| Apportionment of TEQs from four major dioxin sources in Japan on the basis of five indicative congeners. | |
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MedLine Citation:
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PMID: 20888027 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The major sources of dioxins (polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (DL-PCBs)) in the environment in Japan have been considered to be combustion by-products, pentachlorophenol (PCP) formulations, chlornitrofen (CNP, 4-nitrophenyl-2,4,6-trichlorophenyl ether) formulations, and PCB products. Data on PCDDs, PCDFs and DL-PCBs from the four sources were analyzed, and indicative congeners whose concentrations were highly correlated with WHO-2006 toxic equivalencies (TEQs) were identified for each source sample. The indicative congeners for combustion by-products, PCP formulations, and CNP formulations were 2,3,4,7,8-pentachlorodibenzofuran, 1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin, and 1,2,3,7,8-pentachlorodibenzo-p-dioxin, respectively; for PCB products, the indicative congeners were IUPAC Nos. #126- and #105-pentachlorobiphenyls. Moreover, using the data on PCDDs, PCDFs and DL-PCBs, we developed a set of equations for estimating the apportionment of TEQs from the four sources by using only the concentrations of the above-mentioned five indicative congeners. The equations were used along with the analysis results of different types of environmental samples collected from Japan, to determine the TEQ contributions of the four sources. The obtained values of TEQ contributions seemed to be reasonable. The estimation method was developed by using the data on major dioxin sources in Japan, and therefore, it is generally adaptable to environmental samples from any part of Japan. The method may be usable for regions outside Japan if source identification is carried out and the estimation equations are modified appropriately. |
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Authors:
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Kotaro Minomo; Nobutoshi Ohtsuka; Kiyoshi Nojiri; Shigeo Hosono; Kiyoshi Kawamura |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Chemosphere Volume: 81 ISSN: 1879-1298 ISO Abbreviation: Chemosphere Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-18 Completed Date: 2011-01-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0320657 Medline TA: Chemosphere Country: England |
Other Details:
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Languages: eng Pagination: 985-91 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Center for Environmental Science in Saitama, 914 Kamitanadare, Kazo-shi, Saitama 347-0115, Japan. minomo.kotaro@pref.saitama.lg.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Benzofurans
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analysis,
toxicity Dioxins / analysis*, toxicity Environmental Pollutants / analysis*, toxicity Environmental Pollution / statistics & numerical data Japan Polychlorinated Biphenyls / analysis, toxicity Tetrachlorodibenzodioxin / analogs & derivatives, analysis, toxicity |
| Chemical | |
Reg. No./Substance:
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0/Benzofurans; 0/Dioxins; 0/Environmental Pollutants; 0/Polychlorinated Biphenyls; 0/chlorinated dibenzofurans; 0/polychlorodibenzo-4-dioxin; 1746-01-6/Tetrachlorodibenzodioxin |
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