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Journal of Environmental Sciences (China)

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https://www.readbyqxmd.com/read/29289296/identification-of-differentially-expressed-genes-response-to-tcdd-in-rat-brain-after-long-term-low-dose-exposure
#1
Yangsheng Chen, Li Xu, Heidi Q H Xie, Tuan Xu, Hualing Fu, Songyan Zhang, Rui Sha, Yingjie Xia, Bin Zhao
Several cohort studies have reported that dioxin and dioxin-like polychlorinated biphenyls might impair the nervous system and lead to neurological or neurodegenerative diseases in the elder people, but there is limited research on the involved mechanism. By using microarray analysis, we figured out the differentially expressed genes between brain samples from SD rats after low-dose (0.1μg/(kg▪bw)) dioxin exposure for six months and controls. To investigate the function changes in the course of dioxin exposure, Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed on the differentially expressed genes...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289295/nontarget-screening-using-passive-air-and-water-sampling-with-a-level-ii-fugacity-model-to-identify-unregulated-environmental-contaminants
#2
In-Young Chung, Yu-Mi Park, Hyun-Jeoung Lee, Hyuk Kim, Dong-Hoon Kim, Il-Gyu Kim, Sang-Min Kim, Young-Sun Do, Kwang-Seol Seok, Jung-Hwan Kwon
It is thought that there are many unregulated anthropogenic chemicals in the environment. For risk assessment of chemicals, it is essential to estimate the predicted environmental concentrations. As an effort of identifying residual organic contaminants in air and water in Korea, nontarget screening using two-dimensional gas chromatography time-of-flight mass spectrometry (GC×GC-TOFMS) was conducted at 10 sites using polyurethane foam passive air sampler and at 6 sites using polydimethyl siloxane (PDMS) passive water sampler in three different seasons in 2014...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289294/intrinsic-chemiluminescence-production-from-the-degradation-of-haloaromatic-pollutants-during-environmentally-friendly-advanced-oxidation-processes-mechanism-structure-activity-relationship-and-potential-applications
#3
REVIEW
Benzhan Zhu, Chen Shen, Huiying Gao, Liya Zhu, Jie Shao, Li Mao
The ubiquitous distribution of halogenated aromatic compounds (XAr) coupled with their carcinogenicity has raised public concerns on their potential risks to both human health and the ecosystem. Recently, advanced oxidation processes (AOPs) have been considered as an "environmentally-friendly" technology for the remediation and destruction of such recalcitrant and highly toxic XAr. During our study on the mechanism of metal-independent production of hydroxyl radicals (OH) by halogenated quinones and H2O2, we found, unexpectedly, that an unprecedented OH-dependent two-step intrinsic chemiluminescene (CL) can be produced by H2O2 and tetrachloro-p-benzoquinone, the major carcinogenic metabolite of the widely used wood preservative pentachlorophenol...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289293/effects-of-cu2-and-humic-acids-on-degradation-and-fate-of-tbbpa-in-pure-culture-of-pseudomonas-sp-strain-cdt
#4
Yini Ma, Yingying Zhao, Yongfeng Wang, Xiangzhen Li, Feifei Sun, Phillippe Francois-Xavier Corvini, Rong Ji
Soil contamination with tetrabromobisphenol A (TBBPA) has caused great concerns; however, the presence of heavy metals and soil organic matter on the biodegradation of TBBPA is still unclear. We isolated Pseudomonas sp. strain CDT, a TBBPA-degrading bacterium, from activated sludge and incubated it with 14C-labeled TBBPA for 87 days in the absence and presence of Cu2+ and humic acids (HA). TBBPA was degraded to organic-solvent extractable (59.4%±2.2%) and non-extractable (25.1%±1.3%) metabolites, mineralized to CO2 (4...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289292/stable-oligonucleotide-functionalized-gold-nanosensors-for-environmental-biocontaminant-monitoring
#5
Maria V Riquelme, Weinan Leng, Marcos Carzolio, Amy Pruden, Peter Vikesland
