Uranium sorption from phosphoric acid solutions using selective ion exchange resins: Part II. Kinetic studies |
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| Authors: | S Gonzalez-Luque M Streat |
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| Affiliation: | Imperial College of Science and Technology, Department of Chemical Engineering and Chemical Technology, London SW 7 Great Britain |
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| Abstract: | Experiments have shown that the sorption of uranium from strong phosphoric acid solutions onto four D2EHPA/TOPO based ion exchange resins and one aminophosphonic acid resin is particle diffusion controlled in the uranium concentration range 42–780 μM. Interdiffusion coefficients of about 10?12 m2s?1 were obtained for D2EHPA/TOPO resins and 0.14 × 10?12 m2s?1 with the aminophosphonic acid exchanger at 20°C in 3 M H3PO4. Both homogeneous particle diffusion, based on Fick's Law, and the ash layer diffusion model fitted the kinetic measurements. |
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| Keywords: | To whom correspondence should be sent |
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