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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/10798


    Title: Dry and Wet Deposition of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans on the Drinking Water Treatment Plant
    Authors: Long-Full Lin(林龍富)
    Shun-I Shih
    Jen-Wei Su
    Minliang Shih
    Kuo-Ching Lin
    Lin-Chi Wang
    Guo-Ping Chang-Chien
    Contributor: 圖書資訊館
    Keywords: Dioxins
    Source water
    Tap water
    Dry deposition
    Wet deposition
    Date: 2010
    Issue Date: 2010-09-13 15:40:46 (UTC+8)
    Abstract: This study investigated the concentrations and congener profiles of polychlorinated dibenzo-p-dioxins (PCDDs) and
    polychlorinated dibenzofurans (PCDFs) in intake source water (source water) and tap drinking water (tap water) of
    drinking water treatment plants (DWTPs). In order to have a better understanding on the influence of atmospheric PCDD/F
    deposition on drinking water, PCDD/Fs in the ambient air of a DWTP (DWTP-LN) were measured and both dry and wet
    deposition on the water treatment facilities were assessed. The results of this study indicated that the mean PCDD/F
    concentration in tap water (0.0039 pg WHO-TEQ/L) was found to be approximately 55% of magnitude less than that in
    source water (0.0086 pg WHO-TEQ/L). In addition, the total deposition flux (dry + wet) of PCDD/Fs entering the
    DWTP-LN was 27.0 ng I-TEQ/m2-year, and wet and dry deposition contributed approximately 12.0% and 88%,
    respectively. It reveals that dry deposition is more important than wet deposition of PCDD/Fs in the ambient air of
    DWTP-LN. Atmospheric deposition of PCDD/Fs will increase the level in source water of DWTP-LN up to 8.91 × 10-3 pg
    I-TEQ/L, which is approximately 92% of the PCDD/Fs in source water. If a removal efficiency of 87% is achieved by
    conventional treatment processes including coagulation, flocculation, sedimentation and rapid sand filtration, the water
    after treatment may increase 1.16 × 10–3 pg I-TEQ/L, which is approximately 43% of the concentration level in tap water.
    These results indicate that in the DWTP-LN, the influence of atmospheric deposition of PCDD/Fs on the drinking water is
    of great significance, and water treatment facility with a cover is suggested.
    Relation: Aerosol and Air Quality Research, 10: 231–244
    Appears in Collections:[Graduate School and Department of Environmental Engineering] Periodical Articles

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