Study of Water-Soluble Ions in Ambient Air Suspended Particles in Taichung, Taiwan

Guor-Cheng Fang ； Cheng-Nan Chang ； Yuh-Shen Wu ； Peter Pi-Cheng Fu ； Chi-Dong Chen ； Shyh-Chyi Chang

《Aerosol and Air Quality Research》 2卷1期 (2002/06) Pp. 41-52

並列摘要

This experiment was conducted during November in 2000 and February in 2001 in Taichung, central Taiwan. The study used a TE-PUF sampler, Universal air sampler and MOUDI (Micro-Orifice Uniform Deposit Impactor) sampler to collect the ambient air suspended particles and analyzed their water-soluble ions (Cl(superscript 3-), N0(superscript 3-), SO4^(2-), Na(superscript +), NH(superscript 4+), K(superscript +), Mg(superscript 2+) and Ca(superscript 2+)). Analytical results indicate that the mean mass concentration for PM2.5, PM2.5-10 and TSP measured at the CCRT (traffic) sampling site are 54.5, 27.8 and 158 ug m^(-3), respectively. Additionally, the mean mass concentration for PM2.5, PM2.5-10 and TSP measured at the THUC sampling site are 23.6, 16.3 and 85.6 ug m^-3, respectively. Furthermore, the major water-soluble ions of PM2.5 measured in this sampling region are S0^(2-)4 and NH(superscript +)4, while those of PM2.5-10 are Clˉ, NOˉ3 and S0＾（2-）4, respectively. At the CCRT (traffic) sampling site, the mean size distributions of mass, S0＾（2-）4 and NH(superscript +)4 exhibit a bimodal distribution whereas those of Clˉ, NOˉ3, Na(superscript +), K(superscript +), Mg(superscript 2+) and Ca(superscript 2+) have a bimodal distribution. At the THUC (campus) sampling site, the mean size distributions of mass, Clˉ, NO(superscript 3-), SO^(2-)4 and Ca(superscript 2+) are bimodal whereas those of Na(superscript +), NH(superscript +)4, K(superscript +) and Mg(superscript 2+) have display a unimodal distribution.

並列關鍵字

Suspended particles ； Anion ； Cation ； Size distribution ； relationship