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Main Title Reactions of dissolved pollutants with ozone in aqueous solutions {microform} :
Author Kuo, C. H.
CORP Author Mississippi State Univ., Mississippi State. Dept. of Chemical Engineering.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory,
Year Published 1984
Report Number EPA/600/3-84/072; EPA-R-805253
Stock Number PB84-211218
Subjects Ozone-depleting substances ; Pollution--Environmental aspects ; Offenses agains the environment
Additional Subjects Reaction kinetics ; Oxidation ; Hydrocarbons ; Ozonization ; Air pollution ; Dissolved gases ; pH ; Olefin resins ; Solutions ; Spectrophotometry ; Mass spectroscopy ; Concentration(Composition) ; Temperature ; Gas chromatography ; Rain ; Precipitation(Meteorology) ; Aromatic compounds ; Chemical reaction ; Liquid phases ; Aerosols ; Gas analysis ; Acid rain ; Chemical reaction mechanisms ; Benzene
Library Call Number Additional Info Location Last
NTIS  PB84-211218 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 62 p. ; 28 cm.
This research was undertaken to investigate kinetics of liquid phase oxidation of selected hydrocarbons by ozone. Rate constants and orders of the ozonation reactions in aqueous solutions of pH values varying from 3 to 7 at 5 to 35C were determined utilizing the stopped-flow technique. Ozonation reactions of olefinic compounds including cyclohexene, cyclopentene and 1-pentene were much faster in aqueous solutions than in the vapor phase. The rate constants of the bimolecular reactions are of the order of 1,000,000l/mole sec or larger, and are nearly independent of the pH value and temperature. Experimental results indicate that saturated hydrocarbons such as cyclohexane, cylopentane, hexane and pentane were not reactive with dissolved ozone in solutions. Benzene and toluene reacted with ozone at moderate rates in acidic solutions but the ozonation of benzene was very rapid in neutral solutions yielding a first order rate constant of 12.2/sec at 25C. Orders of the ozonation of aromatic compounds changed with acidity indicating a possible shift in mechanisms of the reactions. Preliminary tests by the methods of chromatography showed that acids and aldehydes were formed in ozonation of the olefins and that oxidation of benzene produced benzoquinone and hydroquinone. Polymerization of the hydrocarbons might be indicated by detections of high molecular species in the solutions.
Caption title. "June 1984." "EPA/600/3-84/072." Microform.