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Persistent organic pollutants

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https://www.readbyqxmd.com/read/28622970/congener-specific-determination-of-ultratrace-levels-of-chlorinated-and-brominated-polycyclic-aromatic-hydrocarbons-in-atmosphere-and-industrial-stack-gas-by-isotopic-dilution-gas-chromatography-high-resolution-mass-spectrometry-method
#1
Rong Jin, Guorui Liu, Minghui Zheng, Heidelore Fiedler, Xiaoxu Jiang, Lili Yang, Xiaolin Wu, Yang Xu
Isotopic dilution gas chromatography combined with high resolution mass spectrometry (GC/HRMS) has overwhelming advantages with respect to the accuracy of congener-specific ultratrace analysis of complex persistent organic pollutants (POPs) in environmental matrices. However, an isotopic dilution GC/HRMS method for analysis of chlorinated and brominated polycyclic aromatic hydrocarbons (Cl-PAHs and Br-PAHs) using (13)C-labelled congeners as internal standards has not been established. In this study, a method for identification and quantification of 38 congeners of Cl-PAHs and Br-PAHs in atmosphere and stack gas samples from waste incinerators was developed using the isotopic dilution GC/HRMS technique...
June 10, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28618302/growth-and-physiological-responses-of-a-marine-diatom-phaeodactylum-tricornutum-against-two-imidazolium-based-ionic-liquids-c4mim-bf4-and-c8mim-bf4
#2
Xiang-Yuan Deng, Biao Chen, Da Li, Xiao-Li Hu, Jie Cheng, Kun Gao, Chang-Hai Wang
Ionic liquids (ILs) have been considered as "green" substitutes for traditional organic solvents in many existing biological and chemical areas. However, they have high solubility and poor biodegradability in water, suggesting that they could become persistent chemical pollutants in aquatic environment. The ability of two widely used imidazolium-based ILs to affect the growth and physiological characteristics of a marine diatom (Phaeodactylum tricornutum) was investigated in this study. The diatom was exposed to different concentrations of 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim]BF4) and 1-octyl-3-methylimidazolium tetrafluoroborate ([C8mim]BF4) for 96h within a batch-culture system...
May 31, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28618081/loss-of-the-ssra-genome-island-led-to-partial-debromination-in-the-pbde-respiring-dehalococcoides-mccartyi-strain-gy50
#3
Chang Ding, Matthew J Rogers, Kun-Lin Yang, Jianzhong He
Polybrominated diphenyl ethers (PBDEs), chemicals commonly used as flame-retardants in consumer products, are emerging persistent organic pollutants that are ubiquitous in the environment. In this study, we report the PBDE-respiring isolate - Dehalococcoides mccartyi strain GY50, which debrominates the most toxic tetra- and penta-BDE congeners (∼1.4 µM) to diphenyl ether within 12 days with hydrogen as the electron donor. The complete genome sequence revealed 26 reductive dehalogenase homologous genes (rdhAs), among which three genes (pbrA1, pbrA2, and pbrA3) were highly expressed during PBDE debromination...
June 15, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28617596/review-of-organic-wastewater-compound-concentrations-and-removal-in-onsite-wastewater-treatment-systems
#4
Laurel A Schaider, Kathryn M Rodgers, Ruthann A Rudel
Onsite wastewater treatment systems, such as septic systems, serve 20% of U.S. households and are common in areas not served by wastewater treatment plants (WWTPs) globally. They can be sources of nutrients and pathogen pollution and have been linked to health effects in communities where they contaminate drinking water. However, few studies have evaluated their ability to remove organic wastewater compounds (OWCs) such as pharmaceuticals, hormones, and detergents. We synthesized results from 20 studies of 45 OWCs in conventional drainfield-based and alternative onsite wastewater treatment systems to characterize concentrations and removal...
June 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28616735/erratum-to-temporal-trends-of-lipophilic-persistent-organic-pollutants-in-serum-from-danish-nulliparous-pregnant-women-2011-2013
#5
Christian Bjerregaard-Olesen, Manhai Long, Mandana Ghisari, Bodil H Bech, Ellen A Nohr, Niels Uldbjerg, Tine B Henriksen, Jørn Olsen, Eva C Bonefeld-Jørgensen
No abstract text is available yet for this article.
