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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/41561


    Title: Exposure to fine particulate matter (PM2.5) among highway toll station workers in Taipei : direct and indirect exposure assessment
    Authors: Lai, Ching-huang;Liou, Saou-hsing;Shih, Tung-sheng;Tsai, Perng-jy;Chen, Hsiao-lung;張玉坤;Chang, Yue-cune;Buckley, Timothy J.;Strickland, Paul;Jaakkola, Jouni J. K.
    Contributors: 淡江大學數學學系
    Keywords: exposure assessment;PM2.5;toll worker;traffic density;traffic exhaust
    Date: 2004-03-01
    Issue Date: 2010-01-28 07:49:30 (UTC+8)
    Publisher: Heldref Publications
    Abstract: In this study, the authors assessed occupational exposure to PM2.5 among 47 highway toll station workers in Taipei, Taiwan. The subjects were monitored for 10 days to assess integrated 8-hr fine particulate matter (PM2.5) breathing zone concentration. Researchers constructed a microenvironment-time-concentration matrix and applied direct and indirect approaches to assess cumulative exposure. Mean PM2.5 concentration for workers in the truck and bus lanes was 308 μg/m5 (SD = 115.5 μg/m3), substantially higher compared with cash-payment car lanes (mean 115, SD = 41.8, p < 0.001) and ticket-payment car lanes (mean 109, SD = 48.7, p < 0.001). Concentration per vehicle in the truck and bus lanes was 6.4 and 3.7 times higher, respectively, than that of ticket- or cash-payment car lanes. Mean cumulative exposure for the 10-day period was 4,900-13,407 μg/m3 · hr, with a mean of 8,019 μg/m3 · hr (SD = 2,375.3). Indirect and direct concentrations were strongly correlated (r2 = .61, F(1, 125); p = 0.000). The results of this study show that personal exposure to PM2.5 can be reliably estimated using indirect approaches.
    Relation: Archives of Environmental Health 59(3), pp.138-148
    DOI: 10.3200/AEOH.59.3.138-148
    Appears in Collections:[Graduate Institute & Department of Mathematics] Journal Article

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