Source Apportionment of Ambient Volatile Organic Compounds in Beijing

The ambient air quality standard for ozone is frequently exceeded in Beijing in summer and autumn. Source apportionments of volatile organic compounds (VOCs), which are precursors of ground-level ozone formation, can be helpful to the further study of tropospheric ozone formation. In this study, amb...

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Bibliographic Details
Published in:Environmental science & technology 2007-06, Vol.41 (12), p.4348-4353
Main Authors: Song, Yu, Shao, Min, Liu, Ying, Lu, Sihua, Kuster, William, Goldan, Paul, Xie, Shaodong
Format: Article
Language:English
Subjects:
Air Pollutants - analysis
Applied sciences
Atmospheric pollution
China
Chromatography, Gas
Emission standards
Emissions
Environmental Monitoring
Exact sciences and technology
Flame Ionization
Gasoline
Mass Spectrometry
Outdoor air quality
Ozone
Ozone - chemistry
Petrochemicals
Pollution
Vehicle Emissions - analysis
VOCs
Volatile organic compounds
Volatilization
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Summary:The ambient air quality standard for ozone is frequently exceeded in Beijing in summer and autumn. Source apportionments of volatile organic compounds (VOCs), which are precursors of ground-level ozone formation, can be helpful to the further study of tropospheric ozone formation. In this study, ambient concentrations of VOCs were continuously measured with a time resolution of 30 min in August 2005 in Beijing. By using positive matrix factorization (PMF), eight sources for the selected VOC species were extracted. Gasoline-related emissions (the combination of gasoline exhaust and gas vapor), petrochemicals, and liquefied petroleum gas (LPG) contributed 52, 20, and 11%, respectively, to total ambient VOCs. VOC emissions from natural gas (5%), painting (5%), diesel vehicles (3%), and biogenic emissions (2%) were also identified. The gasoline-related, petrochemical, and biogenic sources were estimated to be the major contributors to ozone formation potentials in Beijing.
ISSN:0013-936X
1520-5851
DOI:10.1021/es0625982