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

Category: Articles

Volume: 2 | Issue: 1 | Pages: 41-52
DOI: 10.4209/aaqr.2002.06.0005
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Guor-Cheng Fang 1, Cheng-Nan Chang2, Yuh-Shen Wu1, Peter Pi-Cheng Fu3, Chi-Dong Chen2, Shyh-Chyi Chang2

  • 1 Air Toxic and Environmental Analysis Laboratory, Hungkuang Institute of Technology, Sha-Lu, Taichung 433, Taiwan, R.O.C.
  • 2 Department of Environmental Science, Tunghai University, Taichung 407, Taiwan, R.O.C.
  • 3 Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, Arkansas 72079, U.S.A.

Abstract

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-, NO3-, SO42-, Na+, NH4+, K+, Mg2+ and Ca2+). 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 μm/m3, 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 μm/m3, respectively. Furthermore, the major water-soluble ion of PM2.5 measured in this sampling region are SO42- and NH4+, while those of PM2.5-10 are Cl-, NO3- and SO42-, respectively. At the CCRT (traffic) sampling site, the mean size distributions of mass, SO42- and NH4+ exhibit a bimodal distribution whereas those of Cl-, NO3-, Na+, K+, Mg2+ and Ca2+ have a bimodal distribution. At the THUC (campus) sampling site, the mean size distributions of mass, Cl-, NO3-, SO42- and Ca2+ are bimodal whereas those of Na+, NH4+, K+ and Mg2+ have display a unimodal distribution.

Keywords

Suspended particles Anion Cation Size distribution Relationship


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