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Solvent extraction of Eu, Th, U and am by N,N′-dimethyl-N,N′-dihexyl-3-thiopentanediamide and thenoyltrifluoroacetone

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Abstract

The diamide, N,N′-dimethyl-N,N′-dihexyl-3-thiopentanediamide (DMDHTPDA) was synthesized and thested for extraction of Eu(III), Am(III), Th(IV) and U(VI). DMDHTPDA shows a very weak complexation with these metal ions, which can be attributed to the soft base nature of the sulfur atom. None of the cations were extracted into the organic phase when DMDHTPDA alone was present. Synergistic extraction was measured for DMDHTPDA plus thenoyltrifluoroacetone. From the extraction dependencies on pH and extractant concentration, formation of mixed TTA+DMDHTPDA complexes were indicated. Except for the Th(IV) system, the separation and synergistic factors were smaller for the TTA+DMDHTPDA extractant than for the system of TTA+DMDHOPDA (the oxo ether analog of DMDHTPDA).

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Authors and Affiliations

  1. Analytical Chemistry Laboratory, Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute, 319-11, Tokai, Ibaraki, Japan

    Y. Sasaki

  2. Department of Chemistry, The Florida State University, 32306-3006, Tallahassee, Florida, USA

    G. R. Choppin

Authors
  1. Y. Sasaki
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  2. G. R. Choppin
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Sasaki, Y., Choppin, G.R. Solvent extraction of Eu, Th, U and am by N,N′-dimethyl-N,N′-dihexyl-3-thiopentanediamide and thenoyltrifluoroacetone. J Radioanal Nucl Chem 222, 271–274 (1997). https://doi.org/10.1007/BF02034285

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  • DOI: https://doi.org/10.1007/BF02034285

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