June 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28610584/serum-levels-of-environmental-pollutants-is-a-risk-factor-for-breast-cancer-in-inuit-a-case-control-study
#6
Maria Wielsøe, Peder Kern, Eva Cecilie Bonefeld-Jørgensen
BACKGROUND: Environmental Persistent Organic Pollutants (POPs) can alter the hormone homeostasis by mimicking, interfering or blocking the function of hormones; moreover POPs are hypothesized to modify the risk of breast cancer. The association between POPs and breast cancer has been widely studied but the conclusions are inconsistent. The present study examined the associations between serum levels of POPs and breast cancer with focus on the highly exposed Greenlandic Inuit population...
June 13, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28605873/associations-of-urban-environmental-pollution-with-health-related-physiological-traits-in-a-free-living-bird-species
#7
Petra Bauerová, Jitka Vinklerová, Jakub Hraníček, Vojtěch Čorba, Libor Vojtek, Jana Svobodová, Michal Vinkler
Urban environmental pollution results in contamination of the tissues of synanthropic organisms by toxic trace elements with potential impacts on human health. Passerine birds may serve as convenient indicators of such contamination. In this study we investigated the effect of blood and plumage contamination with heavy metals (lead Pb, cadmium Cd, copper Cu, chromium Cr) and arsenic metalloid (As) on condition, health and ornamental colour in free-living great tit (Parus major) males from 13 cities across the Czech Republic (EU), mist netted during the early breading season (April-May)...
June 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605331/classification-source-and-effect-of-environmental-pollutants-and-their-biodegradation
#8
REVIEW
Blessy Baby Mathew, Himani Singh, Vinai George Biju, N B Krishnamurthy
Any foreign chemical substance that is unusually present within an organism or is unexpectedly found in the environment at a higher concentration than the permissible limits can be termed a xenobiotic or a pollutant. Such substances include carcinogens, drugs, food additives, hydrocarbons, dioxins, polychlorinated biphenyls, pesticides or even some natural compounds. Pollutants are known for their higher persistence and pervasiveness, and along with their transformed products, they can remain in and interact with the environment for prolonged periods...
2017: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/28599370/comparisons-of-field-and-laboratory-estimates-of-risk-of-ddts-from-contaminated-sediments-to-humans-that-consume-fish-in-palos-verdes-california-usa
#9
Scott Coffin, Jay Gan, Daniel Schlenk
Calculating risk from seafood exposure to persistent organic pollutants continues to be problematic as estimates of exposure from diet require extensive monitoring of fish species and limited assessments of bioavailability from sediments where the contaminants tend to reside. Previous studies in our laboratory utilized a laboratory-based isotope dilution method (IDM) to estimate the bioavailability of DDT [1,1,1-trichloro-2, 2-bis(p-chloro-phenyl)ethane] and its metabolites from sediment to biota from a superfund site on the shelf of the Palos Verdes (PVS) Peninsula in California (USA)...
June 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28599207/mercury-and-persistent-organic-pollutants-in-native-and-invading-forage-species-of-the-canadian-arctic-consequences-for-food-web-dynamics
#10
Sara Pedro, Aaron T Fisk, Gregg T Tomy, Steven H Ferguson, Nigel E Hussey, Steven T Kessel, Melissa A McKinney
Contaminant dynamics within Arctic marine food webs may be altered through the climate-driven northward invasions of temperate/boreal species. Here, we compare tissue concentrations of total mercury (THg) and legacy and emerging persistent organic pollutants (POPs) in native versus invading forage species sampled from 2012 to 2014 near Arviat, Clyde River, and Resolute Bay, NU, representing, low, mid- and high eastern Canadian Arctic regions, respectively. Concentrations of THg, legacy Σ-polychlorinated biphenyls (ΣPCB) and Σ-organochlorine (ΣOC) pesticides were detected in all forage species, whereas emerging halogenated flame retardants were detected in only a few individuals...
