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https://www.readbyqxmd.com/read/29149710/prevalence-and-sources-of-polychlorinated-biphenyls-in-the-atmospheric-environment-of-lake-victoria-east-africa
#1
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/29146212/the-current-environmental-levels-of-endocrine-disruptors-mercury-cadmium-organochlorine-pesticides-and-pcbs-in-a-belgian-adult-population-and-their-predictors-of-exposure
#2
Catherine Pirard, Stephanie Compere, Katty Firquet, Corinne Charlier
A human biomonitoring study was carried out measuring the levels of endocrine disruptors in 252 participants (18-76 years old) recruited between February and May 2015 from the general population of Liege Province (Belgium). In this study, we reported the recent levels of cadmium and mercury in urine, some organochlorine pesticides and polychlorinated biphenyls (PCBs) in serum, and their relations to demographic characteristics, lifestyle behaviors and dietary habits. The median urinary levels of mercury and cadmium were 0...
October 31, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29146075/persistent-organic-pollutant-emission-via-dust-deposition-throughout-pakistan-spatial-patterns-regional-cycling-and-their-implication-for-human-health-risks
#3
Muhammad Sohail, Syed Ali Musstjab Akber Shah Eqani, Joel Podgorski, Avit Kumar Bhowmik, Adeel Mahmood, Nadeem Ali, Tara Sabo-Attwood, Habib Bokhari, Heqing Shen
In the current study, Persistent Organic Pollutants (POPs) in outdoor dustfall was monitored for the first time along the Indus river system of Pakistan. Among the studied OCPs (ng/g, dry weight), DDTs (0.16-62) were the predominant contaminants identified in deposited dust followed by HCHs (0.1-10.2), HCB (0.09-7.4) and chlordanes (0.1-2.8). The indicative diagnostic ratio for DDTs and HCHs suggested recent emission of DDTs as well as historical emission of both chemicals in regions where they were used for crop protection and malarial control...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29145101/the-distribution-and-trends-of-persistent-organic-pollutants-and-mercury-in-marine-mammals-from-canada-s-eastern-arctic
#4
REVIEW
Tanya M Brown, Robie W Macdonald, Derek C G Muir, Robert J Letcher
Arctic contaminant research in the marine environment has focused on organohalogen compounds and mercury mainly because they are bioaccumulative, persistent and toxic. This review summarizes and discusses the patterns and trends of persistent organic pollutants (POPs) and mercury in ringed seals (Pusa hispida) and polar bears (Ursus maritimus) in the Eastern Canadian Arctic relative to the rest of the Canadian Arctic. The review provides explanations for these trends and looks at the implications of climate-related changes on contaminants in these marine mammals in a region that has been reviewed little...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29143255/pcb-exposure-and-potential-future-cancer-incidence-in-slovak-children-an-assessment-from-molecular-finger-printing-by-ingenuity-pathway-analysis-ipa%C3%A2-derived-from-experimental-and-epidemiological-investigations
#5
Somiranjan Ghosh, Christopher A Loffredo, Partha S Mitra, Tomas Trnovec, Lubica Palkovicova Murinova, Eva Sovcikova, Eric P Hoffman, Kepher H Makambi, Sisir K Dutta
The risk of cancer due to PCB exposure in humans is highly debated. In eastern Slovakia, high exposure of the population to organochlorines (especially PCBs) was associated with various disease and disorder pathways, viz., endocrine disruption, metabolic disorder & diabetes, and cancer, thereby disturbing several cellular processes, including protein synthesis, stress response, and apoptosis. We have evaluated a Slovak cohort (45-month children, at lower and higher levels of PCB exposure from the environment) for disease and disorder development to develop early disease cancer biomarkers that could shed new light on possible mechanisms for the genesis of cancers under such chemical exposures, and identify potential avenues for prevention...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29141235/bioremediation-of-pcb-contaminated-shallow-river-sediments-the-efficacy-of-biodegradation-using-individual-bacterial-strains-and-their-consortia
#6
Hana Horváthová, Katarína Lászlová, Katarína Dercová
Elimination of dangerous toxic and hydrophobic chlorinated aromatic compounds, mainly PCBs from the environment, is one of the most important aims of the environmental biotechnologies. In this work, biodegradation of an industrial mixture of PCBs (Delor 103, equivalent to Aroclor 1242) was performed using bacterial consortia composed of four bacterial strains isolated from the historically PCB-contaminated sediments and characterized as Achromobacter xylosoxidans, Stenotrophomonas maltophilia, Ochrobactrum anthropi and Rhodococcus ruber...
