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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
#1
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/29137744/luminescence-electrochemical-and-photocatalytic-properties-of-sub-micron-nickel-ii-and-cobalt-ii-coordination-polymers-synthesized-by-sonochemical-process
#2
Jun Xuan Li, Yu Feng Li, Li Wei Liu, Guang Hua Cui
Submicron structures of Ni(II)/Co(II)-based coordination polymers (CPs) [Ni(L1)(mip)·H2O]n (1) and {[Co(L2)(mip)]·0·.5H2O}n(2) (L1=1,6-bis(5,6-dimethylbenzimidazole)hexane, L2=1,6-bis(benzimidazole)hexane, H2mip=5-methylisophthalic acid) were obtained by ultrasonic irradiation and structurally characterized by elemental analysis, powder X-ray diffraction and scanning electron microscopy. Structural analysis show that two CPs feature uninodal 3-connected 2D hcb layer, whilst CP 2 is further extended into a 3D complicated supramolecular network by C14-H14⋯O2 hydrogen bonds...
March 2018: Ultrasonics Sonochemistry
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
#3
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/29128804/hexachlorobenzene-as-a-persistent-organic-pollutant-toxicity-and-molecular-mechanism-of-action
#4
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/29120176/persistent-organic-pollutants-in-the-east-antarctic-atmosphere-inter-annual-observations-from-2010-2015-using-high-flow-through-passive-sampling
#5
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/29119258/in-focus-in-hcb
#6
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
November 9, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29107350/dynamics-of-persistent-organic-pollutants-in-obese-adolescents-during-weight-loss
#7
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/29105816/comparison-of-laboratory-derived-biomagnification-factors-for-hexachlorobenzene-in-common-carp-conducted-under-nine-test-conditions
#8
Naoki Hashizume, Yoshiyuki Inoue, Yasuyuki Suzuki, Hidekazu Murakami, Shinichiro Sumi, Takeshi Ishibashi, Tomohiko Yoshida
Nine dietary exposure bioaccumulation fish tests with hexachlorobenzene (HCB) were conducted with common carp to explore how differences in test conditions (different test foods and feeding rates) influenced the lipid-corrected, growth-corrected kinetic BMF (BMFKgL ) value (BMFKgL = BMFKg ×lipid content of test food / lipid content of test fish). The BMFKgL values for HCB differed by approximately a factor of 5 among the tests. The average, median, 95% confidential interval, and coefficient of variation of the BMFKgL values were 0...
November 4, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29100182/transplacental-transfer-characteristics-of-organochlorine-pesticides-in-paired-maternal-and-cord-sera-and-placentas-and-possible-influencing-factors
#9
Xiaolan Zhang, Xia Wu, Bingli Lei, Ye Jing, Zi'an Jiang, Xinyu Zhang, Xiangming Fang, Yingxin Yu
Organochlorine pesticides (OCPs), including dichlorodiphenyltrichloroethane (DDT) and its metabolites [dichlorodiphenyldichloroethylene (DDE) and dichlorodiphenyldichloroethane], hexachlorocyclohexanes (HCHs), and hexachlorobenzene (HCB), are widely detected in humans despite the considerable decline in environmental concentrations. To understand the placental transfer of OCPs and the possible maternal influence on them, we measured the concentrations of DDTs, HCHs, and HCB in 102 paired samples of maternal and cord sera, and placentas collected in Shanghai, China...
October 31, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29074243/assessing-the-environmental-quality-of-sediments-from-split-coastal-area-croatia-with-a-battery-of-cell-based-bioassays
#10
Maria Blanco, Elisabet Pérez-Albaladejo, Benjamí Piña, Grozdan Kušpilić, Vesna Milun, Roger Lille-Langøy, Odd André Karlsen, Anders Goksøyr, Cinta Porte
A battery of cell-based bioassays, including PLHC-1 cells, zebrafish-Pxr-transfected COS-7 cells and estrogen receptor-recombinant yeast assay (ER-RYA), were applied to detect the presence of bioactive pollutants in sediments collected from Kaštela Bay and Brač Channel (Croatia). Exposure of PLHC-1 cells to the sediment extracts evidenced significant cytotoxicity and presence of CYP1A inducers in sediments collected in Kaštela Bay, near the industrial zone and cargo port of Split. Sediments from this area, which is highly contaminated with PCBs, HCB, DDTs and γ-HCH, also activated the zebrafish Pxr (zfPxr) reporter system...
