TY - JOUR
T1 - Characterization of nonpolar organic fine particulate matter in Houston, Texas
AU - Yue, Z. W.
AU - Fraser, M. P.
N1 - Funding Information:
Funding for this work was provided by the United States Environmental Protection Agency through the Fine Particulate Matter Super-site program. Although the research described in this article has been funded by the United States Environmental Protection Agency, it has not been subjected to the Agency’s required peer and policy review and therefore does not necessarily reflect the views of the Agency, and no official endorsement should be inferred.
PY - 2004/5
Y1 - 2004/5
N2 - Fine particle samples were collected in Houston, TX every second day during the summer of 2000 as part of the EPA-sponsored Houston Fine Particulate Matter Supersite program. Nonpolar compounds including n-alkanes, polycyclic aromatic hydrocarbons (PAH), and petroleum biomarkers were quantified to determine the molecular composition of the organic fraction of ambient fine particles. The results show that n-alkanes dominate other nonpolar compound classes, with Carbon Preference Index (CPI) values ranging from 1.47 to 1.94. Although plant wax alkanes contribute to ambient concentrations of fine particles, the presence of petroleum biomarkers suggests n-alkanes mainly come from anthropogenic sources, and specific species concentrations are used to separate sites by the degree to which motor vehicle and petroleum combustion emissions impact local air quality. Concentrations of PAH indicate that combustion sources in the industrial zone of Houston contribute to ambient fine particle concentrations. Additionally, data collected during a period of widespread haze episode attributed to agricultural burning and wildfires indicate that these sources can periodically dominate other sources of fine particles in the region.
AB - Fine particle samples were collected in Houston, TX every second day during the summer of 2000 as part of the EPA-sponsored Houston Fine Particulate Matter Supersite program. Nonpolar compounds including n-alkanes, polycyclic aromatic hydrocarbons (PAH), and petroleum biomarkers were quantified to determine the molecular composition of the organic fraction of ambient fine particles. The results show that n-alkanes dominate other nonpolar compound classes, with Carbon Preference Index (CPI) values ranging from 1.47 to 1.94. Although plant wax alkanes contribute to ambient concentrations of fine particles, the presence of petroleum biomarkers suggests n-alkanes mainly come from anthropogenic sources, and specific species concentrations are used to separate sites by the degree to which motor vehicle and petroleum combustion emissions impact local air quality. Concentrations of PAH indicate that combustion sources in the industrial zone of Houston contribute to ambient fine particle concentrations. Additionally, data collected during a period of widespread haze episode attributed to agricultural burning and wildfires indicate that these sources can periodically dominate other sources of fine particles in the region.
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U2 - 10.1080/02786820390229444
DO - 10.1080/02786820390229444
M3 - Article
AN - SCOPUS:2442522202
SN - 0278-6826
VL - 38
SP - 60
EP - 67
JO - Aerosol Science and Technology
JF - Aerosol Science and Technology
IS - SUPPL. 1
ER -