Composition of PM2.5 and PM10 Aerosols in the IMPROVE Network

Composition of PM2.5 and PM10 Aerosols in the IMPROVE Network

PM 2.5 and PM 10 particulate concentrations measured at 42 sites in the Interagency Monitoring of Protected Visual Environments(IMPROVE) network at Class I visibility areas throughout the United States over the 1993 seasonal year showed well-defined regional patterns. The PM 2.5 concentration had a...

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Bibliographic Details
Published in:Journal of the Air & Waste Management Association (1995) Vol. 47; no. 2; pp. 194 - 203
Main Authors: Eldred, Robert A., Cahill, Thomas A., Flocchini, Robert G.
Format: Journal Article Conference Proceeding
Language:English
Published: Pittsburgh, PA Taylor & Francis Group 01-02-1997
Air & Waste Management Association
Subjects:
Applied sciences
Atmospheric pollution
Exact sciences and technology
Pollutants physicochemistry study: properties, effects, reactions, transport and distribution
Pollution
United States
North America
America
Elementary analysis
Suspended particle
Seasonal variation
Content
Aerosols
Air pollution
Sampling
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Summary:PM 2.5 and PM 10 particulate concentrations measured at 42 sites in the Interagency Monitoring of Protected Visual Environments(IMPROVE) network at Class I visibility areas throughout the United States over the 1993 seasonal year showed well-defined regional patterns. The PM 2.5 concentration had a large gradient from West to East, averaging 3 μg/m3 in most of the West compared to 13 μg/m3 in the Appalachian region. Coarse particle concentration (2.5-10 μm) exhibited a small gradient from North to South, but no gradient from West to East. No change in PM 2.5 or PM 10 was observed from 1988 to 1993 for sites with complete records. The elemental concentration (H, Na-Pb) was determined from all PM 2.5 Teflon filters and from the PM 10 filters from four sites: an eastern and western urban site (Washington, D.C. and South Lake Tahoe) and the nearest Class I site (Shenandoah and Bliss). Soil was the largest component of the coarse particle concentration. Sulfur accounted for 3% of the coarse particle concentration in the western pair, and 16-24% in the eastern pair. The urban sites had more organic, elemental carbon, and nitrate in the PM 2.5 fraction than the associated Class I sites, and more soil and organics in the coarse particle fraction.
ISSN:1096-2247
2162-2906
DOI:10.1080/10473289.1997.10464422