November 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/29136567/persistent-organic-pollutants-in-red-and-white-blooded-high-antarctic-notothenioid-fish-from-the-remote-weddell-sea
#7
Anneli Strobel, Peter Schmid, Patricia Burkhardt-Holm, Helmut Segner, Markus Zennegg
It has been suggested that High-Antarctic waters, despite their remoteness from human activities, are impacted by anthropogenic pollution, and that the local biota are accumulating the contaminants. At present, no data exist on persistent organic pollutant (POP) body burdens for notothenioid fish inhabiting the High-Antarctic Weddell Sea. We determined the pollutant load in white muscle tissue of red- and white-blooded notothenoids from the Weddell Sea (Trematomus loennbergii and Chionodraco hamatus, respectively), and compared them to our previous measurements of POPs in Low-Antarctic notothenioids...
November 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29136534/investigating-the-potential-impact-of-polycyclic-aromatic-hydrocarbons-pahs-and-polychlorinated-biphenyls-pcbs-on-gene-biomarker-expression-and-global-dna-methylation-in-loggerhead-sea-turtles-caretta-caretta-from-the-adriatic-sea
#8
Paolo Cocci, Gilberto Mosconi, Luca Bracchetti, John Mark Nalocca, Emanuela Frapiccini, Mauro Marini, Giovanni Caprioli, Gianni Sagratini, Francesco Alessandro Palermo
Polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) are priority contaminants that bioaccumulate through the food webs and affect the biology of a variety of resident and migratory species, including sea turtles. Few studies have evaluated toxicological biomarkers of exposure to PAHs and PCBs in these animals. The present paper reports the results of an initial field study to quantify the association between plasma concentrations of PAHs/PCBs and whole blood cell expression of gene biomarkers in juvenile loggerhead sea turtles (Caretta caretta) rescued along the Italian coasts of the northern and central areas of the Adriatic Sea...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29131945/enantioselectivity-of-2-2-3-5-6-pentachlorobiphenyl-pcb-95-atropisomers-toward-ryanodine-receptors-ryrs-and-their-influences-on-hippocampal-neuronal-networks
#9
Wei Feng, Jing Zheng, Gaelle Robin, Yao Dong, Makoto Ichikawa, Yoshihisa Inoue, Tadashi Mori, Takeshi Nakano, Isaac N Pessah
Nineteen ortho-substituted PCBs are chiral and found enantioselectively enriched in ecosystems. Their differential actions on biological targets are not understood. PCB 95 (2,2',3,5',6-pentachlorobiphenyl), a chiral PCB of current environmental relevance, is among the most potent towards modifying ryanodine receptors (RyR) function and Ca2+ signaling. PCB 95 atropisomers are separated and assigned aR- and aS-PCB 95 using 3 chiral-columns HPLC and circular dichroism spectroscopy. Studies of RyR1-enriched microsomes show aR-PCB 95 with >4X greater potency (EC50=0...
November 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29129429/serum-concentrations-of-organochlorine-compounds-and-predictors-of%C3%A2-exposure-in-children-living-in-agricultural-communities-from-south-eastern-spain
#10
B González-Alzaga, M Lacasaña, A F Hernández, J P Arrebola, I López-Flores, F Artacho-Cordón, J P Bonde, N Olea, C Aguilar-Garduño
BACKGROUND: Information on exposure levels to organochlorine compounds (OCs) in child population is limited, despite their greater vulnerability to the adverse health effects of these chemicals. OBJECTIVE: To determine serum concentrations of 10 OCs (including organochlorine pesticides and polychlorinated biphenyls -PCBs-) in children living in agricultural communities from Almería (South-Eastern Spain), and to identify the main predictors of exposure related to socio-economic characteristics, diet and lifestyle...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127935/determinants-of-prenatal-exposure-to-polybrominated-diphenyl-ethers-pbdes-among-urban-minority-infants-born-between-1998-and-2006
#11
Whitney J Cowell, Andreas Sjödin, Richard Jones, Ya Wang, Shuang Wang, Julie B Herbstman
Polybrominated diphenyl ethers (PBDEs) are environmentally persistent chemicals that structurally resemble legacy pollutants, such as polychlorinated biphenyls (PCBs). PBDEs were added to consumer products for over 30 years, before being phased out due to evidence of toxicity. We examined temporal changes in prenatal exposure to PBDEs, as well as other sources of variation. We measured PBDEs in umbilical cord plasma from 327 minority infants born in New York City between 1998 and 2006. We used linear regression to examine changes in concentrations over time and in relation to lifestyle characteristics collected during pregnancy...
