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Main Title Dosimetry Model for Hygroscopic Sulfate Aerosols in Selected Temperature and Relative Humidity Patterns.
Author Martonen, T. B. ; Miller, F. J. ;
CORP Author Northrop Services, Inc., Research Triangle Park, NC.;Health Effects Research Lab., Research Triangle Park, NC.
Year Published 1984
Report Number EPA-68-02-4032; EPA-600/D-84-046;
Stock Number PB84-151158
Additional Subjects Sulfates ; Aerosols ; Dosimetry ; Mathematical models ; Public health ; Particle size ; Humidity ; Temperature ; Toxicology ; Sulfuric acid ; Ammonium sulfate ; Hygroscopicity ; Density(Mass/Volume) ; Air pollution effects(Humans) ; Diammonium sulfate
Library Call Number Additional Info Location Last
NTIS  PB84-151158 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18p
Abstract Sulfate aerosols (NH4HSO4,(NH4)2SO4 and H2SO4) are of international health effects concern because of their global prevalence and potential irritant or toxic effects on human health. To assess hazards following inhalation exposure, the total dose delivered to the human respiratory tract and its regional distribution must be determined. It is known that such information can be expressed as a function of the mass median aerodynamic diameter (MMAD) of an inhaled aerosol. Sulfate aerosols are hygroscopic and will have changing particle sizes and densities upon absorption of H2O vapor in the humid environment of the human respiratory tract. The authors have developed a new mathematical description of inhaled particle behavior suitable for dosimetry of the human nasopharyngeal and oropharyngeal compartments, larynx, and tracheo-bronchial (TB) airways. Results show that the hygroscopic characteristics of ambient sulfate aerosols can greatly affect total dose deposited and the relative distribution of particle mass among airways.
PUB Date Free Form Jan 84
Category Codes 6E; 6T; 68G; 68A; 57U; 57Y
NTIS Prices PC A02/MF A01
Primary Description 600/11
Document Type NT
Cataloging Source NTIS/MT
Control Number 411840815
Origin NTIS
Type CAT