Record Display for the EPA National Library Catalog

RECORD NUMBER: 5 OF 94

OLS Field Name OLS Field Data
Main Title Ambient Sulfate Aerosol Deposition in Man: Modeling the Influence of Hygroscopicity.
Author Martonen, T. B. ; Barnett, A. E. ; Miller, F. J. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. ;Northrop Services, Inc., Research Triangle Park, NC.
Year Published 1985
Report Number EPA/600/J-85/303;
Stock Number PB86-163383
Additional Subjects Sulfates ; Deposition ; Aerosols ; Humans ; Lung ; Moisture ; Modeling ; Reprints ; Air pollution effects(Humans) ; Hygroscopicity
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB86-163383 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 16p
Abstract
Atmospheric sulfate aerosols (H2SO4, (NH4)2SO4, and NH4HSO4) are of international concern because of their global prevalence and potential irritant or toxic effects on humans. To assess hazards following inhalation exposure, the total dose delivered to the human respiratory tract and its regional distribution must be determined. The mass median aerodynamic diameter of the inhaled aerosol will influence the sites of deposition in the respiratory tract. Atmospheric sulfate aerosols are hygroscopic and will have changing particle sizes and densities as they absorb water vapor in the humid environment of the human respiratory tract. Experimental and theoretical data that describe particle size as a function of temperature and relative humidity were used in computer subroutines of an aerosol deposition model in order to calculate the dose dispersion of H2SO4, (NH4)2SO4, and NH4HSO4 aerosols in man. Different temperature and relative humidity environments that approximately correspond to nasal and oral breathing were studied.