Record Display for the EPA National Library Catalog


Main Title Exposures to Acidic Aerosols.
Author Spengler, J. D. ; Keeler, G. J. ; Koutrakis, P. ; Ryan, P. B. ; Raizenne, M. ;
CORP Author Harvard School of Public Health, Boston, MA. ;Environmental Health Directorate, Ottawa (Ontario).;Health Effects Research Lab., Research Triangle Park, NC.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/452;
Stock Number PB91-109447
Additional Subjects Aerosols ; Air pollution ; Exposure ; Seasonal variations ; Respiratory system ; Children ; Ontario ; Urban areas ; Sulfuric acid ; Reprints ; Air pollution monitoring ; Hydrogen ions ; Kingston(Tennessee) ; St Louis(Missouri) ; Steubenville(Ohio) ; Portage(Wisconsin)
Library Call Number Additional Info Location Last
NTIS  PB91-109447 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 11p
Ambient monitoring of acid aerosols in four U.S. cities and in a rural region of southern Ontario clearly show distinct periods of strong acidity. Measurements made in Kingston, TN, and Steubenville, OH, resulted in 24-hr H(+) ion concentrations exceeding 100 nmole/cu m more than 10 times during summer months. Periods of elevated acidic aerosols occur less frequently in winter months. The H(+) determined during episodic conditions in southern Ontario indicates that respiratory tract deposition can exceed the effects level reported in clinical studies. Observed 12-hr (H+) concentrations exceeded 550 nmole/cu m (approximately 27 microgram/cu m H2SO4). The maximum estimated 1-hr concentration exceeded 1500 nmole/cu m for H(+) ions. At these concentrations, an active child might receive more than 2000 nmole of H(+) ion in 12 hr and in excess of 900 nmole during the hour when H2SO4 exceeded 50 microgram/cu m.