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Persistent organic pollutants

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https://www.readbyqxmd.com/read/28343099/source-apportionments-of-ambient-fine-particulate-matter-in-israeli-jordanian-and-palestinian-cities
#1
Jongbae Heo, Bo Wu, Ziad Abdeen, Radwan Qasrawi, Jeremy A Sarnat, Geula Sharf, Kobby Shpund, James J Schauer
This manuscript evaluates spatial and temporal variations of source contributions to ambient fine particulate matter (PM2.5) in Israeli, Jordanian, and Palestinian cities. Twenty-four hour integrated PM2.5 samples were collected every six days over a 1-year period (January to December 2007) in four cities in Israel (West Jerusalem, Eilat, Tel Aviv, and Haifa), four cities in Jordan (Amman, Aqaba, Rahma, and Zarka), and three cities in Palestine (Nablus, East Jerusalem, and Hebron). The PM2.5 samples were analyzed for major chemical components, including organic carbon and elemental carbon, ions, and metals, and the results were used in a positive matrix factorization (PMF) model to estimate source contributions to PM2...
March 23, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28342994/persistent-organic-pollutants-pops-in-the-atmosphere-of-coastal-areas-of-the-ross-sea-antarctica-indications-for-long-term-downward-trends
#2
Karla Pozo, Tania Martellini, Simonetta Corsolini, Tom Harner, Victor Estellano, Petr Kukučka, Marie D Mulder, Gerhard Lammel, Alessandra Cincinelli
Passive air samplers were used to evaluate long-term trends and spatial distribution of trace organic compounds in Antarctica. Duplicate PUF disk samplers were deployed at six automatic weather stations in the coastal area of the Ross sea (East Antarctica), between December 2010 and January 2011, during the XXVI Italian Scientific Research Expedition. Among the investigated persistent organic compounds, Hexachlorobenzene was the most abundant, with air concentrations ranging from 0.8 to 50 pg m(-3). In general, the following decreasing concentration order was found for the air samples analyzed: HCB > PeCB > PCBs > DDTs > HCHs...
February 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28342592/polychlorinated-biphenyls-pcbs-and-organochlorine-pesticides-ocps-in-sediments-from-an-urban-and-industrial-impacted-subtropical-estuary-babitonga-bay-brazil
#3
Juliane Rizzi, Satie Taniguchi, César C Martins
Babitonga Bay is a large estuary, which has been under pressure from anthropogenic activities coexisting with a natural area of Atlantic rainforest and mangrove systems. The concentration of persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) was determined to evaluate the contamination status and the determine possible pollution sources in the estuary. The ∑DDT (sum of DDT, DDE and DDD concentrations) was the predominant OCP group, with concentrations ranging from <DL (below detection limit) to 122ng g(-1)...
March 23, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28342352/mechanochemical-mechanism-of-rapid-dechlorination-of-hexachlorobenzene
#4
Shanshan Deng, Shaoguo Kang, Nannan Feng, Jianxin Zhu, Bo Yu, Xiaofeng Xie, Jing Chen
Recent researches indicate that mechanochemical treatment (MCT) is a promising method to degrade the environmental hazards, especially in the area of persistent organic pollutants (POPs) disposal. However, the mechanochemical dechlorination mechanism of POPs still needs to be further verified. In this mechanochemical process, hexachlorobenzene (HCB) was chosen as a model pollutant with aluminum and alumina (Al+Al2O3) powders as the co-milling regents. Both of the intermediate analysis and quantum chemical calculations were adopted to elucidate the free radical dechlorination mechanism of HCB...
March 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28329713/pcbs-and-ocps-in-human-milk-in-eastern-siberia-russia-levels-temporal-trends-and-infant-exposure-assessment
#5
Elena A Mamontova, Eugenia N Tarasova, Alexander A Mamontov
The aim of our study is to investigate the spatial distribution of polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), dichlorodiphenyltrichloroethane (p,p'-DDT) and its metabolites, α- and γ-isomers of hexachlorocyclohexane (HCH) in 155 samples of human milk (HM) from Eastern Siberia (six towns and seven villages in Irkutsk Region, one village of the Republic of Buryatia and one town in Zabaikal'sk Region, Russia), and to examine the dietary and social factors influencing the human exposure to the organochlorines...
