Record Display for the EPA National Library Catalog

RECORD NUMBER: 14 OF 31

OLS Field Name OLS Field Data
Main Title Growth Laws for the Formation of Secondary Ambient Aerosols: Implications for Chemical Conversion Mechanisms.
Author McMurry, P. H. ; Wilson, J. C. ;
CORP Author Minnesota Univ., Minneapolis. Particle Technology Lab.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-R-803851; EPA-600/J-82-083;
Stock Number PB82-167172
Additional Subjects Particle size distribution ; Air pollution ; Gases ; Particles ; Test chambers ; Field tests ; Laboratory equipment ; Reprints ; Chemical reaction mechanisms ; Heterogeneous reactions
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB82-167172 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 16p
Abstract
The evolution of aerosol size distributions growing by gas-to-particle conversion has been observed recently in field and laboratory studies. A technique for extracting particle diameter growth rates from such data is presented. The functional dependence of these growth rates on particle diameter (i.e. the growth law) is then examined to infer clues about possible chemical mechanisms of gas-to-particle conversion. The data are consistent with the conclusion that droplet phase (heterogeneous) reactions were important in the Great Smoky Mountains where relative humidities were high (r.h. greater than 75%), while gas phase reactions were the predominant mechanism in smog chamber experiments (r.h. about 35%).