Japan Atomic Energy Agency & Graduate School of Environment and Information Sciences, Yokohama National University
Japan Atomic Energy Agency
Japan Atomic Energy Agency
Graduate School of Environment and Information Sciences, Yokohama National University
Department of Chemistry, Graduate School of Science, Chiba University
抄録
We studied the stepwise formation constants (β) of water-soluble diglycolamide (DGA) and dioxaoctanediamide (DOODA) for the mutual separation of Ln in a solvent extraction system. TODGA (N,N,Nʹ,Nʹ-tetraoctyl-diglycolamide) and DOODA(C8) (N,N,Nʹ,Nʹ-tetraoctyl-dioxaoctanediamide) exhibit opposite behaviors in extracting both light and heavy Ln through Ln-patterns. Metal complexes of two- and three-folding with water-soluble DOODA and DGA, respectively, were found, and each β value was calculated using distribution ratios. Taking β, their distribution ratio, D, and separation factor, SF, values into consideration, the suitable separation conditions (aqueous phase: 30 mM DOODA(C2) in 1 M HNO3; organic phase: 0.1 M TODGA in n-dodecane) of multistage extraction (10 × 10 extraction using aqueous and organic phases, including one sample solution) were determined. In this study, La, Pr, and Nd were mainly present in the aqueous phase, whereas Sm–Dy existed in the organic phase. Although these two groups can be easily separated into two phases, the resolution, Rs, values provide for little mutual separation between La–Nd and Sm–Dy under the present conditions.
雑誌名
Journal of Radioanalytical and Nuclear Chemistry
巻
331
号
3
ページ
1483 - 1493
発行年
2022-02-03
ISSN
02365731
書誌レコードID
AA11120189
DOI
info:doi/10.1007/s10967-022-08204-5
権利
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s10967-022-08204-5
Complex formation of light and heavy lanthanides with DGA and DOODA, and its application to mutual separation in DGA–DOODA extraction system
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