March 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28316900/influence-of-environmental-factors-on-biodegradation-of-quinalphos-by-bacillus-thuringiensis
#6
Venkata Subba Reddy Gangireddygari, Praveen Kumar Kalva, Khayalethu Ntushelo, Manjunatha Bangeppagari, Arnaud Djami Tchatchou, Rajasekhar Reddy Bontha
BACKGROUND: The extensive and intensive uses of organophosphorus insecticide-quinalphos in agriculture, pose a health hazard to animals, humans, and environment because of its persistence in the soil and crops. However, there is no much information available on the biodegradation of quinalphos by the soil micro-organisms, which play a significant role in detoxifying pesticides in the environment; so research is initiated in biodegradation of quinalphos. RESULTS: A soil bacterium strain, capable of utilizing quinalphos as its sole source of carbon and energy, was isolated from soil via the enrichment method on minimal salts medium (MSM)...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/28314123/which-persistent-organic-pollutants-in-the-rivers-of-the-bohai-region-of-china-represent-the-greatest-risk-to-the-local-ecosystem
#7
Yueqing Zhang, Andrew C Johnson, Chao Su, Meng Zhang, Monika D Jürgens, Yajuan Shi, Yonglong Lu
Freshwater aquatic organisms can be exposed to hundreds of persistent organic pollutants (POPs) discharged by natural and anthropogenic activities. Given our limited resources it is necessary to identify, from the existing evidence, which is the greatest threat so that control measures can be targeted wisely. The focus of this study was to rank POPs according to the relative risk they represent for aquatic organisms in rivers in the Bohai Region, China. A list of 14 POPs was compiled based on the available data on their presence in these rivers and ecotoxicological data...
February 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/28303785/fast-gas-chromatography-with-tandem-mass-spectrometry-analysis-of-selected-persistent-organic-pollutants-and-organophosphorus-and-synthetic-pyrethroid-pesticides-in-indian-prawn-fenneropenaeus-indicus-in-compliance-with-the-eu-mrls
#8
Durvesh Sawant, Jitendra Kelkar, Pratap Rasam, Ajit Datar, Prashant Hase, Dheeraj Handique, Ankush Bhone, Sanket Chiplunkar, Manish Hate
A fast GC with tandem MS method was developed and validated for multiresidue determination of 95 chemical contaminants(24 synthetic pyrethroids, 17 organochlorines, 17 organophosphorus compounds, 18 polycyclic aromatic hydrocarbons, and 19 polychlorinated biphenyls) in Indian prawns (<i>Fenneropenaeus indicus</i>) as per the European Union maximum residual limit requirements. Chromatographic separation and MS determination were achieved within a short run time of 18 min, without compromising sensitivity and specificity...
March 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28301822/elevated-lead-levels-and-changes-in-blood-morphology-and-erythrocyte-cr1-in-preschool-children-from-an-e-waste-area
#9
Yifeng Dai, Xia Huo, Yu Zhang, Tian Yang, Minghui Li, Xijin Xu
Improper dismantling and combustion of electronic waste (e-waste) may release persistent organic pollutants and heavy metals that possess potential risk for human health. Lead (Pb) is carried through the circulatory system by erythrocytes and is known to alter the functions of hematopoietic and immune systems. The aim of the study was to investigate the effect of Pb exposure on blood morphology and erythrocyte complement receptor 1 (CR1) levels as related to immunologic function in preschool children. We recruited 484 preschool children, 2- to 6-years of age, among whom 332 children were from Guiyu, a typical and primitive e-waste processing area, and 152 children from Haojiang (reference area)...
March 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28301147/exposure-to-persistent-organic-pollutants-reduces-testosterone-concentrations-and-affects-sperm-viability-and-morphology-during-the-mating-peak-period-in-a-controlled-experiment-on-farmed-arctic-foxes-vulpes-lagopus
#10
Christian Sonne, Peter A Torjesen, Eva Fuglei, Derek C G Muir, Bjorn M Jenssen, Even Jørgensen, Rune Dietz, Øystein Ahlstrøm
We investigated testosterone production and semen parameters in farmed Arctic foxes by dietary exposure to persistent organic pollutants (POPs) for 22 months. Eight male foxes were given a diet of POP-contaminated minke whale blubber whereas their eight male siblings were fed a control diet containing pig fat as main fat source. The minke whale-based feed contained a ∑POPs concentration of 802 ng/g ww whereas the pig-based feed contained ∑POPs of 24 ng/g ww. At the end of the experiment, ∑POP concentrations in adipose tissue were 8856±2535 ng/g ww in the exposed foxes and 1264±539 ng/g ww in the control foxes...
