Record Display for the EPA National Library Catalog
RECORD NUMBER: 14 OF 60Main Title | Effects of Activated Charcoal Filtration and Ozonation on Hydrocarbon and Carbonyl Levels of Ambient Air Used in Controlled-Exposure Chamber Studies of Air Pollutant Human Health Effects. | |||||||||||
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Author | Tilton, B. E. ; Bufalini, J. J. ; Meeks, S. A. ; Gay, B. W. ; | |||||||||||
CORP Author | Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. | |||||||||||
Publisher | 1994 | |||||||||||
Year Published | 1994 | |||||||||||
Report Number | EPA/600/A-94/166; | |||||||||||
Stock Number | PB94-210523 | |||||||||||
Additional Subjects | Air pollution effects(Humans) ; Test chambers ; Activated carbon treatment ; Ozonization ; Carbonyl compounds ; Hydrocarbons ; Ozone ; Air pollution sampling ; Health risks ; Respiratory diseases ; Silica gel ; VOCs(Volatile organic compounds) | |||||||||||
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Collation | 8p | |||||||||||
Abstract | Air sampling experiments were done in 1985, 1987, and 1993 at the human-exposure chamber facility of the U.S. EPA Health Effects Research Laboratory in Chapel Hill, NC. Measurements of volatile organic compounds (VOCs) by GC-FID and aldehyde measurements by the DNPH silica gel cartridge method were made, comparing levels at the outside air intake to levels in the human controlled-exposure chamber. Ambient air passed through activated-charcoal filters can contain varying residual amounts of water vapor and gaseous pollutants such as hydrocarbons, oxygenates, and other organic and inorganic species. When the charcoal-filtered air stream is exposed to high-intensity radiation to generate ozone for use in human controlled-exposure experiments, there may be formation of compounds other than ozone. Results of measurements of some compounds of interest are discussed. |