Synergistic Extraction of Am(III) and Eu(III) by Tris(2‐pyridylmethyl)Amine with Various Anions in 1,2‐Dichloroethane |
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| Authors: | Ken‐Ichiro Ishimori Tsuyoshi Yaita Takaumi Kimura Takashi Yamada Satoshi Shinoda |
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| Affiliation: | 1. Nuclear Cycle Backend Directorate , Japan Atomic Energy Agency , Tokai, Tokai‐mura Ibaraki, 319‐1195, Japan;2. Synchrotron Radiation Research Center, Quantum Beam Science Directorate , Japan Atomic Energy Agency , 1‐1‐1 Koto, Sayo‐cho, Sayo‐gun, Hyogo 679‐5148, Japan;3. Nuclear Science and Engineering Directorate , Japan Atomic Energy Agency , Tokai, Tokai‐mura Ibaraki, 319‐1195, Japan;4. Department of Chemistry, Graduate School of Science , Osaka City University , Sumiyoshi‐ku Osaka, 558‐8585, Japan;5. Gangoji Institute for Research of Cultural Property , 2‐14‐8 Motomachi, Ikoma‐city, Nara, 630‐0357, Japan;6. Department of Chemistry, Graduate School of Science , Osaka City University , Sumiyoshi‐ku Osaka, 558‐8585, Japan |
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| Abstract: | The extraction equilibria of Am(III) and Eu(III) by using a tripodal ligand, tris(2‐pyridylmethyl)amine (tpa), with various lipophilic anions have been investigated. The extractability of both Am(III) and Eu(III) was increased by the combination of tpa and counteranions due to a synergistic effect. The separation factors between Am(III) and Eu(III) were also increased from 7.6 to 49 by the combination of counteranions and organic solvents. The extraction equilibria of Am(III) and Eu(III) with tpa in 1,2‐dichloroethane were determined by slope analysis. It was found that three anions and one molecule of the ligand coordinated to Am(III) and Eu(III) was extracted regardless of the anions. |
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| Keywords: | Americium(III) europium(III) soft donor ligand solvent extraction separation factor |
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