The global propagation of environmental biocontaminants such as antibiotic resistant pathogens and their antibiotic resistance genes (ARGs) is a public health concern that highlights the need for improved monitoring strategies. Here, we demonstrate the environmental stability and applicability of an oligonucleotide-functionalized gold nanosensor. The mecA ARG was targeted as model biocontaminant due to its presence in clinically-relevant pathogens and to its emergence as an environmental contaminant. mecA-specific nanosensors were tested for antibiotic resistance gene (ARG) detection in ARG-spiked effluent from four wastewater treatment plants (WWTPs)...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289291/potential-for-natural-and-enhanced-attenuation-of-sulphanilamide-in-a-contaminated-chalk-aquifer
#6
Karen A Bennett, Simon D Kelly, Xiangyu Tang, Brian J Reid
Understanding antibiotic biodegradation is important to the appreciation of their fate and removal from the environment. In this research an Isotope Ratio Mass Spectrometry (IRMS) method was developed to evaluate the extent of biodegradation of the antibiotic, sulphanilamide, in contaminated groundwater. Results indicted an enrichment in δ13C of 8.44‰ from -26.56 (at the contaminant source) to -18.12‰ (300m downfield of the source). These results confirm reductions in sulphanilamide concentrations (from 650 to 10mg/L) across the contaminant plume to be attributable to biodegradation (56%) vs...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289290/toxicities-and-risk-assessment-of-heavy-metals-in-sediments-of-taihu-lake-china-based-on-sediment-quality-guidelines
#7
Yanfeng Zhang, Yuwei Han, Jinxi Yang, Lingyan Zhu, Wenjue Zhong
The occurrence, toxicities, and ecological risks of five heavy metals (Pb, Cu, Cd, Zn and Ni) in the sediment of Taihu Lake were investigated in this study. To evaluate the toxicities caused by the heavy metals, the toxicities induced by organic contaminants and ammonia in the sediments were screened out with activated carbon and zeolite. The toxicities of heavy metals in sediments were tested with benthic invertebrates (tubificid and chironomid). The correlations between toxicity of sediment and the sediment quality guidelines (SQGs) derived previously were evaluated...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289289/airborne-pcdd-fs-in-two-e-waste-recycling-regions-after-stricter-environmental-regulations
#8
Manwen Zhang, Guixian Feng, Wenhua Yin, Bing Xie, Mingzhong Ren, Zhencheng Xu, Sukun Zhang, Zongwei Cai
Since the 2010s, the authorities of Guangdong province and local governments have enhanced law enforcement and environmental regulations to abolish open burning, acid washing, and other uncontrolled e-waste recycling activities. In this study, ambient air and indoor dust near different kinds of e-waste recycling processes were collected in Guiyu and Qingyuan to investigate the pollution status of particles and polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) after stricter environmental regulations. PM2...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289288/development-and-validation-of-abiotic-ligand-model-for-nickel-toxicity-to-wheat-triticum-aestivum
#9
Yang Jiang, Xueyuan Gu, Bojing Zhu, Cheng Gu
A terrestrial biotic ligand model (t-BLM) was developed to predict nickel toxicity to wheat (Triticum aestivum) root elongation in hydroponic solutions. The competitive effects of five major cations (Ca2+, Mg2+, Na+, K+ and H+) on Ni toxicity were investigated and Mg2+was found to be a strong competitor, while H+ showed less competing effect. Besides free Ni2+, the toxicity induced by the species NiHCO3+ was non-neglect able at pH>7 because NiHCO3+ occupied a significant fraction of total Ni under such condition...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289287/development-of-matrix-solid-phase-dispersion-method-for-the-extraction-of-short-chain-chlorinated-paraffins-in-human-placenta
#10
Ying Wang, Wei Gao, Jing Wu, Huijin Liu, Yingjun Wang, Yawei Wang, Guibin Jiang
