Formation of ozone in the reaction of OH with O/sub 3//sup -/ and the decay of ozonide ion radical at pH 10-13
Ozone forms in aqueous alkaline solution, pH 10-13, by a reaction between OH and O/sub 3//sup -/ radicals. The reaction, OH + O/sub 3//sup -/ ..-->.. O/sub 3/ + OH/sup -/, is about 30% of the total reaction. A second reaction is OH + O/sub 3//sup -/ + OH/sup -/ ..-->.. 2O/sub 2//sup -/ + H/sub 2/O. The ozone formation is demonstrated by a high-pressure pulse radiolysis technique using a 4-..mu..s, 40-krd pulse. The ozone rapidly disappears in a reaction with the simultaneously formed O/sub 2//sup -/ re-forming O/sub 3//sup -/. The product resulting from the O/sub 3//sup -/ decay is the peroxy radical, O/sub 2//sup -/. The overall rate constant, k(OH + O/sub 3//sup -/), is (8.5 +/- 1.0) X 10/sup 9/ dm/sup 3/ mol/sup -1/ s/sup -1/. Computer simulations of the high-pressure system as well as of the atmospheric-pressure oxygenated system with high and low pulse intensity support a mechanism for the O/sub 3//sup -/ decay based on the above-mentioned reactions. The protonation rate constant of the O/sub 3//sup -/ radical ion, k(O/sub 3//sup -/ + H/sup +/), is (9.0 +/- 1.0) X 10/sup 10/ dm/sub 3/ mol/sup -1/ s/sup -1/. 6 figures, 2 tables.
- Research Organization:
- Riso National Lab., Roskilde, Denmark
- OSTI ID:
- 6922097
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:2; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ANIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COMPUTERIZED SIMULATION
DECAY
DECOMPOSITION
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXYL RADICALS
IONS
KINETICS
OXYGEN COMPOUNDS
OZONE
OZONIZATION
PEROXY RADICALS
PH VALUE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
SIMULATION
SYNTHESIS