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Report No.

Radiation-induced reduction of metal ions in aqueous solution systems and its application

Nagaishi, Ryuji ; Aoyagi, Noboru   ; Yamada, Reiji; Hatano, Yoshihiko; Yoshida, Zenko

Promotion of chemical reactions by adding oxide particles to aqueous solution under the irradiation of ionizing radiations has been paid attention especially from the practical viewpoint, so that hydrogen production and decomposition of toxic organic compounds studied. On the other hand, redox of metal ions has not been studied very much since successive reactions after the redox become complicated. In the present study, reduction behavior of metal ions in aqueous solution systems irradiated by $$gamma$$-ray and electron beam was measured, the reduced amount was compared with that by water radiolysis, and then the promotion of reduction by adding oxide particles was found out quantitatively. The application of reduction system to treatment of toxic substances in industry and environment, and to recovery of useful materials from high-level radioactive wastes (HLW), and the utilization of HLW as a radiation resource were also proposed.



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