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Environmental Pollution

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https://www.readbyqxmd.com/read/28732339/aryl-and-alkyl-phosphorus-containing-flame-retardants-induced-mitochondrial-impairment-and-cell-death-in-chinese-hamster-ovary-cho-k1-cells
#1
Chao Huang, Na Li, Shengwu Yuan, Xiaoya Ji, Mei Ma, Kaifeng Rao, Zijian Wang
Phosphorus-containing flame retardants (PFRs) are increasingly in demand worldwide as replacements for brominated flame retardants (BFRs), but insufficient available toxicological information on PFRs makes assessing their health risks challenging. Mitochondria are important targets of various environmental pollutants, and mitochondrial dysfunction may lead to many common diseases. In the present study, mitochondria impairment-related endpoints were measured by a high content screening (HCS) assay for 11 selected non-halogen PFRs in Chinese hamster ovary (CHO-k1) cells...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732338/toxic-organic-substances-and-marker-compounds-in-size-segregated-urban-particulate-matter-implications-for-involvement-in-the-in%C3%A2-vitro-bioactivity-of-the-extractable-organic-matter
#2
Athanasios Besis, Alexandra Tsolakidou, Dimitra Balla, Constantini Samara, Dimitra Voutsa, Anastasia Pantazaki, Theodora Choli-Papadopoulou, Theodore S Lialiaris
Toxic organic substances and polar organic marker compounds, i.e. polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs) and their nitro-derivatives (N-PAHs), as well as dicarboxylic acids (DCAs) and sugars/sugar anhydrites (S/SAs) were analyzed in size-segregated PM samples (<0.49, 0.49-0.97, 0.97-3 and >3 μm) collected at two urban sites (urban traffic and urban background) during the cold and the warm season...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732337/critical-review-of-soil-contamination-by-polybrominated-diphenyl-ethers-pbdes-and-novel-brominated-flame-retardants-nbfrs-concentrations-sources-and-congener-profiles
#3
REVIEW
Thomas J McGrath, Andrew S Ball, Bradley O Clarke
Polybrominated diphenyl ethers (PBDEs) have been used in a broad array of polymeric materials such as plastics, foams, resins and adhesives to inhibit the spread of fires since the 1970s. The widespread environmental contamination and well documented toxic effects of PBDEs have led to bans and voluntary withdrawals in many jurisdictions. Replacement novel brominated flame retardants (NBFRs) have, however, exhibited many of the same toxic characteristics as PBDEs and appear to share similar environmental fate...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732336/using-machine-learning-to-identify-air-pollution-exposure-profiles-associated-with-early-cognitive-skills-among-u-s-children
#4
Jeanette A Stingone, Om P Pandey, Luz Claudio, Gaurav Pandey
Data-driven machine learning methods present an opportunity to simultaneously assess the impact of multiple air pollutants on health outcomes. The goal of this study was to apply a two-stage, data-driven approach to identify associations between air pollutant exposure profiles and children's cognitive skills. Data from 6900 children enrolled in the Early Childhood Longitudinal Study, Birth Cohort, a national study of children born in 2001 and followed through kindergarten, were linked to estimated concentrations of 104 ambient air toxics in the 2002 National Air Toxics Assessment using ZIP code of residence at age 9 months...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732335/characteristics-and-source-apportionment-of-pm2-5-during-persistent-extreme-haze-events-in-chengdu-southwest-china
#5
Lulu Li, Qinwen Tan, Yuanhang Zhang, Miao Feng, Yu Qu, Junling An, Xingang Liu
Based on detailed data from Chengdu Plain (CP) from 6 January to 16 January, two typical haze episodes were analyzed to clarify the haze formation mechanism in winter. Weather conditions, chemical compositions, secondary pollutant transformation, optical properties of aerosols, the potential source contribution function (PSCF) and source apportionment were studied. The planetary boundary layer (PBL) height decreased distinctly during the haze episodes and restrained air pollutant vertical dispersion. As the haze worsened, the value of PBL × PM2...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28728131/the-distribution-of-organochlorine-pesticides-in-sediments-from-isimangaliso-wetland-park-ecological-risks-and-implications-for-conservation-in-a-biodiversity-hotspot
#6
Archibold Buah-Kwofie, Marc S Humphries
The iSimangaliso Wetland Park World Heritage site, located on the east coast of South Africa, spans ∼3300 km(2) and constitutes the largest protected estuarine environment for hippopotami, crocodiles and aquatic birds in Africa. Given the ecological importance of this site and continued use of organochlorine pesticides (OCPs) in the region, this study focused on the nature, distribution and potential sources of organochlorine contamination within iSimangaliso Wetland Park. OCPs were widely distributed in surface sediment samples obtained from the four main Ramsar wetland systems within the park (Lake St Lucia, Mkhuze, Lake Sibaya and Kosi Bay)...
