Feasibility of electro-reduction of U(VI) in oxalic acid using an electrolytic CEM-separated cell

The feasibility of electrolytic stripping of U(VI) using an electrolytic separation cell with anode and cathode compartments, separated by a cation exchange membrane (CEM), was investigated as a possible final step in a traditional solvent extraction process to recover uranium. The reduction mechani...

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Veröffentlicht in:Journal of radioanalytical and nuclear chemistry Jg. 326; H. 2; S. 1505 - 1510
Hauptverfasser: Potgieter, M., van der Spoel Badenhorst, W. D., Barry, J. C., van der Westhuizen, D. J., Krieg, H. M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Cham Springer International Publishing 01.11.2020
Springer
Springer Nature B.V
Schlagworte:
Cation exchanging
Chemistry
Chemistry and Materials Science
Comparative analysis
Diagnostic Radiology
Disproportionation
Electrolytes
Feasibility
Hadrons
Heavy Ions
Hydrazines
Inorganic Chemistry
Nitric acid
Nuclear Chemistry
Nuclear Physics
Oxalates
Oxalic acid
Physical Chemistry
Solvent extraction
Uranium
Electrolytic stripping
Oxalic acid electrolyte
Uranium reduction
Cation exchange membrane
ISSN:0236-5731, 1588-2780
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Zusammenfassung:The feasibility of electrolytic stripping of U(VI) using an electrolytic separation cell with anode and cathode compartments, separated by a cation exchange membrane (CEM), was investigated as a possible final step in a traditional solvent extraction process to recover uranium. The reduction mechanism of U(VI)–U(IV) in oxalic acid was compared with the well-known nitric acid and hydrazine mechanism. It was shown that a similar mechanism was followed in both electrolytes, forming a U(V) intermediate followed by disproportionation to U(IV) and U(VI). Measurable amounts of U(IV) were produced and the transfer of U(VI) through the CEM with simultaneous electro-reduction to U(IV) was confirmed.
Bibliographie:ObjectType-Article-1
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ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-020-07367-3