Abstract
Oxidation, dissolution of uranium dioxide with some alkali, alkaline-earth metal man-ganates and permanganates in carbonate solution was studied. The kinetics of decomposition of potassiummanganate and permanganate in solutions of some carbonates were studied spectrophotometrically in the range of pH from 7.8 to 13.0. It was found that the stability of MnO4 - and MnO4 2- ions and the pathways of their decomposition are governed by both pH and the nature of salts. The results of similar measurements in the presence of uranium dioxide showed that throughout the studied range of pH to the higher rate of conversion of KMnO4 to K2MnO4 corresponds the higher rate of oxidation and dissolution of UO2 in carbonate solution.
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