July 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28728088/phthalate-and-non-phthalate-plasticizers-in-indoor-dust-from-childcare-facilities-salons-and-homes-across-the-usa
#7
Bikram Subedi, Kenneth D Sullivan, Birendra Dhungana
The quality of indoor environment has received considerable attention owing to the declining outdoor human activities and the associated public health issues. The prolonged exposure of children in childcare facilities or the occupational exposure of adults to indoor environmental triggers can be a culprit of the pathophysiology of several commonly observed idiopathic syndromes. In this study, concentrations of potentially toxic plasticizers (phthalates as well as non-phthalates) were investigated in 28 dust samples collected from three different indoor environments across the USA...
July 17, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28719883/sublethal-insecticide-exposure-affects-reproduction-chemical-phenotype-as-well-as-offspring-development-and-antennae-symmetry-of-a-leaf-beetle
#8
Thorben Müller, Alexander Prosche, Caroline Müller
The area of agriculturally used land and following to that the use of pesticides are steadily increasing. Insecticides do not only reduce pest organisms on crops but can also affect non-target organisms when present in sublethal concentrations in the environment. We investigated the effects of an exposure to sublethal pyrethroid (lambda-cyhalothrin) concentrations, at doses 20 and 60 times lower than the LC50, respectively, on reproductive traits and adult cuticular hydrocarbon (CHC) profiles of a leaf beetle (Phaedon cochleariae Fabricius)...
July 15, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715774/model-elucidating-the-sources-and-formation-mechanisms-of-severe-haze-pollution-over-northeast-mega-city-cluster-in-china
#9
Ting Yang, Alex Gbaguidi, Pingzhong Yan, Wending Zhang, Lili Zhu, Xuefeng Yao, Zifa Wang, Hui Chen
Recent studies on regional haze pollution over China come up in general with strong variability of main causes of heavy polluted episodes, in linkage with local specificities, sources and pollution characteristics. This paper therefore aims at elucidating the main specific sources and formation mechanisms of observed strong haze pollution episodes over 1-15 November 2015 in Northeast region considered as one of biggest megacity clusters in China. The Northeast China mega-city cluster, including Heilong Jiang, Jilin and Liaoning provinces, is adjacent to Russia in the north, Mongolian at the west, North Korea at east, and representing key geographical location in the regional and transnational air pollution issues in China due to the presence of heavy industries and intense economic activities...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715773/developmental-toxicity-of-fe3o4-nanoparticles-on-cysts-and-three-larval-stages-of-artemia-salina
#10
Song Zhu, Ming-Yang Xue, Fei Luo, Wei-Chao Chen, Bin Zhu, Gao-Xue Wang
Using Artemia salina cysts (capsulated and decapsulated) and larvae (instar I, II and III) as experimental models, the potential effects of Fe3O4 nanoparticles (Fe3O4-NPs) on marine ecosystems were investigated. Hatchability, mortality and a number of ethological, morphological and biochemical parameters were selected as end-points to define the toxic responses. Data showed that the hatching rates of capsulated and decapsulated cysts were significantly decreased (p < 0.01) following exposure to 600 mg/L for 24 and 36 h...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715772/stability-of-single-dispersed-silver-nanoparticles-in-natural-and-synthetic-freshwaters-effects-of-dissolved-oxygen
#11
Xiaoyan Zou, Penghui Li, Jie Lou, Xiaoyan Fu, Hongwu Zhang
