Oxidative Dissolution of Uranium Dioxide and Triuranium Octoxide in Carbonate Media

Oxidative dissolution of powdered UO 2 and U 3 O 8 samples in Na 2 CO 3 /NaHCO 3 –H 2 O 2 solutions was studied. The U 3 O 8 samples were prepared from UO 2 at 480–1200°С. The rate and degree of the U 3 O 8 dissolution depend on the characteristics of the oxide powder and on the dissolution temperat...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2023-04, Vol.65 (2), p.257-260
Main Authors: Chervyakov, N. M., Boyarintsev, A. V., Stepanov, S. I.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Dissolution
Hydrogen peroxide
Nuclear Chemistry
Rate constants
Sodium bicarbonate
Uranium
Uranium dioxide
Uranium oxides
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Summary:Oxidative dissolution of powdered UO 2 and U 3 O 8 samples in Na 2 CO 3 /NaHCO 3 –H 2 O 2 solutions was studied. The U 3 O 8 samples were prepared from UO 2 at 480–1200°С. The rate and degree of the U 3 O 8 dissolution depend on the characteristics of the oxide powder and on the dissolution temperature. The process rate constants under the conditions of the experiments were calculated. Based on the results obtained, the conditions of complete dissolution of UO 2 and U 3 O 8 in Na 2 CO 3 /NaHCO 3 –H 2 O 2 solutions were determined.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362223020182