Record Display for the EPA National Library Catalog


Main Title Origins of Aerosol Sulfur Size Distributions in the Los Angeles Basin.
Author Hering, S. V. ; Friedlander, S. K. ;
CORP Author California Univ., Los Angeles.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-R-806404; EPA-600/J-82-338;
Stock Number PB83-231233
Additional Subjects Particle size distributions ; Fines ; Sulfur ; Air pollution ; Los Angeles Basin ; Aerosols ; Growth curves ; Humidity ; Coagulation ; Fog ;
Library Call Number Additional Info Location Last
NTIS  PB83-231233 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
Low pressure impactor measurements show two distinct types of fine particle sulfur size distributions in Los Angeles. These types have mass median diameters of 0.54 + or - 0.07 micrometers and 0.20 + or - 0.02 micrometers, respectively. Factors which may account for the two distribution types including effects of relative humidity, coagulation, fogs and formation mechanisms are discussed. Calculations show that the 0.5 micrometers particles are consistent with chemical reactions in the aerosol phase, whereas the smaller particles result from gas phase SO2 oxidation. While the growth of the total aerosol volume distribution is not too sensitive to the mechanism, the chemical species distribution strongly depends on the growth law and can be used to establish its form. (Copyright (c) 1982 Pergamon Press Ltd.)