Abstract
The kinetics of the formation of gaseous products and variation in the parameters of acidity (pH) and chemical oxygen consumption (COC) are studied in relation to the γ-radiolysis of aqueous solutions of mixtures of formic, oxalic, and nitric acid as the model system of radiolytic transformations of acid components of liquid radioactive waste. It is found that with an increase in the absorbed dose of γ-radiation, the acidity and the COC value both decrease because of the decrease in the concentration of organic acids in the mixture. The gaseous products CO2 and H2 were identified. Their concentrations increase nonlinearly with the absorbed dose. Radiation-chemical yields of H2 and CO2 are calculated. Using data from experiment and the literature on composition of liquid products of radiolysis of aqueous solutions of acids, kinetics of formation of gaseous products are studied using soft KINET (version 4.2.5).
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