attention worldwide. The aims of our study were to determine the predicted no effect concentration (PNEC) of MC-LR and to assess the ecological risk of MC-LR in the upstream section of the Haihe River. HC5 (hazardous concentration for 5% of biological species) and PNEC were obtained from a species sensitivity distribution (SSD) model, which was constructed with the acute toxicity data of MC-LR on aquatic organisms...
November 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/29149708/photodegradation-of-novel-oral-anticoagulants-under-sunlight-irradiation-in-aqueous-matrices
#12
Montaha Yassine, Laura Fuster, Marie-Hélène Dévier, Emmanuel Geneste, Patrick Pardon, Axelle Grélard, Erick Dufourc, Mohamad Al Iskandarani, Selim Aït-Aïssa, Jeanne Garric, Hélène Budzinski, Patrick Mazellier, Aurélien S Trivella
Kinetics of photodegradation of novel oral anticoagulants dabigatran, rivaroxaban, and apixaban were studied under simulated solar light irradiation in purified, mineral, and river waters. Dabigatran and rivaroxaban underwent direct photolysis with polychromatic quantum yields of 2.2 × 10(-4) and 4.4 × 10(-2), respectively. The direct photodegradation of apixaban was not observed after 19 h of irradiation. Kinetics of degradation of rivaroxaban was not impacted by the nature of the aqueous matrix while photosensitization from nitrate ions was observed for dabigatran and apixaban dissolved in a mineral water...
November 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154114/prevalence-and-predictors-of-phthalate-exposure-in-pregnant-women-in-charleston-sc
#13
Abby G Wenzel, John W Brock, Lori Cruze, Roger B Newman, Elizabeth R Unal, Bethany J Wolf, Stephen E Somerville, John R Kucklick
Phthalates are plasticizers commonly detected in human urine due to widespread exposure from PVC plastics, food packaging, and personal care products. Several phthalates are known antiandrogenic endocrine disruptors, which raises concern for prenatal exposure during critical windows of fetal development. While phthalate exposure is ubiquitous, certain demographics are subject to greater or lesser exposure. We sampled urine from 378 pregnant women during the second trimester of gestation living in Charleston, SC, and measured eight urinary phthalate metabolites as biomarkers of phthalate exposure: monobutyl phthalate (MBP), monobenzyl phthalate (MBzP), mono(2-ethylhexyl) phthalate (MEHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), monoethyl phthalate (MEP), monoisobutyl phthalate (MiBP), and monomethyl phthalate (MMP)...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29149713/adult-exposure-to-bisphenol-a-in-rare-minnow-gobiocypris-rarus-reduces-sperm-quality-with-disruption-of-testicular-aquaporins
#14
Yingying Zhang, Yongjing Guan, Ting Zhang, Cong Yuan, Yan Liu, Zaizhao Wang
Bisphenol A (BPA) is an endocrine disrupter which has adverse effects on male reproduction. Aquaporins (AQPs), well known water-selective channels, play important roles in spermatogenesis and sperm functions. However, whether AQPs participate in the process that BPA induces abnormal sperms has not been investigated to date. In the present study, adult male rare minnows Gobiocypris rarus were exposed to environmentally relevant concentrations BPA (15 and 225 μg/L) for 1, 2 and 3 weeks. Results showed that BPA exposure disrupted sperm motility, increased the percentage of abnormal sperm cells, and decreased sperm tolerance to hypotonic solution and sperm fertilization capacity...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145090/comparative-study-of-dissolved-organic-matter-generated-from-activated-sludge-during-exposure-to-hypochlorite-hydrogen-peroxide-acid-and-alkaline-implications-for-on-line-chemical-cleaning-of-mbr
#15
Weiwei Cai, Yu Liu
Although on-line chemical cleaning has been extensively employed for maintaining the MBR permeability, little attention has been given to the negative impacts of such prevalent membrane cleaning practice. This study thus comparatively investigated the potential release of dissolved organic matter (DOM) from activated sludge upon the exposure to different kinds of frequently-used cleaning reagents, i.e. NaClO, H2O2, HCl and NaOH. It was found that NaClO at 50 and 80 mg L(-1) triggered significant release of DOM, while NaOH strongly promoted soluble nitrogen release...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145088/phosphorus-recovery-and-leaching-of-trace-elements-from-incinerated-sewage-sludge-ash-issa
#16
Le Fang, Jiang-Shan Li, Ming Zhi Guo, C R Cheeseman, Daniel C W Tsang, Shane Donatello, Chi Sun Poon
