Concentration and chemical composition of PM2.5 in Shanghai for a 1-year period
2003; Elsevier BV; Volume: 37; Issue: 4 Linguagem: Inglês
10.1016/s1352-2310(02)00918-4
ISSN1873-2844
AutoresBoming Ye, Xueli Ji, Haizhen Yang, Xiaohong Yao, Chak K. Chan, Steven H. Cadle, Tai L. Chan, Patricia A. Mulawa,
Tópico(s)Vehicle emissions and performance
ResumoWeekly PM2.5 samples were collected in Shanghai, China at two sites, Tongji University and Hainan Road. Sampling started in March 1999 and was conducted for 1 year. The ambient mass concentration and chemical composition of the PM2.5 were determined. Chemical analyses included elemental composition, water-soluble ions, and organic and elemental carbon. Weekly PM2.5 mass concentrations ranged from 21 to 147 μg/m3, with annual average concentrations of 57.9 and 61.4 μg/m3 at the two sites, respectively. Seasonal variation of PM2.5 concentrations was significant, with the highest concentrations observed from mid-November through December and the lowest from June through September. Ammonium sulfate and nitrate accounted for 41.6% of the PM2.5 mass with sulfate alone accounting for 23.4% of the PM2.5 mass. Carbonaceous material accounted for 41.4% of the PM2.5 mass, with 73% of that mass being organic, as defined by the TOR analysis method. Crustal components averaged 9.6% of the PM2.5 mass. Potassium, which was 95% water soluble, accounted for 2.7% of the PM2.5 mass.
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