Dissolution of uranium dioxide powder in carbonate-peroxide solution

The effects of different dissolution parameters (solid–liquid ratio, peroxide concentration, carbonate concentration, countercation and pH) on the dissolution behavior of UO 2 powder in carbonate-peroxide solution were investigated. The results indicate that increasing H 2 O 2 concentration evidentl...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2022-05, Vol.331 (5), p.2245-2252
Main Authors: Hou, Chenxi, He, Hui, Sun, Jinjie, Yang, Bei, Fang, Haofan, Jiao, Caishan, He, Mingjian
Format: Article
Language:English
Subjects:
Carbonates
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Dissolution
Hadrons
Heavy Ions
Hydrogen as fuel
Hydrogen peroxide
Inorganic Chemistry
Nuclear Chemistry
Nuclear energy
Nuclear industry
Nuclear Physics
Physical Chemistry
Powders
Reactor fuel reprocessing
Sodium carbonate
Uranium
Uranium dioxide
Uranium ores
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Summary:The effects of different dissolution parameters (solid–liquid ratio, peroxide concentration, carbonate concentration, countercation and pH) on the dissolution behavior of UO 2 powder in carbonate-peroxide solution were investigated. The results indicate that increasing H 2 O 2 concentration evidently enhances the dissolution of UO 2 , while increasing carbonate concentration has no apparent influence on the dissolution rate. (NH 4 ) 2 CO 3 presents a noticeable behavior over the performance of Na 2 CO 3 at the same initial pH. Additionally, the dissolution behavior of UO 2 is significantly affected by pH value, since the equilibrium concentration of uranium reached lowest in Na 2 CO 3 solution at around initial pH 9.4.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-022-08263-8