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Persistent organic pollutants

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https://www.readbyqxmd.com/read/29136596/occurrence-of-organic-uv-filters-and-metabolites-in-lebranche-mullet-mugil-liza-from-brazil
#1
Daniel Molins-Delgado, Ramón Muñoz, Sylvia Nogueira, Mariana B Alonso, João Paulo Torres, Olaf Malm, Roberta Lourenço Ziolli, Rachel Ann Hauser-Davis, Ethel Eljarrat, Damià Barceló, M Silvia Díaz-Cruz
UV filters (UV-Fs) constitute a heterogeneous group of chemicals used as protection against the effects of UV radiation, widely used in all sort of goods and ubiquitous in the environment. The presence of these chemicals in fish is a matter of concern, because many UV-Fs display hormonal activity. In this study, muscle, gills, and liver from 11 Mugil liza individuals from the highly urbanized Guanabara Bay (Rio de Janeiro, Brazil) were analysed in order to detect eight UV-Fs and metabolites (4-dihydroxybenzophenone [BP1] (2-hydroxy-4-methoxybenzophenone [BP3], 4-methylbenzylidiene camphor [4MBC], ethylhexyl methoxycinnamate [EHMC], ethylhexyl dimethyl p-aminobenzoic acid [ODPABA], octocrylene [OC], 4-hydroxybenzophenone [4HB], and 4,4'-dihydroxybenzophenone [4DHB]) using liquid chromatography-tandem mass spectrometry (HPLC-MS/MS)...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29136593/polycyclic-aromatic-hydrocarbons-and-organochlorine-pesticides-in-surface-water-from-the-yongding-river-basin-china-seasonal-distribution-source-apportionment-and-potential-risk-assessment
#2
Yizhen Wang, Shilu Zhang, Wenyan Cui, Xianzhi Meng, Xianqiang Tang
The presence of 17 polycyclic aromatic hydrocarbons (PAHs) and 15 persistent organochlorine pesticides (OCPs) in surface water of the Yongding River Basin was analyzed through GC/MS/MS during the spring and summer at 46 sampling sites. The goal was to investigate their seasonal distribution, possible sources, and potential risk. Our results showed that the total PAH concentration in surface water of Yongding River Basin ranged from 41.60 to 1482.60ng/L with a mean value of 137.85ng/L in the spring, and from 53...
November 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29136567/persistent-organic-pollutants-in-red-and-white-blooded-high-antarctic-notothenioid-fish-from-the-remote-weddell-sea
#3
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
#4
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/29134287/particulate-matter-levels-in-a-south-american-megacity-the-metropolitan-area-of-lima-callao-peru
#5
Jose Silva, Jhojan Rojas, Magdalena Norabuena, Carolina Molina, Richard A Toro, Manuel A Leiva-Guzmán
The temporal and spatial trends in the variability of PM10 and PM2.5 from 2010 to 2015 in the metropolitan area of Lima-Callao, Peru, are studied and interpreted in this work. The mean annual concentrations of PM10 and PM2.5 have ranges (averages) of 133-45 μg m(-3) (84 μg m(-3)) and 35-16 μg m(-3) (26 μg m(-3)) for the monitoring sites under study. In general, the highest annual concentrations are observed in the eastern part of the city, which is a result of the pattern of persistent local winds entering from the coast in a south-southwest direction...
November 13, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29128804/hexachlorobenzene-as-a-persistent-organic-pollutant-toxicity-and-molecular-mechanism-of-action
#6
REVIEW
Beata Starek-Świechowicz, Bogusława Budziszewska, Andrzej Starek
Hexachlorobenzene (HCB) is an organochlorine pesticide widely distributed in the environment. Chronic exposure of humans to HCB leads to a number of effects, such as triggering of porphyria, microsomal enzyme induction, thyroid dysfunctions, neurological symptoms, and immunological disorders. In animals, HCB induced hepatic porphyria, neurotoxic effects, and toxic effects on the thyroid function, reproductive system, and immune system. HCB as a dioxin-like compound and a weak ligand of the aryl hydrocarbon receptor (AhR) is a hormonal disruptor...
July 1, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29127872/biomonitoring-levels-and-trends-of-pahs-and-synthetic-musks-associated-with-land-use-in-urban-environments
#7
Ivan Tavera Busso, Florencia Tames, José Avelino Silva, Sara Ramos, Vera Homem, Nuno Ratola, Hebe Carreras
Polycyclic aromatic hydrocarbons (PAHs) are some of the most studied organic compounds in urban environments, due to their known adverse effects on human health and persistence in environmental matrices. During the last decade, new groups of organic compounds with an intensive use worldwide such as synthetic musks have been raising the interest of the scientific community given their toxicity and health effects. However, literature is still scarce in studies dealing with their concentration in the environment, especially in developing countries, where they are even more rare or non-existing at all...
