Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Source Apportionment of Phoenix PM2.5 Aerosol With the Unmix Receptor Model

spacer
spacer
Abstract: The multivariate receptor model Unmix has been used to analyze a 3-yr PM2.5 ambient aerosol data set collected in Phoenix, AZ, beginning in 1995. The analysis generated source profiles and overall percentage source contribution estimates (SCE) for five source categories: gasoline engines (33 plus/minus 4%), diesel engines (16 plus/minus 2%), secondary SO42- (19 plus/minus 2%), crustal/soil (22 plus/minus 2%), and vegetative burning (10 plus/minus 2%). The Unmix analysis was supplemented with scanning electron microscopy of a limited number of filter samples for information on possible additional low-strength sources. Except for the diesel engine source category, the Unmix SCEs were generally consistent with an earlier multivariate receptor analysis of essentially the same data using the Positive Matrix Factorization model. This article provides the first demonstration for an urban area of the capability of the Unmix receptor model.

The United States Environmental Protection Agency through its Office of Research and Development funded and managed the research described here. It has been subjected to Agency review and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
spacer
Citation:Lewis, C. W., G. A. Norris, T. L. Conner, and R. C. Henry. Source Apportionment of Phoenix PM2.5 Aerosol With the Unmix Receptor Model. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION 53(3):325-338, (2003).
spacer
spacer
Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
spacer
Division: Human Exposure & Atmospheric Sciences Division
spacer
Branch: Environmental Characterization & Apportionment Branch
spacer
Product Type: Journal
spacer
Published: 03/01/2003
spacer
Downloads:
spacer
Bullet Item Source Apportionment of Phoenix PM2.5 Aerosol With the Unmix Receptor Model
spacer
spacer
Related Entries:
spacer
Bullet Item Particulate Matter Elemental Composition By X-Ray Fluorescence Analysis
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov