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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/28514


    標題: Atmospheric Deposition Modeling of Polychlorinated Dibenzo-p-dioxins, Dibenzofurans and Polychlorinated Biphenyls in the Ambient Air of Southern Taiwan. Part I. Dry Depositions
    作者: Tseng, Yu-Jung
    Mi, Hsiao-Hsuan
    Hsieh, Lien-Te
    Liao, Wei-Tung
    Chang-Chien, Guo-Ping
    貢獻者: 環境工程與科學系
    關鍵字: Polychlorinated dibenzo-p-dioxins
    Dibenzofurans
    Polychlorinated biphenyls
    Dry deposition
    Atmosphere
    日期: 2014-12
    上傳時間: 2015-05-06 21:19:01 (UTC+8)
    出版者: Taiwan Assoc Aerosol Res-Taar
    摘要: Atmospheric deposition, including dry and wet deposition, is a primary pathway for the transfer of POPs to terrestrial and aquatic ecosystems. In this study (that is, the part I.), the characteristics of PCDD/Fs and PCBs in the ambient air of Tainan City were simulated by the PM10 versus PCDD/Fs concentration regression analysis, gas-particle partition modeling, and the simulation of dry deposition. Dry deposition fluxes are obtained from the combination of the PCDD/F and PCB concentrations, meteorological information, dry deposition velocities, and scavenging ratios. The dry deposition fluxes of PCDD/F-TEQ2005 increase with decreasing temperature, while increase with a higher degree of chlorine numbers on PCDD/F homologues. In this study (that is, the part I.), the average PCDD/F dry deposition fluxes in spring, summer, fall and winter were 69.3, 28.2, 129 and 246 pg WHO-TEQ/m(2)-month during 2012, respectively. As for 2013, the average PCDD/F dry deposition fluxes in spring, summer, fall and winter were 67.0, 29.8, 102 and 377 pg WHO-TEQ/m(2)-month, respectively. The average PCB dry deposition fluxes in spring, summer, fall and winter were 2.16, 1.99, 5.70 and 11.9 pg WHO-TEQ/m(2)-month during 2012, respectively. As for 2013, the average PCB dry deposition fluxes in spring, summer, fall and winter were 2.11, 1.27, 4.49 and 8.88 pg WHO-TEQ/m(2)-month, respectively. The minimum simulated value occurred in summer, while the maximum dry deposition fluxes, which were about 4-5 times higher than the minimum values, occurred in winter. The lower values observed in summer may be caused by the atmospheric diffusion of SVOCs and high rainfall intensity.
    關聯: Aerosol and Air Quality Research, v.14 n.7, pp.1950-1965
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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