| Summary: | 碩士 === 弘光科技大學 === 環境工程研究所 === 99 === This study investigated the ambient air particle bound arsenic As(p) and mercury Hg(p) compositions and concentrations in dry deposition and total suspended particulates (TSP) in central Taiwan during years of 2009-2010.
Bei-shi (suburban/coastal), Chang-hua (downtown), He-mei (residential), Quan-xing (industrial) and Gao-mei (wetland) sampling sites were selected in this study. The main industries at Quan-xing industrial park were steel industry, electronic industry, plastic industry and chemical industry. And the wetland was surrounded by Taichung thermal power plant (TTPP) and fossil fuel combustion. The main suburban/coastal were science park and fossil fuel combustion. And the downtown and residential were transportation, waste incineration, and fossil fuel combustion. The highest average concentrations seasonal variation for Hg(p) in TSP and dry deposition were occurred in spring at five characteristic sampling sites. The possible reason is due to the influence of dust storm from mainland China. In addition, the highest average concentrations seasonal variation of As(p) in TSP and dry deposition were occurred in fall and winter. The possible reason is that low-wind conditions brought elevated concentrations of As(p) in fall and winter at these five sampling sites. Finally, straw burning activities were prevailing in the months of September-October and January- February. In other words, fall and winter are the possible seasons for the high compositions in TSP and dry deposition of Hg(p) and As(p).
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