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Source Apportionment of PM_(2.5) in the Southeastern United States Using Solvent-Extractable Organic Compounds as Tracers

Zheng, Mei and Cass, Glen R. and Schauer, James J. and Edgerton, Eric S. (2002) Source Apportionment of PM_(2.5) in the Southeastern United States Using Solvent-Extractable Organic Compounds as Tracers. Environmental Science and Technology, 36 (11). pp. 2361-2371. ISSN 0013-936X. doi:10.1021/es011275x. https://resolver.caltech.edu/CaltechAUTHORS:20160607-125105439

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Abstract

A chemical mass balance (CMB) receptor model using particle-phase organic compounds as tracers is applied to apportion the primary source contributions to fine particulate matter and fine particulate organic carbon concentrations in the southeastern United States to determine the seasonal variability of these concentrations. Source contributions to particles with aerodynamic diameter ≤2.5 μm (PM2.5) collected from four urban and four rural/suburban sites in AL, FL, GA, and MS during April, July, and October 1999 and January 2000 are calculated and presented. Organic compounds in monthly composite samples at each site are identified and quantified by gas chromatography/mass spectrometry and are used as molecular markers in the CMB model. The major contributors to identified PM2.5 organic carbon concentrations at these sites in the southeastern United States include wood combustion (25−66%), diesel exhaust (14−30%), meat cooking (5−12%), and gasoline-powered motor vehicle exhaust (0−10%), as well as smaller but statistically significant contributions from natural gas combustion, paved road dust, and vegetative detritus. The primary sources determined in the present study when added to secondary aerosol formation account for on average 89% of PM2.5 mass concentrations, with the major contributors to PM2.5 mass as secondary sulfate (30 ± 6%), wood combustion (15 ± 12%), diesel exhaust (16 ± 7%), secondary ammonium (8 ± 2%), secondary nitrate (4 ± 3%), meat cooking (3 ± 2%), gasoline-powered motor vehicle exhaust (2 ± 2%), and road dust (2 ± 2%). Distinct seasonality is observed in source contributions, including higher contributions from wood combustion during the colder months of October and January. In addition, higher percentages of unexplained fine organic carbon concentrations are observed in July, which are likely due to an increase in secondary organic aerosol formation during the summer season.


Item Type:Article
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http://dx.doi.org/10.1021/es011275xDOIArticle
http://pubs.acs.org/doi/abs/10.1021/es011275xPublisherArticle
Alternate Title:Source Apportionment of PM2.5 in the Southeastern United States Using Solvent-Extractable Organic Compounds as Tracers
Additional Information:© 2002 American Chemical Society. Received for review September 10, 2001. Revised manuscript received March 4, 2002. Accepted March 6, 2002. We thank Dr. Jon B. Manchester and Mark Mieritz of the Wisconsin State Hygiene laboratory for assistance with the GC/MS analysis. The EC, OC, PM2.5 mass, inorganic speciation, and ionic data are kindly provided by the SEARCH study. We thank Paul Mayo for preparing the composite filter samples. This research was supported by Electric Power Research Institute, Inc. (EPRI) under Agreement #EP-P4655/C2272.
Funders:
Funding AgencyGrant Number
Electric Power Research Institute (EPRI)EP-P4655/C2272
Issue or Number:11
DOI:10.1021/es011275x
Record Number:CaltechAUTHORS:20160607-125105439
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160607-125105439
Official Citation:Source Apportionment of PM2.5 in the Southeastern United States Using Solvent-Extractable Organic Compounds as Tracers Mei Zheng, Glen R. Cass, James J. Schauer, and Eric S. Edgerton Environmental Science & Technology 2002 36 (11), 2361-2371 DOI: 10.1021/es011275x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67738
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:08 Jun 2016 14:30
Last Modified:11 Nov 2021 03:53

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