Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Hybrid Receptor Model for Secondary Sulfate from an SO2 Point Source.
Author Lewis, C. W. ; Stevens, R. K. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1985
Report Number EPA/600/J-85/177;
Stock Number PB86-110707
Additional Subjects Air pollution ; Sulfates ; Sulfur dioxide ; Sources ; Sites ; Concentration(Composition) ; Chemical reactions ; Reaction kinetics ; Particles ; Oxidation ; Reprints ; Receptor models ; Tracer studies ; Acid rain ; Point sources ; Wet deposition
Library Call Number Additional Info Location Last
NTIS  PB86-110707 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 10p
A formalism is presented for calculating the ambient concentration of secondary sulfate at any downwind distance from an SO2-emitting point source. The SO2 is assumed to be affected by dispersion, dry deposition and homogeneous gas phase oxidation processes having arbitrary time dependencies. A receptor model estimate of the primary particle contribution at the downwind site is used to account for all of the dispersion and part of the deposition. An important finding is that the secondary sulfate is sensitive only to the average values of the deposition and oxidation rates, and not to their detailed time dependences. Extensions of the formalism to include wet deposition and nitrate formation are also discussed.