期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 355, 期 1-3, 页码 264-275出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2005.03.001
关键词
PM2.5; water-soluble ions; Carbonaceous species; crustal matter; PM2.5 mass balance
Weekly PM2.5 samples were simultaneously collected at a semi-residential (Tsinghua University) and a downtown (Chegongzhuang) site in Beijing from August 2001 through September 2002. The ambient mass concentration and chemical composition Of PM2.5 were determined. Analyses including elemental composition, water-soluble ions, and organic and elemental carbon were performed. The annual average concentrations of PM2.5 were 96.5 mu g m(-3) and 106.9 mu g m(-3) at CGZ and HU site, respectively. More than 80% of the PM(2.)5 mass concentrations were explained by carbonaceous species, secondary particles, crustal matters and trace elements at the two sites. Carbonaceous species were the most abundant components, constituting about 45% and 48% of the total PM2.5 mass concentrations at CGZ and THU site, respectively. SO42-, NO3- and NH4+ were three major ions, accounting for 37%, 23% and 20%, respectively, of the total mass of inorganic water-soluble ions. (c) 2005 Published by Elsevier B.V.
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