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COMPARISON OF AEROSOL ACIDITY IN URBAN AND SEMI-RURAL ENVIRONMENTS
Citation:
Burton, R. COMPARISON OF AEROSOL ACIDITY IN URBAN AND SEMI-RURAL ENVIRONMENTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/278.
Description:
During the summer of 1990, acid aerosol, acid gas. and ammonia measurements were conducted simultaneously at three locations in central and western Pennsylvania where population levels were large (metropolitan Pittsburgh> and small (semi-rural communities of Uniontown and State College). erosol acidity was found to be lower in the urban area than in the two semi-rural locations. n the contrast, ammonia levels were higher in the urban environment than in the semi-rural environments. ossible sources of ammonia in Pittsburgh are people residing in the city or the two coke plants located upwind of the Pittsburgh sampling site. ixture of totally and partially neutralized sulfates, i.e., (NH4)2S04 and NH4HS04, were the dominating sulfur species in Pittsburgh while in State College and Uniontown, the primary sulfur species were H2S04, and NH4HS04.