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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/5795

    Title: Atmospheric deposition of polychlorinated dibenzo-p-dioxins and dibenzofurans on the soils in the vicinity of municipal solid waste incinerators
    Authors: YEE-LIN WU
    LONG-FULL LIN(林龍富)
    Keywords: PCDDs
    atmospheric wet deposition
    Date: 2009
    Issue Date: 2009-11-18 09:28:50 (UTC+8)
    Abstract: This study focuses on the atmospheric deposition of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) on the soils
    in the vicinity of two municipal solid waste incinerators (MSWIs), which were located in the Gangshan (GS) and the Renwu (RW)
    Townships of southern Taiwan. PCDD/Fs in the soils were sampled simultaneously with those in the ambient air and analyzed for 17
    2,3,7,8-substituted PCDD/Fs. The results showthat the mean contents of PCDD/Fs in the soils near MSWI-GS and MSWI-RWwere
    2.65 and 1.20 ng I-TEQ/kg dry weight, respectively. Annual wet deposition fluxes of total PCDD/Fs were 119 and 113 ng/m2-year in
    the ambient air near MSWI-GS and MSWI-RW, respectively. The results obtained in this study are much higher than those estimated
    for the Atlantic Ocean, where the average wet deposition was only 45 ng/m2-year. The annual dry deposition fluxes accounted for
    58.2 and 66.7%, respectively, indicating that dry deposition was more dominant than wet deposition in the atmospheric deposition
    processes. The congener profiles of 17 2,3,7,8-substituted PCDD/Fs showed that OCDD dominates in the soils. The contributions
    of OCDD in the soils near MSWI-GS and MSWI-RW were 73.4 and 67.1%, respectively, while they were only 41.4 and 31.2% in
    the atmospheric deposition, respectively. These results imply that OCDD is more persistent in the environment than other congeners.
    The results of the present study strongly suggest that exposure to PCDD/Fs in these areas should be reduced.
    Appears in Collections:[環境工程系所] 期刊論文

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