Investigation of the radiation stimulated oxidation of sulfite by molecular oxygen in aqueous solutions

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · High Energy Chem. (Engl. Transl.); (United States)

OSTI ID:6909171

Muratbekov, M B; Koroleva, G Y

The principles of the radiation-stimulated oxidation of sulfite by molecular oxygen in the range of pH 11.0-14.6 were investigated. It was established that with increasing sulfite concentration, the kinetic order of the reaction with respect to sulfite falls from 1 to 0, and with respect to oxygen it increases from 0 to 1. This is explained by the fact that at low sulfite concentrations the rate-determining step of the process is the reaction SO/sub 5//sup -/ (HSO/sub 5/) + SO/sub 3//sup 2 -/ ..-->.. SO/sub 4//sup -/ (HSO/sub 4/) + SO/sub 4//sup 2 -/, while at high concentrations it is the reaction SO/sub 3/ + O/sub 2/ ..-->.. SO/sub 5//sup -/. The influence of the pH is explained on the assumption of the existence of two forms of the peroxomonosulfate radical, the more reactive of which is the acid. A number of ratios of reaction rate constants were determined.

• Research Organization: S.M. Kirov Kazakh State Univ.
• OSTI ID: 6909171
• Journal Information: High Energy Chem. (Engl. Transl.); (United States), Journal Name: High Energy Chem. (Engl. Transl.); (United States) Vol. 20:2; ISSN HIECA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
DISPERSIONS
KINETICS
MIXTURES
OXIDATION
OXYGEN COMPOUNDS
PH VALUE
QUANTITY RATIO
RADIATION CHEMISTRY
RADIATION EFFECTS
REACTION KINETICS
SODIUM COMPOUNDS
SOLUTIONS
SPECTROPHOTOMETRY
SULFITES
SULFUR COMPOUNDS
YIELDS