Adsorptivity of polyvinylpolypyrrolidone for selective separation of U(VI) from nitric acid media |
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| Authors: | M. Nogami Y. Sugiyama T. Kawasaki M. Harada Y. Morita T. Kikuchi Y. Ikeda |
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| Affiliation: | (1) Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1-N1-34 O-okayama Meguro-ku, Tokyo 152-8550, Japan;(2) Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan;(3) Mitsubishi Materials Corporation, Mukoyama, Naka-shi, Ibaraki 311-0102, Japan |
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| Abstract: | Adsorptivity of polyvinylpolypyrrolidone (PVPP), a candidate resin with selectivity to U(VI) in HNO3 media, to various metal ions was examined. It was found that PVPP has a strong adsorptivity to U(VI) in wide concentration range of HNO3. The Scatchard plot analysis revealed that the adsorption of U(VI) by PVPP occurs at plural binding sites. The infrared spectroscopic analysis suggested that the strong binding site is due to the coordination of the carbonyl oxygen atom and the nitrogen atom in the pyrrolidone ring to UO2 2+. It was also found that fission product ions except Re(VII) as the simulant of Tc(VII) and Pd(II) are not adsorbed onto PVPP. The adsorptivities to Tc(VII) and Pd(II) species are weak, indicating that U(VI) can be separated from other metal ions by PVPP. |
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