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Report No.

Study on recovery of useful elements from simulated radioactive liquid waste by photo-reduction

Oba, Hironori  ; Saeki, Morihisa; Toshimitsu, Masaaki

The recovery characteristics of useful elements such as platinum group metals from a simulated radioactive solution by photo-reduction using an UV-vis light were experimentally examined. A 10-components simulated solution was prepared by dissolving known amounts of metallic compounds (Ru, Rh, Pd, Mo, Zr, Ba, Sr, Cs, Nd) and sodium in nitric acid of 3 mol/l. The metallic palladium was selectively recovered from the simulated solution containing TiO$$_{2}$$-photocatalyst, while other elements mainly remained in solution. The recovery efficiency of Pd increased with the increase of the TiO$$_{2}$$ concentration and was more than 99% at a TiO$$_{2}$$ concentration above 2 g/l.



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