Particle size distribution and anion content at a traffic site in Sha-Lu, Taiwan

Kuan Foo Chang, Guor Cheng Fang*, Chung Sying Lu, Hsun-Ling Bai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Ambient air particle concentrations were sampled by two total suspended particle (TSP) samplers, PM 10 /PM 2.5 specific sampler and micro-orifice uniform deposit impactor (MOUDI) during July-October 2000 at a traffic sampling site in central Taiwan. The average TSP concentration (194 μg/m 3 ) was about a factor of two higher than that of the fraction <2.5 μm (93.2 μg/m 3 ). The mean level of the fraction <10 μm collected by MOUDI (93.2 μg/m 3 ) was about 11/2 times higher than that of the size class <2.5 μm (43.8 μg/m 3 ). Furthermore, this fraction showed a certain correlation with the TSP concentration. The particle size distribution was bimodal in the ambient air at the traffic site. The major peaks appear at particle diameters between 0.56-1.0 and 3.2-5.6 μm. The percentages of anions contained in TSP were 0.24% F-, 13.7% Cl - , 0.52% Br - , 12.0% NO 3 , 18.9% NO 2 - , and 54.6% SO 4 2- . The Cl - , NO 2- , and NO 3- size distributions were all unimodal and the major peaks appeared at 3.2-5.6 μm. The SO 4 2- size distribution was bimodal, with major peaks at 0.32-0.56 and 3.2-5.6.

Original languageEnglish
Pages (from-to)791-799
Number of pages9
JournalChemosphere
Volume45
Issue number6-7
DOIs
StatePublished - 20 Oct 2001

Keywords

  • Anion
  • Coarse particles
  • Fine particles
  • Size distribution

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