Speciation study of Eu(III) and Cm(III) in anion exchange separation system using LiCl-methanol solvent mixtures.
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Accession number;01A0231191
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| Title;Speciation study of Eu(III) and Cm(III) in anion exchange separation system using LiCl-methanol solvent mixtures. |
| Author;
ARISAKA MAKOTO
(Shizuokadai Daigakuinrikogakukenkyuka)
KIMURA TAKAUMI
(Japan Atomic Energy Res. Inst., Advanced Sci. Res. Center, JPN)
KATO YOSHIHARU
(Japan Atomic Energy Res. Inst., Advanced Sci. Res. Center, JPN)
TAKEISHI HIDEYO
(Japan Atomic Energy Res. Inst., Advanced Sci. Res. Center, JPN)
SUGANUMA HIDEO
(Shizuokadai Daigakuinrikogakukenkyuka)
YOSHIDA ZENKO
(Japan Atomic Energy Res. Inst., Advanced Sci. Res. Center, JPN)
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Journal Title;Abstracts of Papers. Symposium on Radiochemistry
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Journal Code:F0139B
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ISSN:1345-2762
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VOL.44th;NO.;PAGE.34(2000)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The separation mechanism of M(III) [M=Eu, Cm] in anion exchange system using lithium chloride-methanol solvent mixtures was discussed on the basis of the speciation of M(III). The inner-sphere hydration number (NX;X=H2O) of M(III) was used for the speciation in this work. The NX of M(III) in solution and resin phases were determined by measurements of the luminescence lifetimes. It was revealed from the results that (1) the complexation of Cm(III) with chloride ion is much stronger than that of Eu(III), (2) higher order chloro complexes of M(III) are formed in resin phase and (3) the complexation with chloride ion is promoted by the methanol addition. Consequently, the increases of Kd with increasing lithium chloride and methanol concentrations results from the effects of (2) and (3). Moreover, the enlargement of separation factor [Kd(Cm)/Kd(Eu)] with increasing methanol concentration is due to the effect of (1). (author abst.) |
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