Source Apportionment of Ambient Volatile Organic Compounds in Beijing

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• 作者：Yu Song ; Min Shao ; Ying Liu ; Sihua Lu ; William Kuster ; Paul Goldan ; Shaodong Xie
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：June 15, 2007
• 年：2007
• 卷：41
• 期：12
• 页码：4348 - 4353
• 全文大小：132K
• 年卷期：v.41,no.12(June 15, 2007)
• ISSN：1520-5851

文摘

The ambient air quality standard for ozone is frequentlyexceeded in Beijing in summer and autumn. Sourceapportionments of volatile organic compounds (VOCs),which are precursors of ground-level ozone formation, canbe helpful to the further study of tropospheric ozoneformation. In this study, ambient concentrations of VOCswere continuously measured with a time resolution of 30 minin August 2005 in Beijing. By using positive matrixfactorization (PMF), eight sources for the selected VOCspecies were extracted. Gasoline-related emissions (thecombination of gasoline exhaust and gas vapor),petrochemicals, and liquefied petroleum gas (LPG) contributed52, 20, and 11%, respectively, to total ambient VOCs.VOC emissions from natural gas (5%), painting (5%), dieselvehicles (3%), and biogenic emissions (2%) were alsoidentified. The gasoline-related, petrochemical, and biogenicsources were estimated to be the major contributors toozone formation potentials in Beijing.