March 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28300282/stable-nitrogen-and-carbon-isotopes-in-sediments-and-biota-from-three-tropical-marine-food-webs-application-to-chemical-bioaccumulation-assessment
#11
Hui Zhang, Yun Teng, Tra Thi Thanh Doan, Yun Wei Yat, Sheot Harn Chan, Barry C Kelly
Studies of trophodynamics and contaminant bioaccumulation in tropical marine ecosystems are limited. This study employed stable isotope and trace contaminant analysis to assess sources of primary productivity, trophic interactions and chemical bioaccumulation behavior in two mangrove food webs and one offshore coastal marine food web in Singapore. Samples of sediment, phytoplankton, mangrove leaves, clams, snails, crabs, worms, prawns, and fishes were analyzed for stable carbon and nitrogen isotope values, as well as concentrations of persistent organic pollutants...
March 16, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28299406/evaluation-of-the-health-status-of-the-silverside-odontesthes-bonariensis-at-a-ramsar-site-in-south-america
#12
M L Ballesteros, A C Hued, M Gonzalez, K S B Miglioranza, M A Bistoni
The objective of this work was to evaluate the health status of an economic and ecologically important fish species from Mar Chiquita Lake, a RAMSAR site located in Cordoba, Argentina, relative to the levels of selected persistent organic pollutants (POPs) in lake water and fish tissues. Odontesthes bonariensis was used as a model species, and its health was estimated by means of histological indices in gills and liver. Sampling was performed according to rainy and dry seasons (i.e. dry, rainy and post-rainy)...
March 16, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28291591/the-inma-infancia-y-medio-ambiente-environment-and-childhood-project-more-than-10-years-contributing-to-environmental-and-neuropsychological-research
#13
REVIEW
Mireia Gascon, Mònica Guxens, Martine Vrijheid, Maties Torrent, Jesús Ibarluzea, Eduardo Fano, Sabrina Llop, Ferran Ballester, Mariana F Fernández, Adonina Tardón, Ana Fernández-Somoano, Jordi Sunyer
BACKGROUND: In 2003 the INMA-INfancia y Medio Ambiente (Environment and Childhood) project, a Spanish national network of birth cohorts including more than 3500 participants, was set up with the aim to assess the health impacts of pre- and postnatal environmental exposures on children. The project has published more than 60 papers on maternal and environmental factors related to neuropsychological development in children, one of the main research interests within the project. With the present review, we evaluate the evidence provided by the INMA project on this topic and discuss how the data can contribute to cover the challenges that children's environmental health research will face in the coming years...
February 28, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28290573/emerging-investigator-series-dual-role-of-organic-matter-in-the-anaerobic-degradation-of-triclosan
#14
Lin Wang, Shengnan Xu, Bo Pan, Yu Yang
Triclosan (TCS), one of the most widely used antimicrobial agents, has been listed among the top 10 contaminants in US rivers. Environmental persistence, endocrine disruption effects, and the antibiotic resistance induction capacity of TCS attract interest in its environmental fate and degradation. Herein, we found that TCS can be anaerobically degraded at pH 9 by a metal-reducing bacterium, Shewanella putrefaciens CN32. The degradation was substantially facilitated by low-concentration (0-15 mg C per L) organic matter (OM) extracted from a peat soil, whereas TCS degradation was inhibited by further increased concentration (15-100 mg C per L) of OM...
March 14, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28290090/evaluation-of-atrazine-degradation-applied-to-different-energy-systems
#15
EDITORIAL
Ailton J Moreira, Bianca S Pinheiro, André F Araújo, Gian P G Freschi
Atrazine is an herbicide widely used in crops and has drawn attention due to potential pollution present in soil, sediment, water, and food. Since conventional methods are not potentially efficient to persistent degradation of organic compounds, new technology has been developed to remove them, especially practices utilizing advanced oxidation processes (AOPs). This work aims to evaluate the use of different energies (ultraviolet (UV), microwaves (MW), and radiations (MW-UV)) to the herbicide atrazine through the process of photo-oxidation...
