Decontamination of radioactive liquid waste with hexacyanoferrate(II)

Takahatake, Yoko  ; Watanabe, So  ; Shibata, Atsuhiro  ; Nomura, Kazunori  ; Koma, Yoshikazu  

Concerning decontamination of a radioactive liquid waste which comprise seawater and nuclides from irradiated fuels and activated materials, the in-situ generation of metal hexacyanoferrates(II) by adding potassium hexacyanoferrate(II) and co-decontamination of Cs and some activation products were investigated. Transition metals arising from seawater in the waste solution precipitates in the preference order of Zn Ni Co Mn according to their solubility. The precipitate adsorbs Cs, and decontamination will be attained by the following sedimentation with a polymer and filtration, as an example. Decontamination factor of activated products, Co and Mn, is dependent on concentration of hexacyanoferrate(II) in the solution.