| Summary: | 碩士 === 弘光科技大學 === 環境工程研究所 === 96 === Particulate matter (PM) is a major factor which affects the air quality of ambient environment in Taiwan region. The consecutive study of ambient air pollutants for different particulate seizes and their chemical compositions were conducted. Several character sampling sites were selected in this study. They are Taichung Harbor (TH) and WuChi traffic (WT), Taichung airport (TA) and WuChi Industrual Parks (WI) sampling sites. The investigation results indicated that average total suspended particulates (TSP) concentrations were 120.6±30.68 µg/m3, and coarse particulate (PM with aerodynamic diameter 2.5-10 μm, PM2.5–10) concentrations were 24.45±7.83 µg/m3. Moreover, average fine particulate concentrations (PM with aerodynamic diameter <2.5 μm, PM2.5) were 38.13±8.44 µg/m3 during sampling period (September to December of 2005) at TA sampling site. Regarding atmospheric particulate concentrations at WT sampling site, the average TSP concentrations were 113.72±34.46 µg/m3, and coarse particulate concentrations were 25.99±8.18 µg/m3, respectively. Additionally, average fine particulate concentrations were 47.38±13.59 µg/m3 during March 2004 and January 2005 at WT sampling site. As for TH sampling site, average TSP concentrations were 152.76±28.37 µg/m3, and coarse particulate concentrations were 28.69±10.49 µg/m3. Moreover, average fine particulate concentrations were 56.38±18.53 µg/m3 from March 2004 to January 2005 at TH sampling site. Regarding WI sampling site, average concentrations for coarse and fine particulates were 26.7±14.46 µg/m3 and 40.12±21.36 µg/m3, respectively during November 2006 to October 2007 sampling period. Additionally, the investigation results also revealed that three primary components of metallic elements in atmospheric particulates were Fe, Mg and Zn at TA sampling site. Furthermore, metallic elements Fe and Zn were the primary components on TSP at the TH and WT sampling sites, and Fe and Mg were the predominant components on coarse and fine particulates at the TH, and WT sampling sites. However, Zn and Fe were the predominant components on fine particulates at the WT sampling site. Moreover, three primary components of metallic elements in coarse and fine particulates were Fe, Mg and Ca at WI sampling site. Thus, the major pollution sources for metallic elements in atmospheric particulates were traffic, sea salts. Then followed by crustal elements and other sources around there regions in central Taiwan. Thus, how to improve the traffic problems has become the most important issue in this area.
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