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Persistent organic pollutants

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https://www.readbyqxmd.com/read/28212462/climate-change-contaminant-interactions-in-marine-food-webs-towards-a-conceptual-framework
#1
Juan José Alava, William W L Cheung, Peter S Ross, Rashid U Sumaila
Climate change is reshaping the way in which contaminants move through the global environment, in large part by changing the chemistry of the oceans and affecting the physiology, health and feeding ecology of marine biota. Climate change-associated impacts on structure and function of marine food webs, with consequent changes in contaminant transport, fate and effects, is likely to have significant repercussions to those human populations that rely on fisheries resources for food, recreation or culture. Published studies on climate change-contaminant interactions with a focus on food web bioaccumulation were systematically reviewed to explore how climate change and ocean acidification may impact contaminant levels in marine food webs...
February 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28210952/two-dechlorinated-chlordecone-derivatives-formed-by-in-situ-chemical-reduction-are-devoid-of-genotoxicity-and-mutagenicity-and-have-lower-proangiogenic-properties-compared-to-the-parent-compound
#2
Samuel Legeay, Pierre-André Billat, Nicolas Clere, Fabrice Nesslany, Sébastien Bristeau, Sébastien Faure, Christophe Mouvet
Chlordecone (CLD) is a chlorinated hydrocarbon insecticide, now classified as a persistent organic pollutant. Several studies have previously reported that chronic exposure to CLD leads to hepatotoxicity, neurotoxicity, raises early child development and pregnancy complications, and increases the risk of liver and prostate cancer. In situ chemical reduction (ISCR) has been identified as a possible way for the remediation of soils contaminated by CLD. In the present study, the objectives were (i) to evaluate the genotoxicity and the mutagenicity of two CLD metabolites formed by ISCR, CLD-5a-hydro, or CLD-5-hydro (5a- or 5- according to CAS nomenclature; CLD-1Cl) and tri-hydroCLD (CLD-3Cl), and (ii) to explore the angiogenic properties of these molecules...
February 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28202225/persistent-organic-pollutants-and-diabetes-among-inuit-in-the-canadian-arctic
#3
Kavita Singh, Hing Man Chan
Type 2 diabetes is a chronic metabolic disease that is of increasing concern in Inuit communities. Behavioural factors such as physical inactivity and poor diet are well-known risk factors. Exposure to persistent organic pollutants (POPs) has emerged as an additional factor in the pathogenesis of diabetes. In this study, association between polychlorinated biphenyls (PCBs) and p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE) with diabetes in Canadian Inuit was examined. Data from the Adult Inuit Health Survey (2007-2008) of Inuit participants from the Canadian Arctic were analyzed...
February 12, 2017: Environment International
https://www.readbyqxmd.com/read/28202064/prediagnostic-plasma-concentrations-of-organochlorines-and-risk-of-b-cell-non-hodgkin-lymphoma-in-envirogenomarkers-a-nested-case-control-study
#4
Rachel S Kelly, Hannu Kiviranta, Ingvar A Bergdahl, Domenico Palli, Ann-Sofie Johansson, Maria Botsivali, Paolo Vineis, Roel Vermeulen, Soterios A Kyrtopoulos, Marc Chadeau-Hyam
BACKGROUND: Evidence suggests a largely environmental component to non-Hodgkin's lymphoma (NHL). Persistent organic pollutants (POPs) including polychlorinated biphenyls (PCBs), DDE and HCB have been repeatedly implicated, but the literature is inconsistent and a causal relationship remains to be determined. METHODS: The EnviroGenoMarkers study is nested within two prospective cohorts EPIC-Italy and the Northern Sweden Health and Disease Study. Six PCB congeners, DDE and HCB were measured in blood plasma samples provided at recruitment using gas-chromatography mass spectrometry...
February 16, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28199944/removal-of-pharmaceuticals-from-water-by-homo-heterogonous-fenton-type-processes-a-review
#5
REVIEW
Amir Mirzaei, Zhi Chen, Fariborz Haghighat, Laleh Yerushalmi
The presence of emerging contaminants such as pharmaceuticals in natural waters has raised increasing concern due to their frequent appearance and persistence in the aquatic ecosystem and the threat to health and safety of aquatic life, even at trace concentrations. Conventional water treatment processes are known to be generally inadequate for the elimination of these persistent contaminants. Therefore, the use of advanced oxidation processes (AOPs) which are able to efficiently oxidize organic pollutants has attracted a great amount of attention...