November 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29127836/combined-use-of-microbial-consortia-isolated-from-different-agricultural-soils-and-cyclodextrin-as-a-bioremediation-technique-for-herbicide-contaminated-soils
#8
J Villaverde, M Rubio-Bellido, A Lara-Moreno, F Merchan, E Morillo
The phenylurea herbicide diuron is persistent in soil, water and groundwater and is considered to be a highly toxic molecule. The principal product of its biodegradation, 3,4-dichloroaniline, exhibits greater toxicity than diuron and is persistent in the environment. Five diuron degrading microbial consortia (C1C5), isolated from different agricultural soils, were investigated for diuron mineralization activity. The C2 consortium was able to mineralize 81.6% of the diuron in solution, while consortium C3 was only able to mineralize 22...
November 1, 2017: Chemosphere
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
#9
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/29122313/has-the-question-of-e-waste-opened-a-pandora-s-box-an-overview-of-unpredictable-issues-and-challenges
#10
REVIEW
Bouchra Bakhiyi, Sabrina Gravel, Diana Ceballos, Michael A Flynn, Joseph Zayed
Despite regulatory efforts and position papers, electrical and electronic waste (e-waste) remains ill-managed as evidenced by the extremely low rates of proper e-waste recycling (e-recycling) worldwide, ongoing illegal shipments to developing countries and constantly reported human health issues and environmental pollution. The objectives of this review are, first, to expose the complexity of e-waste problems, and then to suggest possible upstream and downstream solutions. Exploring e-waste issues is akin to opening a Pandora's box...
January 2018: Environment International
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
#11
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/29117588/metabolic-profiling-on-the-effect-of-2-2-4-4-tetrabromodiphenyl-ether-bde-47-in-mcf-7%C3%A2-cells
#12
Juntong Wei, Li Xiang, Zigao Yuan, Shangfu Li, Chunxue Yang, Hongxia Liu, Yuyang Jiang, Zongwei Cai
Polybrominated diphenyl ethers (PBDEs) are commonly used to prevent the development of fire in various factory products. Due to the adverse effects on human health and the bio-accumulation capacity, PBDEs are considered as one kind of persistent organic pollutants (POPs). BDE-47 is one of the most frequently detected PBDEs congeners in human samples. Although numerous studies have shown the close connection between BDE-47 and human health, few reports were related to breast carcinoma. In the present study, the toxicity mechanism of BDE-47 was investigated by using MCF-7 breast cancer cells...
October 31, 2017: Chemosphere
https://www.readbyqxmd.com/read/29116079/a-mesoporous-cationic-thorium-organic-framework-that-rapidly-traps-anionic-persistent-organic-pollutants
#13
Yuxiang Li, Zaixing Yang, Yanlong Wang, Zhuanling Bai, Tao Zheng, Xing Dai, Shengtang Liu, Daxiang Gui, Wei Liu, Meng Chen, Lanhua Chen, Juan Diwu, Lingyan Zhu, Ruhong Zhou, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
Many environmental pollutants inherently exist in their anionic forms and are therefore highly mobile in natural water systems. Cationic framework materials that can capture those pollutants are highly desirable but scarcely reported. Here we present a mesoporous cationic thorium-based MOF (SCU-8) containing channels with a large inner diameter of 2.2 nm and possessing a high surface area of 1360 m(2) g(-1). The anion-exchange properties of SCU-8 were explored with many anions including small oxo anions like ReO4(-) and Cr2O7(2-) as well as anionic organic dyes like methyl blue and the persistent organic pollutant, perfluorooctane sulfonate (PFOS)...
November 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/29107350/dynamics-of-persistent-organic-pollutants-in-obese-adolescents-during-weight-loss
#14
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/29106481/blood-concentrations-of-persistent-organic-pollutants-and-unhealthy-metabolic-phenotypes-in-normal-weight-overweight-and-obese-individuals
#15
Magda Gasull, Conxa Castell, Natàlia Pallarès, Carme Miret, José Pumarega, María Te Llez-Plaza, Tomàs López, Jordi Salas-Salvadó, Duk-Hee Lee, Albert Goday, Miquel Porta
Factors underlying metabolic phenotypes, such as the metabolically healthy but obese phenotype, remain unclear. Differences in metabolic phenotypes -particularly, among individuals with a similar body mass index- could be related to concentrations of persistent organic pollutants (POPs). No studies have analyzed POPs and metabolic phenotypes in normal-weight persons. The authors investigated the relationships between serum concentrations of POPs and metabolic phenotypes in 860 normal-weight, overweight, and obese participants in the 2002 Catalan Health Interview Survey (Spain)...
