Document Detail


Characteristics of organic matter in PM2.5 in Shanghai.
MedLine Citation:
PMID:  16442145     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Solvent extractable organic compounds (SEOC), organic carbon, elemental carbon and water soluble organic carbon (WSOC) in PM(2.5) 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 of about 20 microg 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, according to the U:R value and PAHs composition. Chemical mass balance (CMB) modeling shows that about half of the organic carbon was from engine exhaust and about 15% 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.
Authors:
Jialiang Feng; Chak K Chan; Ming Fang; Min Hu; Lingyan He; Xiaoyan Tang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-01-25
Journal Detail:
Title:  Chemosphere     Volume:  64     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-07-24     Completed Date:  2006-10-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  1393-400     Citation Subset:  IM    
Affiliation:
Department of Chemical Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
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MeSH Terms
Descriptor/Qualifier:
Aerosols
Air Pollutants / analysis*
China
Environmental Monitoring*
Organic Chemicals / analysis*
Particle Size
Seasons
Chemical
Reg. No./Substance:
0/Aerosols; 0/Air Pollutants; 0/Organic Chemicals

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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