A rapid separation of radioactive cesium by nitrobenzene extraction using the chromium complex [Cr(aniline)2(NCS)4]− |
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| Authors: | M. Koyama T. Mitsuji O. Tochiyama T. Fujinaga |
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| Affiliation: | (1) Chemistry Institute, Faculty of Science, University of Kyoto, Sakyo-ku, Kyoto, (Japan) |
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| Abstract: | A rapid separation of radioactive cesium by the solvent extraction method was investigated. Cesium ions are quantitatively extracted with [Cr(NH2C6H5)2(NCS)4]− into nitrobenzene. EDTA is an effective masking agent for other polyvalent cations. The extracted cesium can be back-extracted into the aqueous phase by shaking with 6N HCl. The method was applied to samples of a natural mixture of fission products and a reactor coolant. The decontamination factors for other predominant isotopes in fission products were 102∼104. The separation of137m Ba from a mixture of137Cs and137m Ba is also described. |
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