Separation of Americium(III) and Europium(III) by thermal-swing extraction using thermosensitive polymer gel
✍ Scribed by Kenji Takeshita; Tatsuro Matsumura; Yoshio Nakano
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 309 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0149-1970
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✦ Synopsis
Extraction separation of Am(III) and Eu(III) was examined by the thermal-swing extraction technique using a thermosensitive gel, poly-Nisopropylacrylamide (NIPA) crosslinked with a TPEN derivative, N,N,N 0 ,N 0 -tetrakis(4-propenyl-oxy-2-pyridylmethyl)ethylenediamine (TPPEN). The separation of Am(III) from Eu(III) was observed in the swelling state of gel (5 C) and the separation factor of Am(III) was evaluated as about 18 at pH 5.2. The distribution ratio of Am(III) was reduced to about 1/8 by the volume phase transition from the swelling state (5 C) to the shrinking one (40 C). These results suggest that Am(III) can be separated and recovered effectively from Eu(III) in nitrate aqueous solution by the thermal-swing extraction technique using TPPENeNIPA gel. This technique is applicable to the MA partitioning process, which is one of the important chemical processes in the P&T technology.