Record Display for the EPA National Library Catalog


Main Title Mechanism of photochemically initiated oxidations /
Author Calvert, Jack G.
CORP Author Ohio State Univ., Columbus. Dept. of Chemistry.;Environmental Sciences Research Lab., Research Triangle Park, N.C.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory ; for sale by the National Technical Information Service,
Year Published 1976
Report Number EPA 600/3-76/070; EPA-R-800398
Stock Number PB-256 397
OCLC Number 37861535
Subjects Photochemistry. ; Atmospheric chemistry. ; Air--Pollution--Experiments.
Additional Subjects Hydrocarbons ; Sulfur dioxide ; Air pollution ; Nitrogen oxides ; Carbon monoxide ; Aldehydes ; Photochemical reactions ; Smog ; Molecular energy levels ; Reaction kinetics ; Photolysis ; Excitation ; Air pollution ; Alkanes ; Ozone ; Troposphere ; Computerized simulation ; Concentration(Composition) ; Lower atmosphere ; Aerosols ; Chemical reactions ; Chemical reaction mechanisms
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-3-76-070 Headquarters Library/Washington,DC 09/12/2011
EJBD  EPA 600-3-76-070 c.1 Headquarters Library/Washington,DC 03/18/2014
EKBD  EPA-600/3-76-070 Research Triangle Park Library/RTP, NC 07/11/2003
ESAD  EPA 600-3-76-070 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-256 397 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiv, 186p. : ill. ; 28 cm.
Several significant new observations have been made relative to chemical reactions that occur in sunlight-irradiated NOx/hydrocarbon/aldehyde/CO/SO2 polluted atmospheres. Many of the primary reactions that are needed to quantitatively evaluate the photo-oxidation mechanisms of SO2 in the atmosphere were measured. Rate constants for the reactions of the excited SO2(triplet B1) state of SO2 with various atmospheric gases, alkanes, alkenes, NO, CO, etc., were determined. In view of these results, the rate of SO2 photooxidation in the atmosphere is estimated, and the possible role of excited- SO2/alkene interactions that generate aerosols is evaluated. Rate constants for the homogeneous reaction of SO2 with O3, NO3, and N2O5 were also estimated. All of these reactions are relatively slow for conditions that usually exist in polluted atmospheres. The unusual reaction of SO3 with NO2 was observed, although its importance in the atmosphere cannot be evaluated accurately from the existing data. An evaluation was made of the photochemical smog mechanisms using a computer to simulate the rates of change in various polluted atmospheres. Several important features of special interest in developing control strategies were observed.
Grant No. R800398. "EPA-600/3-76-070". EPA Project Officer: Joseph J. Bufalini. References: pp. 169-182.