Advanced oxidation processes. Test of a kinetic model for the oxidation of organic compounds with ozone and hydrogen peroxide in a semibatch reactor
Experimental data are presented to test a kinetic model of the OE/H{sub 2}O{sub 2} process in a semibatch reactor. The effect of bicarbonate and carbonate ions is measured and found to be in concurrence with model predictions. The effect of pH in the ozone mass-transfer-limited region was examined in bicarbonate-spiked distilled water. Since the reaction is mass transfer limited, the primary effect above pH 7 is the result of changes in the distribution of inorganic carbon species which are OH-radical scavengers. Below pH 7, there is a lag period during which ozone and peroxide increase until the chain reaction begins. The effects of chloride ion and the concentration of radical scavengers other than carbonate species in ground waters are also measured. The mass-transfer/reaction rate model has been used to estimate rate constants for the reaction of hydroxyl radicals with trichloroethylene, 1,2-dibromoethane, 1,2-dibromo-3-chloropropane, carbon tetrachloride, and two bicyclic alcohols, 2-methylisoborneol and geosmin. While the model developed for the distilled water system was successful in predicting the rate of tetrachloroethylene (PCE) oxidation and the concentration of residual ozone and peroxide in regions I and III, respectively, there are several features of the model that remain unresolved when the matrix is changed to a real surface or ground water. This and subsequent papers will investigate these effects.
- Research Organization:
- California Univ., Los Angeles, CA (United States)
- OSTI ID:
- 5607225
- Report Number(s):
- PB-91-183186/XAB
- Resource Relation:
- Other Information: Pub. in Industrial Engineering Chemistry Research, v28 n11 p1580-1587 1989. Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab., Los Angeles City Dept. of Water and Power, CA., and National Science Foundation, Washington, DC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROGEN PEROXIDE
CHEMICAL REACTION KINETICS
ORGANIC COMPOUNDS
OXIDATION
OZONE
WATER CHEMISTRY
MATHEMATICAL MODELS
FORECASTING
GROUND WATER
HYDROXYL RADICALS
MASS TRANSFER
PH VALUE
SURFACE WATERS
CHEMICAL REACTIONS
CHEMISTRY
HYDROGEN COMPOUNDS
KINETICS
OXYGEN COMPOUNDS
PEROXIDES
RADICALS
REACTION KINETICS
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)