OXIDATIVE DISSOLUTION OF NEPTUNIUM(IV) OXIDE IN CARBONATE SOLUTIONS
N.M. Chervyakov, A.V. Boyarintsev, S.A. Perevalov, S.I. Stepanov, S.E. Vinokurov
Pages: 94–99
DOI: 10.21175/RadProc.2021.18
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This article presents preliminary results of the study of neptunium(IV)
oxide dissolution in aqueous solutions of Na2CO3 in
the presence of ammonium persulfate and hydrogen peroxide. In these
carbonate systems, the value of NpO2 dissolution yield did not
exceed 1.5–1.6%. Ultrasonication makes it possible to significantly
increase the dissolution rate of neptunium(IV) oxide in Na2CO 3 solutions in the presence of hydrogen peroxide. Under such
conditions, about 25% of neptunium(IV) oxide powder can be dissolved in one
dissolution step (210–270 min). A possible factor affecting the increase of
NpO2 dissolution yield is the increase of oxidative and reaction
activity in the carbonate systems under ultrasonic impact.
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N.M. Chervyakov, A.V. Boyarintsev, S.A. Perevalov, S.I. Stepanov, S.E. Vinokurov, "Oxidative dissolution of neptunium(iv) oxide in carbonate solutions", RAD Conf. Proc, vol. 5, 2021, pp. 94–99, http://doi.org/10.21175/RadProc.2021.18
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