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Adsorption behaviors of trivalent actinides and lanthanides on pyridine resin in lithium chloride aqueous solution |
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| Authors: | Tatsuya Suzuki Maiko Tanaka Yasuyuki Ikeda Shin-ichi Koyama |
| Affiliation: | 1. Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8550, Japan 3. Department of Nuclear System Safety Engineering, Nagaoka University of Technology, Kamitomioka, Nagaoka, Niigata, 940-2188, Japan 2. Oarai Research and Development Center, Japan Atomic Energy Agency, Narita-cho, O-arai-machi, Higashi-ibaraki-gun, Ibaraki, 311-1393, Japan |
| Abstract: | The adsorption behaviors of trivalent actinides and lanthanides on pyridine resin in lithium chloride aqueous solution were investigated. The adsorbed amounts of lanthanides and the degree of mutual separation of lanthanides increased with an increase in the concentration of lithium chloride in aqueous solution. The group separation of the trivalent actinides and lanthanides was observed. This separation phenomenon is similar in a hydrochloric acid solution. However, the adsorption behavior of lanthanides in lithium chloride is different from their behavior in a hydrochloric acid solution. This fact shows that the adsorption mechanisms of lanthanides in a lithium chloride aqueous solution and in a hydrochloric acid solution are different; the adsorption mechanisms are attributed to the ion exchange in a hydrochloric acid solution, and to the complex formation with pyridine group in a lithium chloride solution. |
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