February 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28189073/lower-levels-of-persistent-organic-pollutants-metals-and-the-marine-omega-3-fatty-acid-dha-in-farmed-compared-to-wild-atlantic-salmon-salmo-salar
#6
Anne-Katrine Lundebye, Erik-Jan Lock, Josef D Rasinger, Ole Jakob Nøstbakken, Rita Hannisdal, Egil Karlsbakk, Vidar Wennevik, Abdullah S Madhun, Lise Madsen, Ingvild Eide Graff, Robin Ørnsrud
Contaminants and fatty acid levels in farmed- versus wild Atlantic salmon have been a hot topic of debate in terms of food safety. The present study determined dioxins (polychlorinated dibenzo-p-dioxin and dibenzofuran), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), organochlorine pesticides (OCPs), metals and fatty acids in wild and farmed Atlantic salmon. Contaminant levels of dioxins, PCBs, OCPs (DDT, dieldrin, lindane, chlordane, Mirex, and toxaphene), and mercury were higher in wild salmon than in farmed salmon, as were the concentrations of the essential elements selenium, copper, zinc and iron, and the marine omega-3 fatty acid docosahexaenoic acid (DHA)...
February 8, 2017: Environmental Research
https://www.readbyqxmd.com/read/28187347/influence-of-blooms-of-phytoplankton-on-concentrations-of-hydrophobic-organic-chemicals-in-sediments-and-snails-in-a-hyper-eutrophic-freshwater-lake
#7
Wei Shi, Nanyang Yu, Xia Jiang, Zhihua Han, Shuhang Wang, Xiaowei Zhang, Si Wei, John P Giesy, Hongxia Yu
Blooms of phytoplankton, which are common in freshwater ecosystems, might not only affect quality of water but also influence biogeochemical processing of pollutants. Based on three years of field observations in sediments of Tai Lake, China, concentrations of organochlorine (OC) pesticides and polycyclic aromatic hydrocarbons (PAHs) in areas where blooms occurred were 2.4 and 3.4 times greater than concentrations in areas without blooms. Concentrations of octylphenol (OP), nonylphenol (NP) and bisphenol A (BPA) in areas where blooms did not occur were 3...
January 31, 2017: Water Research
https://www.readbyqxmd.com/read/28186216/absolute-configuration-determination-through-the-unique-intramolecular-excitonic-coupling-in-the-circular-dichroisms-of-o-p-ddt-and-o-p-ddd-a-combined-experimental-and-theoretical-study
#8
Hiroki Tanaka, Yoshihisa Inoue, Takeshi Nakano, Tadashi Mori
Circular dichroisms (CDs) of the o,p'-isomers of 1,1,1-trichloro- and 1,1-dichloro-2,2-bis(chlorophenyl)ethanes (DDT and DDD) were investigated experimentally and theoretically. A series of strong Cotton effect peaks in a characteristic negative-negative-positive-negative, or its mirror-imaged, pattern were observed in the CD spectra of these persistent organic pollutants. The theoretical CD spectra at the SAC-CI/B95(d) and RI-CC2/def2-TZVPP levels well reproduced the experimental ones, enabling us to unambiguously assign the absolute configuration of (+)-DDT and (-)-DDD as S...
February 10, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28160993/three-cycles-of-human-biomonitoring-in-flanders-time-trends-observed-in-the-flemish-environment-and-health-study
#9
Greet Schoeters, Eva Govarts, Liesbeth Bruckers, Elly Den Hond, Vera Nelen, Stefaan De Henauw, Isabelle Sioen, Tim S Nawrot, Michelle Plusquin, Annette Vriens, Adrian Covaci, Ilse Loots, Bert Morrens, Dries Coertjens, Nicolas Van Larebeke, Sam De Craemer, Kim Croes, Nathalie Lambrechts, Ann Colles, Willy Baeyens
To follow time trends in exposure to environmental chemicals, three successive campaigns of the Flemish Environment and Health Study (FLEHS) have recruited and sampled in total 5825 participants between 2002 and 2014. Cord samples from newborns, urine and blood samples from 14 to 15 years old adolescents and from adults between 50 and 65 years old were analysed in geographical representative samples of the Flemish population. The data of the different campaigns were considered per age group and per biomarker after adjustment for predefined covariates to take into account differences in characteristics of the study populations over time...
November 18, 2016: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28160980/ingestion-of-marine-debris-by-the-white-chinned-petrel-procellaria-aequinoctialis-is-it-increasing-over-time-off-southern-brazil
#10
Maria V Petry, Victória R F Benemann
Seabirds are amongst the most affected organisms by plastic pollution worldwide. Ingestion of marine debris has been reported in at least 122 species, and owing to the increasing global production and persistence of these anthropogenic materials within the marine environment, it is expected to be a growing problem to the marine fauna. Here we report evidence of an increasing frequency in marine debris ingestion and a decrease in the amount of plastic pellets ingested by White-chinned Petrels attending south Brazilian waters during the last three decades...
