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Long-Term Efficiencies of Dust Suppressants to Reduce PM 10 Emissions from Unpaved Roads.

Authors :
Gillies JA
Watson JG
Rogers CF
DuBois D
Chow JC
Langston R
Sweet J
Source :
Journal of the Air & Waste Management Association (1995) [J Air Waste Manag Assoc] 1999 Jan; Vol. 49 (1), pp. 3-16.
Publication Year :
1999

Abstract

A 14-month study was undertaken to assess the long-term efficiencies of four dust suppressants (i.e., biocatalyst stabilizer, polymer emulsion, petroleum emulsion with polymer, and nonhazardous crude-oil-containing materials) to reduce the emission of PM <subscript>10</subscript> from public unpaved roads. PM <subscript>10</subscript> emission rates were calculated for each test section and for an untreated section for comparison purposes. Emission rates were determined from PM <subscript>10</subscript> concentrations measured from 1.25 m to 9 m upwind and downwind of the road and above its surface. Calculated emission factors ranged between zero and 1,361 g-PM <subscript>10</subscript> /vehicle kilometer traveled (VKT) (average uncertainty = ±35 g-PM <subscript>10</subscript> / VKT) for the four types applied. One week after application, suppressant efficiencies ranged between 33% and 100% for the four types applied. After 8-12 months of exposure to weathering and 4,900-6,400 vehicle passes, the suppressant efficiencies ranged from zero to 95%. Roadway surface properties associated with low-emitting, well-suppressed surfaces are (1) surface silt loading and (2) strength and flexibility of suppressant material as a surface layer or cover. Suppressants that create surface conditions resistant to brittle failure are less prone to deterioration and more likely to increase long-term reduction efficiency for PM <subscript>10</subscript> emissions on unpaved roads.

Details

Language :
English
ISSN :
2162-2906
Volume :
49
Issue :
1
Database :
MEDLINE
Journal :
Journal of the Air & Waste Management Association (1995)
Publication Type :
Academic Journal
Accession number :
28060609
Full Text :
https://doi.org/10.1080/10473289.1999.10463779