June 6, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28593369/miniaturised-sample-preparation-method-for-the-multiresidual-determination-of-regulated-organohalogenated-pollutants-and-related-compounds-in-wild-bird-eggs
#11
Jose L Roscales, Alba Vicente, Lourdes Ramos, Begoña Jiménez
A simplified, miniaturised matrix solid-phase dispersion (MSPD)-based method allowing the simultaneous extraction and purification of contaminants belonging to selected families of regulated persistent organic pollutants (POPs), i.e. polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and penta- to octa-polybrominated diphenyl ethers (PBDEs), and related contaminants of emerging concern, such as deca-BDE and Dechlorane Plus (DP), has been proposed. Wild bird eggs were used as biotic fat-containing model matrices...
June 7, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28588565/diversity-of-ligninolytic-enzymes-and-their-genes-in-strains-of-the-genus-ganoderma-applicable-for-biodegradation-of-xenobiotic-compounds
#12
Giselle Torres-Farradá, Ana M Manzano León, François Rineau, Lucía L Ledo Alonso, María I Sánchez-López, Sofie Thijs, Jan Colpaert, Miguel Ramos-Leal, Gilda Guerra, Jaco Vangronsveld
White-rot fungi (WRF) and their ligninolytic enzymes (laccases and peroxidases) are considered promising biotechnological tools to remove lignin related Persistent Organic Pollutants from industrial wastewaters and contaminated ecosystems. A high diversity of the genus Ganoderma has been reported in Cuba; in spite of this, the diversity of ligninolytic enzymes and their genes remained unexplored. In this study, 13 native WRF strains were isolated from decayed wood in urban ecosystems in Havana (Cuba). All strains were identified as Ganoderma sp...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28585196/obesity-persistent-organic-pollutants-and-related-health-problems
#13
Loukia Vassilopoulou, Christos Psycharakis, Demetrios Petrakis, John Tsiaoussis, Aristides M Tsatsakis
The present review aims to delve into persistent organic pollutants (POPs) , as xenobiotics, in correlation to human health. POPs exhibit a group of common characteristics, including lipophilicity, persistence to decomposition and bioaccumulation in tissues. POPs have been thoroughly studied by former researchers, as they offer a particular interest in the elucidation of metabolic, endocrine and immune perturbation caused by their synergy with intracellular mechanisms. Herein particular focus is attributed to the relationship of POPs with obesity provocation...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28576431/corrigendum-to-persistent-organic-pollutants-in-juvenile-magellanic-penguins-spheniscus-magellanicus-in-south-america-chemosphere-149-2016-391-399
#14
P Baldassin, S Taniguchi, H Gallo, A Maranho, C Kolesnikovas, D B Amorim, M Mansilla, R M Navarro, L C Tabeira, M C Bicego, R C Montone
No abstract text is available yet for this article.
May 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/28573478/polycyclic-aromatic-hydrocarbons-a-critical-review-of-environmental-occurrence-and-bioremediation
#15
Oluwadara Oluwaseun Alegbeleye, Beatrice Oluwatoyin Opeolu, Vanessa Angela Jackson
The degree of polycyclic aromatic hydrocarbon contamination of environmental matrices has increased over the last several years due to increase in industrial activities. Interest has surrounded the occurrence and distribution of polycyclic aromatic hydrocarbons for many decades because they pose a serious threat to the health of humans and ecosystems. The importance of the need for sustainable abatement strategies to alleviate contamination therefore cannot be overemphasised, as daily human activities continue to create pollution from polycyclic aromatic hydrocarbons and impact the natural environment...