March 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28288427/the-trophic-transfer-of-persistent-pollutants-hcb-ddts-pcbs-within-polar-marine-food-webs
#16
Simonetta Corsolini, Gianluca Sarà
Biomagnification (increase in contaminant concentrations at successively higher levels of trophic web), is a process that can transversally impair biodiversity and human health. Most research shows that biomagnification should be higher at poles with northern sites having a major tendency to biomagnify Persistent Organic Pollutants (POPs) through their marine food webs. We investigated the biomagnification degree into two marine trophic webs combining carbon and nitrogen stable isotopes and POP analyses. We showed that the Antarctic trophic web was more depleted than the sub-Arctic one and the differences highlighted for the basal part could explain the difference in length between them...
February 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/28285191/polychlorinated-biphenyls-153-induces-metabolic-dysfunction-through-activation-of-ros-nf-%C3%AE%C2%BAb-signaling-via-downregulation-of-hnf1b
#17
Hao Wu, Weihua Yu, Fansen Meng, Jie Mi, Jie Peng, Jiangzheng Liu, Xiaodi Zhang, Chunxu Hai, Xin Wang
Polychlorinated biphenyls (PCB) is a major type of persistent organic pollutants (POPs) that act as endocrine-disrupting chemicals. In the current study, we examined the mechanism underlying the effect of PCB-153 on glucose and lipid metabolism in vivo and in vitro. We found that PCB-153 induced per se and worsened high fat diet (HFD)-resulted increase of blood glucose level and glucose and insulin intolerance. In addition, PCB-153 induced per se and worsened HFD-resulted increase of triglyceride content and adipose mass...
March 7, 2017: Redox Biology
https://www.readbyqxmd.com/read/28284959/identification-of-sources-and-seasonal-variability-of-organic-matter-in-lake-sihwa-and-surrounding-inland-creeks-south-korea
#18
Yeonjung Lee, Seongjin Hong, Min-Seob Kim, Dahae Kim, Bo-Hyung Choi, Jin Hur, Jong Seong Khim, Kyung-Hoon Shin
Coastal areas are subjected to significant allochthonous organic matter deposits from surrounding areas; however, limited information is available on the source and delivery of this organic matter. In this study, to assess seasonal changes in the sources of organic matter in Lake Sihwa (Korea), biodegradability, fluorescence property, and stable isotopic compositions (carbon, nitrogen, and sulfur) of the organic matter were determined. Water samples were collected from the inner lake (n = 9) and inland creeks (n = 10) in five separate events, from November 2012 to October 2013...
February 28, 2017: Chemosphere
https://www.readbyqxmd.com/read/28284859/molecular-mechanisms-of-3-3-4-4-5-pentachlorobiphenyl-induced-epithelial-mesenchymal-transition-in-human-hepatocellular-carcinoma-cells
#19
Li Song, Linlin Guo, Zhuoyu Li
Polychlorinated biphenyls (PCBs) are classic persistent organic pollutants (POPs). Many studies have found a positive association between the progression of hepatocellular carcinoma (HCC) and PCBs exposure. However, the influence of PCBs on epithelial-mesenchymal transition (EMT) of HCC remains to be unclear. In this study, we explored the effect of PCB126 on EMT in HCC cells and its underlying mechanisms. The data showed that PCB126, exposing both Bel-7402 and SMMC-7721 cells for 48h, promoted EMT that was demonstrated by E-cadherin repression, up-regulation of N-cadherin and vimentin, and morphological alteration...
March 8, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28283410/insecticide-pyrethroids-in-liver-of-striped-dolphin-from-the-mediterranean-sea
#20
Òscar Aznar-Alemany, Joan Giménez, Renaud de Stephanis, Ethel Eljarrat, Damià Barceló
Pyrethroid pesticides were analysed in liver of striped dolphin (Stenella coeruleoalba) from the Alboran Sea (south of Spain, Mediterranean Sea). The occurrence and bioaccumulation of pyrethroid insecticides in marine mammal tissues from the northern hemisphere had never been determined before. Pyrethroids were detected in 87% of the specimens with a mean total concentration of 300 ng g(-1) lw ± 932 (range 2.7-5200 ng g(-1) lw). Permethrin and tetramethrin were the main contributors to the pyrethroid profiles, with enantiospecific accumulation for the first and isomer specific accumulation for the latter...
March 7, 2017: Environmental Pollution
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