Chlorinated paraffins (SCCPs) are widely used worldwide, and they can be released into the environment during their production, transport, usage and disposal, which pose potential risks for human health. In this work, an efficient, reliable and rapid pretreatment method based on matrix solid-phase dispersion (MSPD) was developed for the analysis of short-chain CPs (SCCPs) in human placenta by gas chromatograph-electron capture negative ion low-resolution mass spectrometry (GC-ECNI-LRMS) and gas chromatography-quadrupole time-of-flight mass spectrometry (GC-QTOF-HRMS)...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289286/abnormal-energy-metabolism-and-tau-phosphorylation-in-the-brains-of-middle-aged-mice-in-response-to-atmospheric-pm2-5-exposure
#11
Rui Gao, Tingting Ku, Xiaotong Ji, Yingying Zhang, Guangke Li, Nan Sang
In light of the accelerated aging of the global population and the deterioration of the atmosphere pollution, we sought to clarify the potential mechanisms by which fine particulate matter (PM2.5) can cause cognitive impairment and neurodegeneration through the alteration of mitochondrial structure and function. The results indicate that PM2.5 inhalation reduces ATP production by disrupting the aerobic tricarboxylic acid cycle and oxidative phosphorylation, thereby causing the hypophosphorylation of tau in the cortices of middle-aged mice...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289285/from-chemical-mixtures-to-antibiotic-resistance
#12
REVIEW
Jun Ye, Christopher Rensing, Jianqiang Su, Yong-Guan Zhu
In real environment, it is unlikely that contaminants exist singly; environmental contamination with chemical mixtures is a norm. However, the impacts of chemical mixtures on environmental quality and ecosystem health have been overlooked in the past. Among the complex interactions between different contaminants, their relationship with the rise of antibiotic resistance (AR) is an emerging environmental concern. In this paper, we review recent progresses on how chemicals or chemical mixtures promote AR. We propose that, through co-selection, agents causing stress to bacteria may induce AR...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289284/exposure-to-endocrine-disrupting-chemicals-perturbs-lipid-metabolism-and-circadian-rhythms
#13
Renate Kopp, Irene Ozáez Martínez, Jessica Legradi, Juliette Legler
A growing body of evidence indicates that exposure to environmental chemicals can contribute to the etiology of obesity by inappropriately stimulating adipogenesis as well as perturbing lipid metabolism and energy balance. One potential mechanism by which chemical exposure can influence lipid metabolism is through disturbance of circadian rhythms, endogenously-driven cycles of roughly 24hr in length that coordinate biochemical, physiological, and behavioral processes in all organisms. Here we show for the first time that exposure to endocrine disrupting compounds (EDCs), including the pesticide tributyltin, two commercial flame retardants, and a UV-filter chemical found in sunscreens, can perturb both circadian clocks and lipid metabolism in vertebrates...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289283/the-presence-and-partitioning-behavior-of-flame-retardants-in-waste-leachate-and-air-particles-from-norwegian-waste-handling-facilities
#14
Nicolas A O Morin, Patrik L Andersson, Sarah E Hale, Hans Peter H Arp
Flame retardants in commercial products eventually make their way into the waste stream. Herein the presence of flame retardants in Norwegian landfills, incineration facilities and recycling sorting/defragmenting facilities is investigated. These facilities handled waste electrical and electronic equipment (WEEE), vehicles, digestate, glass, combustibles, bottom ash and fly ash. The flame retardants considered included polybrominated diphenyl ethers (∑BDE-10) as well as dechlorane plus, polybrominated biphenyls, hexabromobenzene, pentabromotoluene and pentabromoethylbenzene (collectively referred to as ∑FR-7)...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289282/oxidation-reactivity-of-1-2-bis-2-4-6-tribromophenoxy-ethane-btbpe-by-compound-i-model-of-cytochrome-p450s
#15
Zhongyu Wang, Zhiqiang Fu, Qi Yu, Jingwen Chen
