Selective Extraction of Americium from Curium and the Lanthanides by the Lipophilic Ligand CyMe4BTPhen Dissolved in Aliquat-336 Nitrate Ionic Liquid

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Institutes & Expert groups

  • FZJ - Forschungszentrum Jülich GmbH
  • KUL - Katholieke Universiteit Leuven

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Abstract

The feasibility of separating americium from curium and the lanthanides was studied in batch solvent extraction experiments using an organic solvent composed of 0.01 mol L−1 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro- 1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4BTPhen) in the ionic liquid Aliquat-336 nitrate [A336][NO3] from feed solutions containing N,N,N’,N’-tetraethyl diglycolamide (TEDGA), stable lanthanide ions and tracers of 241Am, 244Cm, and 152Eu. The combined use of a lipophilic and a hydrophilic ligand with opposite selectivity for Am(III) vs. Cm(III) and Ln(III) allowed the separation of Am(III) from Cm(III) and Ln(III) from moderate acidic feed solutions (1 mol L−1 HNO3, SFAm/Cm = 3.1–3.9, SFAm/La > 75, SFAm/Eu ≥ 3000).

Details

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalSolvent extraction and ion exchange
Volume38
Issue number2
DOIs
Publication statusPublished - 21 Jan 2020

Keywords

  • Ionic liquids, Americium/curium separation, Solvent extraction, CyMe4BTPhen, TEGDA, Aliquat-336

ID: 6784243