June 30, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/29100689/effects-of-decabromodiphenyl-ether-and-planting-on-the-abundance-and-community-composition-of-nitrogen-fixing-bacteria-and-ammonia-oxidizers-in-mangrove-sediments-a-laboratory-microcosm-study
#16
Juan Chen, Pei-Fang Wang, Chao Wang, Xun Wang, Han Gao
While nitrogen (N) fixation and ammonia oxidation by microorganisms are two important N cycling processes, little is known about how the microbes that drive these two processes respond when sediments are contaminated with persistent organic pollutants. In this study, we carried out a laboratory microcosm experiment to examine the effects of decabromodiphenyl ether (BDE-209), either on its own or combined with a common mangrove species, Avicennia marina, on the abundance, diversity, and community composition of N-fixing bacteria (NFB) and ammonia-oxidizing archaea (AOA) and bacteria (AOB) in mangrove sediments...
October 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29098478/persistent-organic-pollutants-as-risk-factors-for-obesity-and-diabetes
#17
REVIEW
Chunxue Yang, Alice Pik Shan Kong, Zongwei Cai, Arthur C K Chung
PURPOSE OF REVIEW: The rising prevalence of obesity and diabetes cannot be fully explained by known risk factors, such as unhealthy diet, a sedentary lifestyle, and family history. This review summarizes the available studies linking persistent organic pollutants (POPs) to obesity and diabetes and discusses plausible underlying mechanisms. RECENT FINDINGS: Increasing evidence suggest that POPs may act as obesogens and diabetogens to promote the development of obesity and diabetes and induce metabolic dysfunction...
November 2, 2017: Current Diabetes Reports
https://www.readbyqxmd.com/read/29096325/oxidative-stress-elicited-autophagosome-accumulation-contributes-to-human-neuroblastoma-sh-sy5y-cell-death-induced-by-pbde-47
#18
Cheng Zhang, Pei Li, Shun Zhang, Rongrong Lei, Bei Li, Xue Wu, Chunyang Jiang, Xiaofei Zhang, Rulin Ma, Lu Yang, Chao Wang, Xiao Zhang, Tao Xia, Aiguo Wang
Polybrominated diphenyl ethers, a ubiquitous persistent organic pollutant used as brominated flame retardants, is known to damage nervous system, however the underlying mechanism is still elusive. In this study, we used human neuroblastoma SH-SY5Y cells to explore the effects of PBDE-47 on autophagy and investigate the role of autophagy in PBDE-47-induced cell death. Results showed PBDE-47 could increase autophagic level (performation of cell ultrastructure with double membrane formation, MDC-positive cells raised, autophagy-related proteins LC3-II, Beclin1 and P62 increased) after cells exposed to PBDE-47...
October 19, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29096317/maternal-and-paternal-serum-concentrations-of-persistent-organic-pollutants-and-the-secondary-sex-ratio-a-population-based-preconception-cohort-study
#19
Jisuk Bae, Sungduk Kim, Dana Boyd Barr, Germaine M Buck Louis
Recent declines in the secondary sex ratio (SSR), defined as the ratio of males to females at birth, in some industrialized countries may be attributed to exposure to environmental toxicants such as persistent organic pollutants (POPs). This study aimed to evaluate the association of couples' preconception exposure to POPs with the SSR. The study cohort comprised 235 couples who were enrolled in the Longitudinal Investigation of Fertility and the Environment (LIFE) Study between 2005 and 2009 prior to conception and prospectively followed through delivery of a singleton birth...
October 30, 2017: Environmental Research
https://www.readbyqxmd.com/read/29096307/organochlorine-pesticides-in-the-sedimentary-core-of-the-southern-tibetan-plateau-the-missing-pieces-induced-by-lateral-remobilization
#20
Jun Li, Guo-Li Yuan, Xu-Chuan Duan, Yong Sun, Hong-Hui Yu, Gen-Hou Wang
The sedimentary core in remote alpine lakes has been recognized as an ideal proxy to reconstruct the emission and air deposition histories of persistent organic pollutants (POPs). Nevertheless, POPs formerly stored in a catchment might also contribute to the variation in the lake sediment by lateral remobilization. In this study, to reveal the relative importance of lateral remobilization, we measured the vertical profiles and isomeric ratios of dichlorodiphenyltrichloroethanes (DDTs), hexachlorocyclohexanes (HCHs) and endosulfan in a dated sedimentary core collected from Lake Yamzho Yumco in the southern Tibetan Plateau...
October 27, 2017: Environmental Pollution
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