February 1, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28159396/rapid-formation-of-a-severe-regional-winter-haze-episode-over-a-mega-city-cluster-on-the-north-china-plain
#11
Jie Li, Huiyun Du, Zifa Wang, Yele Sun, Wenyi Yang, Jianjun Li, Xiao Tang, Pingqing Fu
The Nested Air Quality Prediction Model System (NAQPMS) was used to investigate an extreme regional haze episode persisting over the Beijing-Tianjin-Hebei megacity cluster from November 26 to December 1, 2015. During this extreme haze event, the regional daily mean PM2.5 exceeded 500 μg/m3. We found that local emissions were the main source of haze over Beijing and Hebei in the early formational stage of this episode. The accumulation of regionally transported, highly aged secondary inorganic aerosols (SIA) along the foot of the mountains was responsible (60%) for the rapid increase of surface PM2...
January 31, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28157607/temporal-occurrence-and-sources-of-persistent-organic-pollutants-in-suspended-particulate-matter-from-the-most-heavily-polluted-river-mouth-of-lake-chaohu-china
#12
Cheng Liu, Lei Zhang, Chengxin Fan, Fuliu Xu, Kaining Chen, Xiaozhi Gu
The Nanfei River is by many measures the most heavily polluted tributary to Lake Chaohu. In this study, the temporal occurrence and sources of four classes of persistent organic pollutants (POPs), including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs), in suspended particulate matter (SPM) from the river mouth were investigated monthly during 2014. Results show that concentrations of all four POPs in SPM were higher than those in the sediment of Lake Chaohu...
January 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28157603/efficient-treatment-of-perfluorohexanoic-acid-by-nanofiltration-followed-by-electrochemical-degradation-of-the-nf-concentrate
#13
Álvaro Soriano, Daniel Gorri, Ane Urtiaga
The present study was aimed at the development of a strategy for removing and degrading perfluorohexanoic acid (PFHxA) from industrial process waters at concentrations in the range 60-200 mg L(-1). The treatment train consisted of nanofiltration (NF) separation followed by electrochemical degradation of the NF concentrate. Using a laboratory-scale system and working in the total recirculation mode, the DowFilm NF270 membrane provided PFHxA rejections that varied in the range 96.6-99.4% as the operating pressure was increased from 2...
January 25, 2017: Water Research
https://www.readbyqxmd.com/read/28146072/a-mixture-of-persistent-organic-pollutants-and-perfluorooctanesulfonic-acid-induces-similar-behavioural-responses-but-different-gene-expression-profiles-in-zebrafish-larvae
#14
Abdolrahman Khezri, Thomas W K Fraser, Rasoul Nourizadeh-Lillabadi, Jorke H Kamstra, Vidar Berg, Karin E Zimmer, Erik Ropstad
Persistent organic pollutants (POPs) are widespread in the environment and some may be neurotoxic. As we are exposed to complex mixtures of POPs, we aimed to investigate how a POP mixture based on Scandinavian human blood data affects behaviour and neurodevelopment during early life in zebrafish. Embryos/larvae were exposed to a series of sub-lethal doses and behaviour was examined at 96 h post fertilization (hpf). In order to determine the sensitivity window to the POP mixture, exposure models of 6 to 48 and 48 to 96 hpf were used...
January 29, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28142013/association-between-serum-concentrations-of-persistent-organic-pollutants-and-smoking-in-koreans-a-cross-sectional-study
#15
Ho Jung Moon, Jung-Eun Lim, Sun Ha Jee
BACKGROUND: Studies on the associations between persistent organic pollutants (POPs) and smoking according to gender and smoking amount (cigarettes/day) are limited, and the results regarding the relationship between POPs and smoking are not completely consistent across studies. OBJECTIVES: The smoking rate in Korea is one of the highest among the Organization for Economic Cooperation and Development (OECD) countries. We investigated the association between serum concentrations of POPs and cigarette smoking in Koreans by smoking status (never-smoker/ever-smoker) and smoking amount (cigarettes/day) according to gender...