October 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29054084/occurrence-and-levels-of-persistent-organic-pollutants-pops-in-farmed-and-wild-marine-fish-from-tanzania-a-pilot-study
#11
Eliezer Brown Mwakalapa, Aviti John Mmochi, Mette Helen Bjorge Müller, Robinson Hammerthon Mdegela, Jan Ludvig Lyche, Anuschka Polder
In 2016, farmed and wild milkfish (Chanos chanos) and mullet (Mugil cephalus) from Tanzania mainland (Mtwara) and Zanzibar islands (Pemba and Unguja) were collected for analyses of persistent organic pollutants (POPs). Fish livers were analysed for organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs). Muscle tissue was used for analyses of perfluoroalkyl substances (PFASs). The major contaminant was p,p'-DDE. The highest p,p'-DDE concentration was found in wild milkfish from Mtwara (715...
September 26, 2017: Chemosphere
https://www.readbyqxmd.com/read/29049391/modelling-individual-tree-height-to-crown-base-of-norway-spruce-picea-abies-l-karst-and-european-beech-fagus-sylvatica-l
#12
Ram P Sharma, Zdeněk Vacek, Stanislav Vacek, Vilém Podrázský, Václav Jansa
Height to crown base (HCB) of a tree is an important variable often included as a predictor in various forest models that serve as the fundamental tools for decision-making in forestry. We developed spatially explicit and spatially inexplicit mixed-effects HCB models using measurements from a total 19,404 trees of Norway spruce (Picea abies (L.) Karst.) and European beech (Fagus sylvatica L.) on the permanent sample plots that are located across the Czech Republic. Variables describing site quality, stand density or competition, and species mixing effects were included into the HCB model with use of dominant height (HDOM), basal area of trees larger in diameters than a subject tree (BAL- spatially inexplicit measure) or Hegyi's competition index (HCI-spatially explicit measure), and basal area proportion of a species of interest (BAPOR), respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28988099/chlorinated-persistent-organic-pollutants-in-serum-of-new-zealand-adults-2011-2013
#13
J Coakley, P Bridgen, M N Bates, J Douwes, A 't Mannetje
A national survey was conducted in 2011-2013 to assess serum concentrations of persistent organic pollutants (POPs) in adult New Zealanders. Participants were randomly selected from the 2010 Electoral Roll within 64 demographic strata according to 4 age groups, 4 regions, 2 ethnic groups (Māori/non-Māori) and gender. Eligible subjects (n=734) donated up to 30ml of blood, after which serum was pooled (n=49) according to demographic strata prior to analysis by GC-HRMS. Associations between demographic variables (age, region, ethnicity, gender) and serum POPs were assessed using linear regression...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28985618/intake-of-ddt-and-its-metabolites-through-food-items-among-reproductive-age-women-in-bangladesh
#14
Rehnuma Haque, Tsukasa Inaoka, Miho Fujimura, Akhtar Sk Ahmad, Daisuke Ueno
This study was conducted to make clear the major intake route of DDT in Bangladesh people to develop strategy and policy that could lead to a reduction in body burden especially in the reproductive age women. The concentrations of several POPs (DDT, PCBs, chlordanes, HCHs, HCB, and PeCB) were quantified in food items, human breast milk and house dust collected in Bangladesh in 2011-2012. Among the POPs analyzed in this study, DDT and its metabolites (ΣDDT) showed the highest concentration. The highest median ΣDDT concentration was found in meat (1...
September 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28964601/residues-of-hexachlorobenzene-and-chlorinated-cyclodiene-pesticides-in-the-soils-of-the-campanian-plain-southern-italy
#15
Chengkai Qu, Stefano Albanese, Annamaria Lima, Jiji Li, Angela L Doherty, Shihua Qi, Benedetto De Vivo
A systematic grid sampling method and geostatistics were employed to investigate the spatial distribution, inventory, and potential ecological and human health risks of the residues of hexachlorobenzene (HCB) and chlorinated cyclodiene pesticides in soils of the Campanian Plain, Italy, and explore their relationship with the soils properties. The geometric mean (Gmean) concentrations of HCB and cyclodiene compounds followed the order CHLs (heptachlor, heptachlor epoxide, trans-chlordane, and cis-chlordane) > DRINs (aldrin, dieldrin, and endrin) > SULPHs (α-endosulfan, β-endosulfan, and endosulfan sulfate) > HCB...
