The pH-dependence of the extrated species of Eu and Am by N,N'-dimethyl-N,N'-dihexyl-3-oxapentanediamide and thenoyltrifluoroacetone.

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  • SASAKI Yuji
    Analytical Chemistry Laboratory, Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute

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  • Ｎ，Ｎ′‐ジメチル‐Ｎ，Ｎ′‐ジヘキシル‐３‐オクサペンタンジアミドとテノイルトリフルオロアセトン協同抽出におけるユウロピウム（ＩＩＩ）及びアメリシウム（ＩＩＩ）抽出錯体種のｐＨ依存性
  • N N ジメチル N N ジヘキシル 3 オクサペンタンジアミド ト テノイル
  • N, N'-ジメチル-N, N'-ジヘキシル-3-オクサペンタンジアミドとテノイルトリフルオロアセトン協同抽出におけるユウロピウム(III)及びアメリシウム(III)抽出錯体種のpH依存性

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Abstract

Based on the solvent extraction of Eu and Am by N, N'-dimethyl-N, N'-dihexyl-3- oxapentanediamide (DMDHOPDA) in the presence of thenoyltrifluoroacetone {TTA (=Htta)} the extraction species of M (a) 3 (x) 3, M (a) 3 (tta) (x) 2, M (a) 2 (tta) 2 (x) and M (a) (tta) 3 were observed (M=Eu and Am, a=DMDHOPDA, and x-=ClO4- or ClCH2COO-). The fraction diagrams of these species could be illustrated; it was obvious that the kind of extracted species depends on the pH condition of the aqueous phase, as well as the ratio of the extractants, [Htta] org/ [DMDHOPDA] org. A higher synergistic effect was observed when a higher degree of tta- and a lower degree of x- was participated in the extraction process. The separation factors of Eu and Am decreased in a higher pH region, because both of the extractants caused chelation to the metal ion.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 46 (3), 181-186, 1997

    The Japan Society for Analytical Chemistry

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