February 2017: Journal of Epidemiology
https://www.readbyqxmd.com/read/28135614/the-emerging-source-of-polycyclic-aromatic-hydrocarbons-from-mining-in-the-tibetan-plateau-distributions-and-contributions-in-background-soils
#16
Jun Li, Guo-Li Yuan, Ping Li, Yong Sun, Hong-Hui Yu, Gen-Hou Wang
The Tibetan Plateau (TP) serves as the background for persistent organic pollutants around the world. In addition to outside sources, local sources greatly contribute to the environment of the TP in recent decades. Mining activity could serve as an emerging source of polycyclic aromatic hydrocarbons (PAHs), although this issue has been neglected in the TP until now. To investigate the distributions and contributions of PAHs transported from mining activity, forty-one surface soil samples along six sampling directions were collected at a regular distance from the Jiama mining area (JMA) of the TP at altitudes between 3726 and 4863m...
January 27, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28128926/mechanism-of-intrinsic-chemiluminescence-production-from-the-degradation-of-persistent-chlorinated-phenols-by-fenton-system-a-structure-activity-relationship-study-and-the-critical-role-of-quinoid-and-semiquinone-radical-intermediates
#17
Hui-Ying Gao, Li Mao, Feng Li, Lin-Na Xie, Chun-Hua Huang, Jie Shao, Bo Shao, Balaraman Kalyanaraman, Ben-Zhan Zhu
We found recently that intrinsic chemiluminescence (CL) could be produced by all 19 chlorophenolic persistent organic pollutants during environmentally-friendly advanced oxidation processes. However, the underlying mechanism for the structure-activity relationship (SAR, i.e., the chemical structures and the CL generation) remains unclear. In this study, we found that, for all 19 chlorophenol congeners tested, the CL increased with increasing number of chlorine atoms in general; and for chlorophenol isomers (such as the 6 trichlorophenols), the CL decreased in the order of meta- > ortho-/para-Cl-substituents with respect to the -OH group of chlorophenols...
January 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28121269/mycoremediation-of-hydrocarbons-with-basidiomycetes-a-review
#18
Roland Treu, Jerzy Falandysz
The literature on hydrocarbon remediation with basidiomycetes was reviewed. Two ecological groups are considered for bioremediation, the saprotrophic basidiomycetes (white-rot and brown-rot fungi) and the ectomycorrhizal basidiomycetes. A remarkable capacity of basidiomycetes for in vitro degradation of simple and recalcitrant hydrocarbons, such as PAH, persistent organic pollutants (POPs), halogenated HC, aromatic HC and phenols, explosives and dyes was reported for many species. However, there is a need for more studies on the practical feasibility of field applications with basidiomycetes...
March 4, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28119248/concentrations-of-vitamin-a-e-thyroid-and-testosterone-hormones-in-blood-plasma-and-tissues-from-emaciated-adult-male-arctic-foxes-vulpes-lagopus-dietary-exposed-to-persistent-organic-pollutants-pops
#19
Tonje W Rogstad, Christian Sonne, Gro D Villanger, Øystein Ahlstøm, Eva Fuglei, Derek C G Muir, Even Jørgensen, Bjørn Munro Jenssen
The aim of the present study was to investigate the relationships and effects of oral POP exposure on retinol (vitamin A), α-tocopherol (vitamin E), thyroid hormones and testosterone in emaciated adult farmed Arctic foxes. Eight brother-pairs were exposed to either a diet containing naturally POP-contaminated minke whale blubber (Balaenoptera acutorostrata) (n=8), or a control diet containing pig (Sus scrofa) fat as the primary fat source (n=8) for 22 months. In the whale blubber containing feed the ∑POPs concentration was 802ng/g w...
January 21, 2017: Environmental Research
https://www.readbyqxmd.com/read/28117374/adverse-effects-of-microplastics-and-oxidative-stress-induced-mapk-nrf2-pathway-mediated-defense-mechanisms-in-the-marine-copepod-paracyclopina-nana
#20
Chang-Bum Jeong, Hye-Min Kang, Min-Chul Lee, Duck-Hyun Kim, Jeonghoon Han, Dae-Sik Hwang, Sami Souissi, Su-Jae Lee, Kyung-Hoon Shin, Heum Gi Park, Jae-Seong Lee
Microplastic pollution causes a major concern in the marine environment due to their worldwide distribution, persistence, and adverse effects of these pollutants in the marine ecosystem. Despite its global presence, there is still a lack of information on the effect of microplastics on marine organisms at the molecular level. Herein we demonstrated ingestion and egestion of nano- (0.05 μm) and micro-sized (0.5 and 6 μm) polystyrene microbeads in the marine copepod Paracyclopina nana, and examined molecular responses to exposure to microbeads with in vivo endpoints such as growth rate and fecundity...
January 24, 2017: Scientific Reports
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