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Huan Jing Ke Xue

Title:		[Estimate of the formation potential of secondary organic aerosol in Beijing summertime]
Author(s):		Lu ZF; Hao JM; Duan JC; Li JH;
Address:		"Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. lvzifeng@tsinghua.org.cn"
Journal Title:		Huan Jing Ke Xue
Year:		2009
Volume:		30
Issue:		4
Page Number:		969 - 975
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"Fractional aerosol coefficients (FAC) are used in conjunction with measurements of volatile organic compounds (VOC) during ozone episodes to estimate the formation potential of secondary organic aerosols (SOA) in the summertime of Beijing. The estimation is based on the actual atmospheric conditions of Beijing, and benzene and isoprene are considered as the precursors of SOA. The results show that 31 out of 70 measured VOC species are SOA precursors, and the total potential SOA formation is predicted to be 8.48 microg/m3, which accounts for 30% of fine organic particle matter. Toluene, xylene, pinene, ethylbenzene and n-undecane are the 5 largest contributors to SOA production and account for 20%, 22%, 14%, 9% and 4% of total SOA production, respectively. The anthropogenic aromatic compounds, which yield 76% of the calculated SOA, are the major source of SOA. The biogenic alkenes, alkanes and carbonyls produce 16%, 7% and 1% of SOA formation, respectively. The major components of produced SOA are expected to be aromatic compounds, aliphatic acids, carbonyls and aliphatic nitrates, which contribute to 72%, 14%, 11% and 3% of SOA mass, respectively. The SOA precursors have relatively low atmospheric concentrations and low ozone formation potential. Hence, SOA formation potential of VOC species, in addition to their atmospheric concentrations and ozone formation potential, should be considered in policy making process of VOCs control"
Keywords:		Aerosols/*analysis Air Pollutants/*analysis Carbon/analysis China Cities *Environmental Monitoring Hydrocarbons/analysis Organic Chemicals/*analysis Ozone/*analysis/chemistry Particle Size Seasons;
Notes:		"MedlineLu, Zi-Feng Hao, Ji-Ming Duan, Jing-Chun Li, Jun-Hua chi Research Support, Non-U.S. Gov't China 2009/06/24 Huan Jing Ke Xue. 2009 Apr 15; 30(4):969-75"