Alternative brominated flame retardants (BFRs) have become prevalent as a consequence of restrictions on the use of polybrominated diphenyl ethers (PBDEs). For risk assessment of these alternatives, knowledge of their metabolism via cytochrome P450 enzymes is needed. We have previously proved that density functional theory (DFT) is able to predict the metabolism of PBDEs by revealing the molecular mechanisms. In the current study, the reactivity of 1,2-bis(2,4,6-tribromophenoxy)ethane and structurally similar chemicals with the Compound I model representing the active site of P450 enzymes was investigated...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289281/mesoporous-carbon-nanomaterials-induced-pulmonary-surfactant-inhibition-cytotoxicity-inflammation-and-lung-fibrosis
#16
Yunan Chen, Yi Yang, Bolong Xu, Shunhao Wang, Bin Li, Juan Ma, Jie Gao, Yi Y Zuo, Sijin Liu
Environmental exposure and health risk upon engineered nanomaterials are increasingly concerned. The family of mesoporous carbon nanomaterials (MCNs) is a rising star in nanotechnology for multidisciplinary research with versatile applications in electronics, energy and gas storage, and biomedicine. Meanwhile, there is mounting concern on their environmental health risks due to the growing production and usage of MCNs. The lung is the primary site for particle invasion under environmental exposure to nanomaterials...
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29289280/new-takes-on-emerging-contaminants-preface
#17
EDITORIAL
William A Mitch
No abstract text is available yet for this article.
December 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29191320/distribution-characteristics-of-poly-and-perfluoroalkyl-substances-in-the-yangtze-river-delta
#18
Binghui Zheng, Xiaolei Liu, Rui Guo, Qing Fu, Xingru Zhao, Shanjun Wang, Sheng Chang, Xing Wang, Mengjiao Geng, Guang Yang
In this work, a method was developed and optimized for the analysis of polyfluoroalkyl and/or perfluoroalkyl substances (PFASs) content in surface water and sediment samples with high instrumental response and good separation. Surface water and sediment samples were collected from the Yangtze River Delta (YRD) to analyze the distribution characteristics of perfluoroalkyl carboxylic acids (PFCAs), perfluoroalkane sulfonic acids (PFSAs), perfluoroalkyl phosphonic acids (PFPAs), perfluoroalkyl phosphinic acids (PFPiAs), and polyfluoroalkyl phosphoric acid diesters (diPAPs)...
November 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29191319/rate-of-hexabromocyclododecane-decomposition-and-production-of-brominated-polycyclic-aromatic-hydrocarbons-during-combustion-in-a-pilot-scale-incinerator
#19
Yuichi Miyake, Masahiro Tokumura, Qi Wang, Takashi Amagai, Yuichi Horii
Here, we examined the incineration of extruded polystyrene containing hexabromocyclododecane (HBCD) in a pilot-scale incinerator under various combustion temperatures (800-950°C) and flue gas residence times (2-8sec). Rates of HBCD decomposition ranged from 99.996% (800°C, 2sec) to 99.9999% (950°C, 8sec); the decomposition of HBCD, except during the initial stage of combustion (flue gas residence time<2sec), followed a pseudo-first-order kinetics model. An Arrhenius plot revealed that the activation energy and frequency factor of the decomposition of HBCD by combustion were 14...
November 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29191318/contribution-of-precursor-compounds-to-the-release-of-per-and-polyfluoroalkyl-substances-pfass-from-waste-water-treatment-plants-wwtps
#20
Ulrika Eriksson, Peter Haglund, Anna Kärrman
Per- and polyfluoroalkyl substances (PFASs) are ubiquitous in sludge and water from waste water treatment plants, as a result of their incorporation in everyday products and industrial processes. In this study, we measured several classes of persistent PFASs, precursors, transformation intermediates, and newly identified PFASs in influent and effluent sewage water and sludge from three municipal waste water treatment plants in Sweden, sampled in 2015. For sludge, samples from 2012 and 2014 were analyzed as well...
November 2017: Journal of Environmental Sciences (China)
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