Characteristics and receptor modeling of 1 atmospheric PM2.5 at urban and rural sites in Pingtung, Taiwan

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Characteristics and receptor modeling of 1 atmospheric PM2.5 at urban and rural sites in Pingtung, Taiwan
出版類型SCI(Sciences Citation Index)
出版年度2008
AuthorsWen-Cheng Wang, 王文正, Kang-Shing Chen 陳康興, Shui-Jen Chen 陳瑞仁, Lin Chih-Chung 林志忠, Tsai Jen-Hsiung 蔡仁雄, C. H. Lai 賴嘉祥, & S. K. Wang 王信凱
開始頁112
頁數17
出版日期2008 / 6
其他編號0000
中文摘要

Suspended particles of PM2.5 in air were sampled concurrently at an urban site and a rural site in Pingtung County in southern Taiwan, in the spring, the summer and the fall of 2005. All samples were analyzed to identify eight water-soluble ions, carbonaceous contents, and 19 metal elements. Measurements reveal that the overall means of PM10 (and PM2.5) are 59.2 (47.4) μg/m3 at Pingtung (urban) site, and 63.6 (45.7) μg/m3 at Chao-Chou (rural) site. Although both sites exhibited strong correlations (R = 0.98 at Pingtung, and R = 0.78 at Chao-Chou) between PM10 and PM2.5 masses, the mean PM2.5/PM10 ratio was 0.81 at Pingtung, higher than 0.68 at Chao-Chou, suggesting that relatively large bare lands and outdoor burning on farms may have caused more coarse particles to be present in PM2.5 at a rural site (Chao-Chou) than at an urban site (Pingtung). Results of CMB (chemical mass balance) modeling show that the main contributors to PM2.5 mass at Pingtung are vehicle exhaust (49.3–62.4%) and secondary aerosols (SO42–, NO3– and NH4+) (31.2–37.8%), while those at Chao-Chou are the outdoor burning (25.3–50.4%) of agricultural waste, secondary aerosols (27.2–34.3%) and vehicle exhaust (12.0–26.9%), depending on the seasons.

期刊名稱Aerosol and Air Quality Research
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