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  • Title: Concentration and chemical characteristics of PM2.5 in Beijing, China: 2001-2002.
    Author: Duan FK, He KB, Ma YL, Yang FM, Yu XC, Cadle SH, Chan T, Mulawa PA.
    Journal: Sci Total Environ; 2006 Feb 15; 355(1-3):264-75. PubMed ID: 16185747.
    Abstract:
    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 microg m(-3) and 106.9 microg m(-3) at CGZ and HU site, respectively. More than 80% of the PM2.5 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. SO4(2-), NO3- and NH4+ were three major ions, accounting for 37%, 23% and 20%, respectively, of the total mass of inorganic water-soluble ions.
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