November 8, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29127834/comparison-of-chlordecone-and-ndl-pcb-decontamination-dynamics-in-growing-male-kids-after-cessation-of-oral-exposure-is-there-a-potential-to-decrease-the-body-levels-of-these-pollutants-by-dietary-supplementation-of-activated-carbon-or-paraffin-oil
#12
Marie-Laure Lastel, Agnès Fournier, Stefan Jurjanz, Jean-Pierre Thomé, Célia Joaquim-Justo, Harry Archimède, Maurice Mahieu, Cyril Feidt, Guido Rychen
Sixteen weaned male Alpine kids (Capra hircus) were subjected to a 21-day oral daily exposure of 0.05 mg kg(-1) BW. d(-1) of chlordecone (CLD) and 0.30 μg kg(-1) BW. d(-1) of each non-dioxin-like polychlorinated biphenyls (NDL-PCBs, congeners 28, 52, 101, 138, 153 and 180). Four kids, identified as the CONTA group, were slaughtered at the end of the exposure, while the remaining animals (n = 12) were fed with specific diets for an additional 21-day decontamination period before slaughtering. Kids from the DECONTA (n = 4) group were fed a control diet, while those from the AC10% and PO8% group received pellets supplemented with 10% activated carbon (AC) and 8% paraffin oil (PO), respectively...
October 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29126639/sedimentary-black-carbon-and-organochlorines-in-lesser-himalayan-region-of-pakistan-relationship-along-the-altitude
#13
Usman Ali, Andrew James Sweetman, Rahat Riaz, Jun Li, Gan Zhang, Kevin C Jones, Riffat Naseem Malik
Black carbon (BC) and total organic carbon (TOC) along with their relationship with organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were assessed in Lesser Himalayan Region (LHR) in different altitudinal zones based on anthropogenic influence/source proximity under the scope of this study. Results revealed the concentrations of BC, TOC, OCPs and PCBs varied between 0.3 and 43.5mgg(-1), 1.7-65.4mgg(-1), 0.59-3.64ngg(-1) and 0.01-1.31ngg(-1), respectively. Spatial distribution trends have shown higher levels of OCPs and PCBs contamination near populated and urban areas along the altitude...
November 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29125581/occurrence-of-polychlorinated-dibenzo-p-dioxins-and-dibenzofurans-and-polychlorinated-biphenyls-in-fruit-and-vegetables-from-the-land-of-fires-area-of-southern-italy
#14
Mauro Esposito, Antonella De Roma, Stefania Cavallo, Gianfranco Diletti, Loredana Baldi, Giampiero Scortichini
The concentrations of polychlorinated dibenzo-p-concentrations dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) (PCDD/Fs), and polychlorinated biphenyls (PCBs) were determined in fruit and vegetables collected in farms located in the well-known "Land of Fires" area of Southern Italy, in an effort to learn more about the environmental pollution of this high-risk area due to illegal waste dumping and uncontrolled burning near cultivated fields. Concentrations were in the range 0.011-2.26 ng g(-1) for the six "indicator" non-dioxin-like PCBs (NDL-PCBs), and 0...
November 10, 2017: Toxics
https://www.readbyqxmd.com/read/29122355/current-status-of-organochlorine-pesticides-ocps-and-polychlorinated-biphenyls-pcbs-exposure-among-mothers-and-their-babies-of-korea-check-cohort-study
#15
Sooran Choi, Hai-Joong Kim, Sunmi Kim, Gyuyeon Choi, Sungjoo Kim, Jeongim Park, Soon-Sup Shim, Inae Lee, Sungkyoon Kim, Hyo-Bang Moon, Kyungho Choi, Jeong Jae Lee, Su Young Kim
Despite the global ban, organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) have been a persistent and significant environmental health issue worldwide. Prenatal exposure to these persistent organic pollutants (POPs) has been identified as a major route of exposure among developing fetuses and newborn infants. Among Children's Health and Environmental Health of Korea (CHECK) cohort population, pregnant females (n=148) and their matching newborn infants (n=117) recruited from four cities of Korea in 2011 were investigated...