Silver nanoparticles (AgNPs) are increasingly used in various commercial products. This increased use raises ecological concerns because of the large release of AgNPs into the environment. Once released, the local water chemistry has the potential to influence the environmental fates and behaviors of AgNPs. The impacts of dissolved oxygen and natural organic matter (NOM) on the dissolution and stability of AgNPs were investigated in synthetic and natural freshwaters for 7 days. In synthetic freshwater, the aggregation of AgNPs occurred due to the compression of the electric double layer, accompanied by the dissolution of AgNPs...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715771/a-flow-through-aqueous-standard-generation-system-for-thin-film-microextraction-investigations-of-uv-filters-and-biocides-partitioning-to-different-environmental-compartments
#12
Fardin Ahmadi, Chris Sparham, Janusz Pawliszyn
In this paper problems associated with preparation of aqueous standard of highly hydrophobic compounds such as partial precipitation, being lost on the surfaces, low solubility in water and limited sample volume for accurate determination of their distribution coefficients are addressed. The following work presents two approaches that utilize blade thin film microextraction (TFME) to investigate partitioning of UV filters and biocides to humic acid (dissolved organic carbon) and sediment. A steady-state concentration of target analytes in water was generated using a flow-through aqueous standard generation (ASG) system...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715770/influence-of-flue-gas-desulfurization-fgd-installations-on-emission-characteristics-of-pm2-5-from-coal-fired-power-plants-equipped-with-selective-catalytic-reduction-scr
#13
Zhen Li, Jingkun Jiang, Zizhen Ma, Oscar A Fajardo, Jianguo Deng, Lei Duan
Flue gas desulfurization (FGD) and selective catalytic reduction (SCR) technologies have been widely used to control the emissions of sulphur dioxide (SO2) and nitrogen oxides (NOX) from coal-fired power plants (CFPPs). Field measurements of emission characteristics of four conventional CFPPs indicated a significant increase in particulate ionic species, increasing PM2.5 emission with FGD and SCR installations. The mean concentrations of PM2.5 from all CFPPs tested were 3.79 ± 1.37 mg/m(3) and 5.02 ± 1...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715769/high-throughput-profiling-and-analysis-of-antibiotic-resistance-genes-in-east-tiaoxi-river-china
#14
Ji Zheng, Ruixia Gao, Yuanyuan Wei, Tao Chen, Jiqing Fan, Zhenchao Zhou, Tiimub Benjamin Makimilua, Yanan Jiao, Hong Chen
The rapid human activities and urbanization exacerbate the human health risks induced by antibiotic resistance genes (ARGs). In this study, the profiling of ARGs was investigated using high-throughput qPCR from water samples of 13 catchment areas in East Tiaoxi River, China. High prevalence of ARGs indicated significant antibiotic resistance pollution in the research area (absolute abundance: 6.1 × 10(8)-2.1 × 10(10) copies/L; relative abundance: 0.033-0.158 copies/cell). Conventional water qualities (COD, TN, TP, NH3-N), bacterial communities and mobile gene elements (MGEs) were detected and analyzed as factors of ARGs shift...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28712873/the-effect-of-oil-sands-tailings-pond-sediments-on-embryo-larval-walleye-sander-vitreus
#15
J C Raine, D Turcotte, V Tumber, K M Peru, Z Wang, C Yang, J V Headley, J L Parrott
Walleye (Sander vitreus) are a commercially important North American fish species that inhabit the Athabasca River. This river flows through the Athabasca oil sands where natural sources of bitumen erode from the McMurray formation. Little information is available on responses of walleye embryos to oil sands tailings pond sediments in a laboratory setting. The current study describes the design and implementation of a daily-renewal bioassay to assess the potential effects of tailings pond sediments from the Athabasca oil sands area on walleye development...