December 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28942276/augmenting-atrazine-and-hexachlorobenzene-degradation-under-different-soil-redox-conditions-in-a-bioelectrochemistry-system-and-an-analysis-of-the-relevant-microorganisms
#16
Hui Wang, Xian Cao, Lei Li, Zhou Fang, Xianning Li
Soil microbial fuel cells (MFCs) are a sustainable technology that degrades organic pollutants while generating electricity. However, there have been no detailed studies of the mechanisms of pollutant degradation in soil MFCs. In this study, the effects of external resistance and electrode effectiveness on atrazine and hexachlorobenzene (HCB) degradation were evaluated, the performance of soil MFCs in the degradation of these pollutants under different soil redox conditions was assessed, and the associated microorganisms in the anode were investigated...
January 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28936549/in-focus-in-hcb
#17
EDITORIAL
Douglas J Taatjes, Jürgen Roth
No abstract text is available yet for this article.
November 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28923513/a-dioxin-like-compound-induces-hyperplasia-and-branching-morphogenesis-in-mouse-mammary-gland-through-alterations-in-tgf-%C3%AE-1-and-aryl-hydrocarbon-receptor-signaling
#18
Noelia Miret, Eva Rico-Leo, Carolina Pontillo, Elsa Zotta, Pedro Fernández-Salguero, Andrea Randi
Hexachlorobenzene (HCB) is a widespread environmental pollutant and a dioxin-like compound that binds weakly to the aryl hydrocarbon receptor (AhR). Because AhR and transforming growth factor β1 (TGF-β1) converge to regulate common signaling pathways, alterations in this crosstalk might contribute to developing preneoplastic lesions. The aim of this study was to evaluate HCB action on TGF-β1 and AhR signaling in mouse mammary gland, through AhR+/+ and AhR-/- models. Results showed a differential effect in mouse mammary epithelial cells (NMuMG), depending on the dose: 0...
November 1, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28892854/tissue-distribution-and-maternal-transfer-of-persistent-organic-pollutants-in-kentish-plovers-charadrius-alexandrines-from-cangzhou-wetland-bohai-bay-china
#19
Shucheng Zheng, Pu Wang, Huizhong Sun, Julius Matsiko, Yanfen Hao, Derong Meng, Yingming Li, Guogang Zhang, Qinghua Zhang, Guibin Jiang
Several persistent organic pollutants, including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and organochlorine pesticides (OCPs), were comprehensively investigated in the egg, muscle and liver samples of Kentish Plover (Charadrius alexandrines) collected from Cangzhou Wetland in western Bohai Bay, China. DDTs were the most abundant contaminants (35.4-9853ngg(-1) lipid weight, lw), followed by HCHs, PCBs, PBDEs and HCB...
January 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28869886/persistent-organic-pollutants-in-red-crowned-cranes-grus-japonensis-from-hokkaido-japan
#20
Kensaku Kakimoto, Kazuhiko Akutsu, Haruna Nagayoshi, Yoshimasa Konishi, Keiji Kajimura, Naomi Tsukue, Tomoo Yoshino, Fumio Matsumoto, Takeshi Nakano, Ning Tang, Kazuichi Hayakawa, Akira Toriba
The red-crowned crane (Grus japonensis) from eastern Hokkaido is classified as a Special Natural Monument in Japan. In this study, we determined the concentrations of persistent organic pollutants (POPs) in red-crowned crane muscle tissues (n = 47). Polychlorinated biphenyls (PCBs) had the highest median concentration (240ng/g lipid weight), followed by dichlorodiphenyltrichloroethane and its metabolites (DDTs) (150ng/g lipid weight), chlordane-related compounds (CHLs) (36ng/g lipid weight), hexachlorobenzene (HCB) (16ng/g lipid weight), hexachlorocyclohexanes (HCHs) (4...
January 2018: Ecotoxicology and Environmental Safety
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