Record Display for the EPA National Library Catalog


Main Title Sources and transport of trace metals in urban aerosols /
Author Winchester, John W. ; Nelson, J. William
Other Authors
Author Title of a Work
Nelson, J. William.
CORP Author Florida State Univ., Tallahassee. Dept. of Oceanography.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA/600/3-79/019; EPA-R-802132
Stock Number PB-294 838
Subjects Aerosols--Environmental aspects
Additional Subjects Gas analysis ; Trace elements ; Metals ; Particle size distribution ; Chemical analysis ; Sampling ; Transport properties ; Aerosols ; Sources ; Urban areas ; Titanium ; Lead(Metal) ; Laboratory equipment ; Public health ; Respiratory system ; Missouri ; Air pollution detection ; Saint Louis(Missouri) ; Air pollution effects(Humans) ; Indoor air pollution ; Regional Air Pollution Study
Library Call Number Additional Info Location Last
NTIS  PB-294 838 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 71 pages : illustrations ; 28 cm.
A methodology was developed, tested, and applied to the identification of trace element aerosol sources and trace element aerosol transport phenomena. The method uses light weight and portable field sampling equipment, and results in the acquisition of large data sets suitable for statistical analysis and the testing of aerosol transport models. Aerosol sampling in the ambient atmosphere was accomplished through a combination of time-sequenced filter collections with hourly resolution, and fractionated aerosol collections with 0.25 micrometer resolution. Elemental analysis was performed with particle induced X-ray emission, a sensitive and rapid method. Aerosol characterization studies were focussed on St. Louis, Missouri, during the Regional Air Pollution Study. Trace element pollutants were distinguished from their natural components on the basis of particle size distributions. Statistical analysis of time-sequenced concentration measurements revealed four distinct pollution sources for lead. A related analysis demonstrated that meteorological factors controlling the transport of titanium aerosol across the city could be identified. Extensions of the meteorology were applied to (1) the determination of trace element pollution deposition in the human respiratory tract through direct sampling of exhaled breath, (2) indoor environments, and (3) nonurban continental and marine atmospheres.