| Title: | Source apportionment of ambient volatile organic compounds in Beijing |
| Author(s): | Song Y; Shao M; Liu Y; Lu S; Kuster W; Goldan P; Xie S; |
| Address: | "Department of Environmental Sciences, Peking University, Beijing 100871, China" |
| ISSN/ISBN: | 0013-936X (Print) 0013-936X (Linking) |
| Abstract: | "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" |
| Keywords: | "Air Pollutants/*analysis China Chromatography, Gas *Environmental Monitoring Flame Ionization Mass Spectrometry Ozone/chemistry Vehicle Emissions/analysis Volatilization;" |
| Notes: | "MedlineSong, Yu Shao, Min Liu, Ying Lu, Sihua Kuster, William Goldan, Paul Xie, Shaodong eng Research Support, Non-U.S. Gov't 2007/07/14 Environ Sci Technol. 2007 Jun 15; 41(12):4348-53. doi: 10.1021/es0625982" |
