Dissolution of actinide oxides in HNO3 using a concentrated ozone-oxygen mixture in the presence of Ce(IV) ions

Accumulation of Ce(IV) in HNO 3 solutions as a result of Ce(III) oxidation with an ozone-oxygen mixture (OOM) was studied. An increase in the ozone concentration in OOM from 30 to 180 mg dm −3 leads to a considerable increase in the rate of Ce(III) oxidation to Ce(IV). With concentrated OOM, the Ce(...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2011-06, Vol.53 (3), p.250-255
Main Authors: Gelis, V. M., Shumilova, Yu. V., Ershov, B. G., Maslennikov, A. G., Mulyutin, V. V., Seliverstov, A. F.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Nuclear Chemistry
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Summary:Accumulation of Ce(IV) in HNO 3 solutions as a result of Ce(III) oxidation with an ozone-oxygen mixture (OOM) was studied. An increase in the ozone concentration in OOM from 30 to 180 mg dm −3 leads to a considerable increase in the rate of Ce(III) oxidation to Ce(IV). With concentrated OOM, the Ce(III) to Ce(IV) oxidation yield of two ions per ozone molecule is attained. An increase in the steady-state concentration of Ce(IV) in the solution leads to considerable acceleration of the dissolution of highly calcined UO 2 .
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362211030040