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Report No.

Development of uranium recovery technique from materials contaminated with uranium using ionic liquid, 4; Electrolytic recovery of uranium from ionic liquid

Ohashi, Yusuke ; Asanuma, Noriko*; Harada, Masayuki*; Ikeda, Yasuhisa*

In the cyclic voltammogram of BMICl solution when dissolving metal waste contaminated with UF$$_{4}$$, uncoupled reduction peak and a pair of oxidation-reduction peaks were observed around -1.0V and 0V. The reduction peak was considered to correspond to the reduction of U(VI) $$rightarrow$$ U(V). A pair of peaks were considered to be the reversible peak of Fe(III) $$rightarrow$$ Fe(II). After the electrolysis of the solution, the working electrode was washed by ethanol. From the results of XPS measurement, uranium component was observed on the surface of the electrode though no Fe conponent was observed. Hence we would expect that the uranium component could be recovered by electrolysis from the solution generated in the decontamination treatment of the steel wastes contaminated with UF$$_{4}$$ in BMICl.



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