Environmental Science & Technology · 2007 · 347 citations · 21 references
Natural SciencesChemistryEnvironmental SciencesAir PollutionAtmospheric ChemistryAtmospheric ScienceAir Pollutant SourcesAir PollutantsAir Pollution SourcesAir QualityAmbient Air QualityVolatile Organic CompoundsAmbient Volatile Organic CompoundsBiogenic EmissionsPollutant Source ApportionmentVehicle-related Voc EmissionsVoc Emission SourcesVolatile Organic Compound EmissionsVolatile Organic Compound SourcesVolatile Organic Compounds Emissions
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.
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Recent developments in receptor modeling
Philip K. Hopke · Journal of Chemometrics · 2003 · 334 citations