June 1, 2017: Environmental Management
https://www.readbyqxmd.com/read/28570991/from-antarctica-to-the-subtropics-contrasted-geographical-concentrations-of-selenium-mercury-and-persistent-organic-pollutants-in-skua-chicks-catharacta-spp
#16
Alice Carravieri, Yves Cherel, Maud Brault-Favrou, Carine Churlaud, Laurent Peluhet, Pierre Labadie, Hélène Budzinski, Olivier Chastel, Paco Bustamante
Seabirds integrate bioaccumulative contaminants via food intake and have revealed geographical trends of contamination in a variety of ecosystems. Pre-fledging seabird chicks are particularly interesting as bioindicators of chemical contamination, because concentrations in their tissues reflect primarily dietary sources from the local environment. Here we measured 14 trace elements and 18 persistent organic pollutants (POPs) in blood of chicks of skuas that breed in four sites encompassing a large latitudinal range within the southern Indian Ocean, from Antarctica (Adélie Land, south polar skua Catharacta maccormicki), through subantarctic areas (Crozet and Kerguelen Islands, brown skua C...
May 29, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28567424/effect-of-naringenin-quercetin-and-sesamin-on-xenobiotica-metabolizing-cyp1a-and-cyp3a-in-mice-offspring-after-maternal-exposure-to-persistent-organic-pollutants
#17
Nadezhda Pilipenko, Erik Ropstad, Ruth Halsne, Galia Zamaratskaia
The aim of the present study was to evaluate in vitro effects of dietary phytochemicals naringenin, quercetin, and sesamin on the activities of ethoxy- (EROD; CYP1A) and benzyloxy- (BROD; CYP3A) resorufin O-dealkylases after the exposure to the cocktail of persistent organic pollutants (POPs). CD-1 mice were exposed from weaning, through gestation and lactation to a defined mixture of POPs. Hepatic microsomes were prepared from their female offspring at postnatal day 42. Hepatic EROD and BROD activity were evaluated in the presence of quercetin, naringenin, and sesamin at nine concentrations from 5 to 100000 nM...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28567415/neurodevelopmental-disorders-and-environmental-toxicants-epigenetics-as-an-underlying-mechanism
#18
REVIEW
Nguyen Quoc Vuong Tran, Kunio Miyake
The increasing prevalence of neurodevelopmental disorders, especially autism spectrum disorders (ASD) and attention deficit hyperactivity disorder (ADHD), calls for more research into the identification of etiologic and risk factors. The Developmental Origin of Health and Disease (DOHaD) hypothesizes that the environment during fetal and childhood development affects the risk for many chronic diseases in later stages of life, including neurodevelopmental disorders. Epigenetics, a term describing mechanisms that cause changes in the chromosome state without affecting DNA sequences, is suggested to be the underlying mechanism, according to the DOHaD hypothesis...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28556591/preparation-of-magnetic-molecularly-imprinted-polymers-for-the-rapid-and-selective-separation-and-enrichment-of-perfluorooctane-sulfonate
#19
Lingling Du, Yongqiong Wu, Xiaoli Zhang, Fang Zhang, Xianping Chen, Zhen Cheng, Fei Wu, Kejun Tan
As a persistent organic pollutant, perfluorooctane sulfonate has drawn great worldwide attention. In this contribution, a novel material of magnetic molecularly imprinted polymers based on perfluorooctane sulfonate as template molecule was prepared. The magnetic molecularly imprinted polymers were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and vibrating sample magnetometry. The adsorption isotherm was measured, and adsorption kinetic tests were conducted...
May 27, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28549437/p-p-ddt-induces-testicular-oxidative-stress-induced-apoptosis-in-adult-rats
#20
Neila Marouani, Dorsaf Hallegue, Mohsen Sakly, Moncef Benkhalifa, Khémais Ben Rhouma, Olfa Tebourbi
BACKGROUND: The 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (p,p'-DDT) is a known persistent organic pollutant and male reproductive toxicant. The present study is designed to test the hypothesis that oxidative stress mediates p,p'-DDT-induced apoptosis in testis. METHODS: Male Wistar rats received an intraperitoneal (ip) injection of the pesticide at doses of 50 and 100mg/kg for 10 consecutive days. The oxidative stress was evaluated by biomarkers such lipid peroxidation (LPO) and metallothioneins (MTs) levels...
May 26, 2017: Reproductive Biology and Endocrinology: RB&E
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