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Title: Characteristics of organic matter in PM2.5 in Shanghai
Authors: Feng, Jialiang
Chan, Chak Keung
Fang, Ming
Keywords: Aerosol
Organic carbon
Water soluble organic carbon
Solvent extractable organic compound
Issue Date: Aug-2006
Citation: Chemosphere, vol. 64, iss. 8, August 2006, p. 1393-1400. (pre-published version)
Abstract: Solvent extractable organic compounds (SEOC), organic carbon, elemental carbon and water soluble organic carbon (WSOC) in PM2.5 samples collected in Shanghai, China in 2002 and 2003 were measured to determine the composition and sources of the organic matter in atmospheric aerosols. Distinct seasonal variations were detected with higher concentrations of organic matter in winter. The concentration of total carbon at ~20 μg m-3 in winter was about three times the summer value. About 30% of the total carbon was water soluble. Unresolved complex mixture (UCM) and fatty acids were the most abundant components quantified in SEOC, similar to other Chinese cities previously studied. High ratio of UCM to n-alkanes (U:R) and the composition of triterpanes indicated that engine exhaust was a major source of the airborne organic matter. Emissions from coal burning had more impact in the rural areas, based on the U:R value and PAHs composition. Chemical Mass Balance (CMB) modeling showed that about one half of the organic carbon was from engine exhaust and slightly over 20% was from coal burning. No clear spatial variation in the concentration of the organic matter was found between urban and rural areas. Our results showed that due to the rapid urbanization and relocation of industrial plants from urban areas to rural areas in the past 20 years, air pollution in rural areas is becoming a serious problem in Shanghai and the Yangtze River delta.
Rights: Chemosphere © 2006 Elsevier. The Journal's web site is located at
Appears in Collections:CBME Journal/Magazine Articles

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