Polychlorinated Dibenzo-p-Dioxin and Dibenzofuran in Aerial Deposition

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/PCDFs) in aerial deposition were investigated. The dry-wet deposition (total amounts of dry and wet deposition) was collected into the jug with a glass funnel opened over a sampling period, and the wet-only deposition was collected into the...

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Published inJournal of Environmental Chemistry Vol. 2; no. 4; pp. 849 - 855
Main Authors KUROKAWA, Youichi, MATSUEDA, Takahiko, OSAKI, Yasuhiko, YANAGAWA, Masao
Format Journal Article
LanguageEnglish
Published Japan Society for Environmental Chemistry 1992
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Summary:Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/PCDFs) in aerial deposition were investigated. The dry-wet deposition (total amounts of dry and wet deposition) was collected into the jug with a glass funnel opened over a sampling period, and the wet-only deposition was collected into the jug equipped with a automatic wet-only collector. The concentration of total PCDDs and PCDFs in the dry-wet deposition were 91-559pg/l, and those in the wetonly deposition were 34pg/l and 25pg/l, respectively. The PCDD/PCDF fluxes in the dry-wet deposition were estimated to be 436-1206ng/m2/year (3.5-13.7ng (TEQ) /m2/year), and those in the wet-only deposition were 56ng/m2/year and 42ng/m2/year (0.10ng (TEQ) /m2/year and 0.13ng (TEQ) /m2/year, respectively) . The PCDD/PCDF fluxes for the dry-wet deposition were evaluated to be 10-30 times (30-100 times, TEQs) higher than those for the wet-only deposition. These results suggest that the dry deposition is the predominant pathway of PCDDs/DFs removal from the atmosphere.
ISSN:0917-2408
1882-5818
DOI:10.5985/jec.2.849