July 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28711824/atmospheric-bulk-deposition-of-polycyclic-aromatic-hydrocarbons-in-shanghai-temporal-and-spatial-variation-and-global-comparison
#16
Daolun Feng, Ying Liu, Yi Gao, Jinxing Zhou, Lirong Zheng, Gang Qiao, Liming Ma, Zhifen Lin, Peter Grathwohl
Atmospheric deposition leads to accumulation of atmospheric polycyclic aromatic hydrocarbons (PAHs) on urban surfaces and topsoils. To capture the inherent variability of atmospheric deposition of PAHs in Shanghai's urban agglomeration, 85 atmospheric bulk deposition samples and 7 surface soil samples were collected from seven sampling locations during 2012-2014. Total fluxes of 17 PAHs were 587-32,300 ng m(-2) day(-1), with a geometric mean of 2600 ng m(-2) day(-1). The deposition fluxes were categorized as moderate to high on a global scale...
July 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28711823/using-nitrogen-concentration-and-isotopic-composition-in-lichens-to-spatially-assess-the-relative-contribution-of-atmospheric-nitrogen-sources-in-complex-landscapes
#17
P Pinho, C Barros, S Augusto, M J Pereira, C Máguas, C Branquinho
Reactive nitrogen (Nr) is an important driver of global change, causing alterations in ecosystem biodiversity and functionality. Environmental assessments require monitoring the emission and deposition of both the amount and types of Nr. This is especially important in heterogeneous landscapes, as different land-cover types emit particular forms of Nr to the atmosphere, which can impact ecosystems distinctively. Such assessments require high spatial resolution maps that also integrate temporal variations, and can only be feasibly achieved by using ecological indicators...
July 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28711569/the-influence-of-land-use-on-source-apportionment-and-risk-assessment-of-polycyclic-aromatic-hydrocarbons-in-road-deposited-sediment
#18
Jin Zhang, Junwei Wu, Pei Hua, Zhonghua Zhao, Lei Wu, Gongduan Fan, Yun Bai, Thomas Kaeseberg, Peter Krebs
The pollution load of urban runoff is boosted due to the washing away of road-deposited sediment (RDS). Therefore, a source-oriented mitigation strategy is essential to integrated stormwater management. This study showcases the influence of land use dependent source apportionment and risk assessment of polycyclic aromatic hydrocarbons (PAHs) in RDS. Samples were collected from areas of different land uses, including commercial city centre, highway, residential rural and campus areas. According to the positive matrix factorisation (PMF) receptor model, different primary sources were identified at different land use areas...
July 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28711568/is-prehypertension-more-strongly-associated-with-long-term-ambient-air-pollution-exposure-than-hypertension-findings-from-the-33-communities-chinese-health-study
#19
Bo-Yi Yang, Zhengmin Min Qian, Michael G Vaughn, Erik J Nelson, Shyamali C Dharmage, Joachim Heinrich, Shao Lin, Wayne R Lawrence, Huimin Ma, Duo-Hong Chen, Li-Wen Hu, Xiao-Wen Zeng, Shu-Li Xu, Chuan Zhang, Guang-Hui Dong
Numerous studies have evaluated the effects of long-term exposure to ambient air pollution on hypertension. However, little information exists regarding its effects on prehypertension, a very common, but understudied cardiovascular indicator. We evaluated data from 24,845 adults (ages 18-74 years) living in three Northeastern Chinese cities in 2009. Blood pressure (BP) was measured by trained observers using a standardized mercuric-column sphygmomanometer. Three-year (from 2006 to 2008) average concentrations of particles with an aerodynamic diameter ≤10 μm (PM10), sulfur dioxide (SO2), nitrogen dioxides (NO2), and ozone (O3) were calculated using data from monitoring stations...
July 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28711567/the-trans-continental-distributions-of-pentachlorophenol-and-pentachloroanisole-in-pine-needles-indicate-separate-origins
#20
Henrik Kylin, Teresia Svensson, Sören Jensen, William M J Strachan, Robert Franich, Hindrik Bouwman
The production and use of pentachlorophenol (PCP) was recently prohibited/restricted by the Stockholm Convention on persistent organic pollutants (POPs), but environmental data are few and of varying quality. We here present the first extensive dataset of the continent-wide (Eurasia and Canada) occurrence of PCP and its methylation product pentachloroanisole (PCA) in the environment, specifically in pine needles. The highest concentrations of PCP were found close to expected point sources, while PCA chiefly shows a northern and/or coastal distribution not correlating with PCP distribution...
July 13, 2017: Environmental Pollution
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