Selective separation of trivalent Europium(III) from Americium(III) using N, N'- dimethyl-n, N'-di-2-phenylethyl-diglycol amide (mpedga) extractant in ionic liquid

Seong Yun Kim, Tadayuki Takahashi, Hao Wu

Research output: Contribution to journalArticlepeer-review

Abstract

A diglycolamide based N, N'-Dimethyl-N, N'-di-2-phenylethyl-diglycol amide (MPEDGA) extractant was synthesized and dissolved into 1-butyl-3-methylimidazolium nonafluorobutanesulfonate ([C4mim][NfO]) to prepare the extraction phase. Its separation performance of Am-241 with Eu-152 in nitric acid solution was investigated. The extraction kinetics were fast and could reach equilibrium within 15 min. When [HNO3] = 0.1 M, the maximum SFEu-152/ Am-241 was obtained as 124. Moreover, with increase in the concentration of HNO3, the extraction ability decreased gradually, and SFEu-152/ Am-241 decreased as 3 when [HNO3] reached 4 M. Back extraction was successfully completed by using 1 M guanidine carbonate with 0.5 M ethylenediaminetetraacetic acid (EDTA) or 1 M guanidine carbonate with 0.5 M diethylenetriaminepentaacetic acid (DTPA), respectively. Slope analysis revealed a 1:3 complex was formed. Effect of temperature further clarified the extraction process was exothermic.

Original languageEnglish
Pages (from-to)49-57
Number of pages9
JournalSolvent Extraction Research and Development
Volume28
Issue number1
DOIs
Publication statusPublished - 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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