November 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29120176/persistent-organic-pollutants-in-the-east-antarctic-atmosphere-inter-annual-observations-from-2010-2015-using-high-flow-through-passive-sampling
#16
Susan Bengtson Nash, Sean Wild, Darryl W Hawker, Roger Cropp, Hayley Hung, Frank Wania, Hang Xiao, Pernilla Bohlin Nizzetto, Anders Bignert, Sara Broomhall
In the first multi-year sampling effort for POPs in the eastern Antarctic atmosphere, 32 PCBs and 38 organochlorine pesticides were targeted in air collected with a high-flow-through passive sampler. Agricultural chemicals were found to dominate atmospheric profiles, in particular HCB and endosulfan-I, with average concentrations of 12,600 and 550 fg/m3, respectively. HCB showed higher concentrations in the austral summer, indicative of local, temperature-dependent volatilisation, whilst endosulfan-I appeared to show fresh, late-austral-summer input followed by temporally decreasing levels throughout the year...
November 9, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29108004/direct-and-indirect-effects-of-different-types-of-microplastics-on-freshwater-prey-corbicula-fluminea-and-their-predator-acipenser-transmontanus
#17
Chelsea M Rochman, J Mark Parnis, Mark A Browne, Sebastian Serrato, Eric J Reiner, Matthew Robson, Thomas Young, Miriam L Diamond, Swee J Teh
We examined whether environmentally relevant concentrations of different types of microplastics, with or without PCBs, directly affect freshwater prey and indirectly affect their predators. Asian clams (Corbicula fluminea) were exposed to environmentally relevant concentrations of polyethylene terephthalate (PET), polyethylene, polyvinylchloride (PVC) or polystyrene with and without polychlorinated biphenyls (PCBs) for 28 days. Their predators, white sturgeon (Acipenser transmontanus), were exposed to clams from each treatment for 28 days...
2017: PloS One
https://www.readbyqxmd.com/read/29107777/legacy-and-emerging-organohalogenated-contaminants-in-wild-edible-aquatic-organisms-implications-for-bioaccumulation-and-human-exposure
#18
Runxia Sun, Xiaojun Luo, Qing X Li, Tao Wang, Xiaobo Zheng, Pingan Peng, Bixian Mai
Highly industrialized and urbanized watersheds may receive various contaminants from anthropogenic activities. In this study, legacy and emerging organohalogenated contaminants (OHCs) were measured in edible wild aquatic organisms sampled from the Pearl River and Dongjiang River in a representative industrial and urban region in China. High concentrations of target contaminants were observed. The Pearl River exhibited higher concentrations of OHCs than the Dongjiang River due to high industrialization and urbanization...
November 3, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29107350/dynamics-of-persistent-organic-pollutants-in-obese-adolescents-during-weight-loss
#19
Govindan Malarvannan, Kim Van Hoorenbeeck, Ann Deguchtenaere, Stijn L Verhulst, Eveline Dirinck, Luc Van Gaal, Philippe G Jorens, Adrian Covaci
We have investigated the dynamics of various persistent organic pollutants (POPs) in the serum of 94 obese adolescents (34 boys and 60 girls: age range 11-19years) before (0M) and after 5months (5M) of undergoing weight loss treatment. Six groups of POPs, such as polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs), chlordane compounds (CHLs), hexachlorocyclohexane isomers (HCHs), hexachlorobenzene (HCB) and polybrominated diphenyl ethers (PBDEs), were detected in all samples in the decreasing order of median levels: DDTs>PCBs>HCB>HCHs>CHLs>PBDEs...
January 2018: Environment International
https://www.readbyqxmd.com/read/29107230/assessing-pcb-pollution-in-the-baltic-sea-an-equilibrium-partitioning-based-study
#20
Susann-Cathrin Lang, Philipp Mayer, Andrew Hursthouse, Danijela Kötke, Ines Hand, Detlef Schulz-Bull, Gesine Witt
Sediment cores and bottom water samples from across the Baltic Sea region were analyzed for freely dissolved concentrations (Cfree), total sediment concentrations (CT) and the dissolved aqueous fraction in water of seven indicator PCBs. Ex-situ equilibrium sampling of sediment samples was conducted with polydimethylsiloxane (PDMS) coated glass fibers that were analyzed by automated thermal desorption GC-MS, which yielded PCB concentrations in the fiber coating (CPDMS). Measurements of CPDMS and CT were then applied to determine (i) spatially resolved freely dissolved PCB concentrations; (ii) baseline toxicity potential based on chemical activities (a); (iii) site specific mixture compositions; (iv) diffusion gradients at the sediment water interface and within the sediment cores; and (vi) site specific distribution ratios (KD)...
October 13, 2017: Chemosphere
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