Chemical extraction of phosphorus (P) from incinerated sewage sludge ash (ISSA) is adversely influenced by co-dissolution of metals and metalloids. This study investigated P recovery and leaching of Zn, Cu, Pb, As and Ni from ISSA using inorganic acids (sulphuric acid and nitric acid), organic acids (oxalic acid and citric acid), and chelating agents (ethylenediaminetetraacetic acid (EDTA) and ethylene diamine tetramethylene phosphonate (EDTMP)). The aim of this study was to optimize a leaching process to recover P-leachate with high purity for P fertilizer production...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29136572/multiple-bioanalytical-method-to-reveal-developmental-biological-responses-in-zebrafish-embryos-exposed-to-triclocarban
#17
Xing Dong, Hai Xu, Xiangyang Wu, Liuqing Yang
Triclocarban (TCC) is a well-known antibacterial agent that is frequently detected in environmental, wildlife and human samples. The potential toxicological effects and action mechanism of TCC on vertebrate development has remained unclear. In the present study, we analyzed phenotypic alterations, thyroid hormone levels, thyroid hormone responsive genes, and proteomic profiles of zebrafish embryos after exposure to a series of concentrations of TCC from 6 h post-fertilization (hpf) to 120 hpf. The most nonlethal concentration (MNLC), lethal concentration 10% (LC10) and lethal concentration 50% (LC50) of TCC for exposures of 96 h were 133...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29136569/unleaded-gasoline-as-a-significant-source-of-pb-emissions-in-the-subarctic
#18
Vladislav Chrastný, Hana Šillerová, Martina Vítková, Anna Francová, Jan Jehlička, Jana Kocourková, Paul E Aspholm, Lars O Nilsson, Tore F Berglen, Henning K B Jensen, Michael Komárek
After the phasing out of leaded gasoline, Pb emissions to the atmosphere dramatically decreased, and other sources became more significant. The contribution of unleaded gasoline has not been sufficiently recognized; therefore, we evaluated the impact of Pb from unleaded gasoline in a relatively pristine area in Subarctic NE Norway. The influence of different endmembers (Ni slag and concentrate from the Nikel smelter in Russia, PM10 filters, and traffic) on the overall Pb emissions was determined using various environmental samples (snow, lichens, and topsoils) and Pb isotope tracing...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29136568/derivation-of-aquatic-predicted-no-effect-concentration-pnec-for-ibuprofen-and-sulfamethoxazole-based-on-various-toxicity-endpoints-and-the-associated-risks
#19
Qiusen Huang, Qingwei Bu, Wenjue Zhong, Kaichong Shi, Zhiguo Cao, Gang Yu
For pharmaceuticals, the ecological risk assessment based on traditional endpoints of toxicity could not be properly protective in the long run since the mode of action could vary because they are intended for different therapeutic uses. In this study, the predicted no-effect concentrations (PNECs) of two selected pharmaceuticals, ibuprofen (IBU) and sulfamethoxazole (SMX), were derived based on either traditional endpoints of survival and growth data or some nonlethal endpoints such as reproduction, biochemical and molecular data...
November 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/29154119/a-conceptual-study-on-the-formulation-of-a-permeable-reactive-pavement-with-activated-carbon-additives-for-controlling-the-fate-of-non-point-source-environmental-organic-contaminants
#20
Shengyi Huang, Chenju Liang
To take advantage of the road pavement network where non-point source (NPS) pollution such as benzene, toluene, ethyl-benzene, and xylene (BTEX) from vehicle traffic exhaust via wet and dry atmospheric deposition occurs, the asphalt pavement may be used as a media to control the NPS pollution. An experiment to prepare an adsorptive porous reactive pavement (PRP) was initiated to explore the potential to reduce environmental NPS vehicle pollution. The PRP was prepared and studied as follows: various activated carbons (AC) were initially screened to determine if they were suitable as an additive in the porous asphalt mixture; various mixtures of a selected AC were incorporated with the design of porous asphalt concrete (PAC) to produce PRP, and the PRP formulations were tested to ensure that they comply with the required specifications; qualified specimens were subsequently tested to determine their adsorption capacity for BTEX in aqueous solution, as compared to conventional PAC...
November 7, 2017: Chemosphere
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