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Sequential separation of actinides and lanthanides by extraction chromatography using a CMPO-TBP/XAD7 column

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Abstract

CMPO/TBP sorbed on Amberlite XAD7 resin was used for the separation of actinides and lanthanides from nitric acid solutions by extraction chromatography. The distribution ratios of actinides and lanthanide fission products (Ce, Eu) as a function of acid concentration and some complexing agents were determined. In strong HNO3 medium (>1 mol/l) the tri-, tetra- and hexavalent actinides as well as the lanthanides have shown great affinity for the CMPO/TBP/XAD7 sorbent. The same behavior was found in HCl medium except for trivalent actinides and lanthanides which show lower distribution values in the same acid range. The effect of some complexing agents as DTPA and ammonium oxalate were also investigated. In DTPA only hexavalent actinides showed higher distribution value. On the basis of these differences, an alternative procedure for actinide-lanthanide separation and actinides from each other is proposed.

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Authors and Affiliations

  1. Insituto de Pesquisas Energéticas e Nucleares, Comissão Nacional de Energia Nuclear, Rua Travessa R, 400-CEP 05508-900, São Paulo, SP, Brazil

    M. Yamaura & H. T. Matsuda

Authors
  1. M. Yamaura
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  2. H. T. Matsuda
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Yamaura, M., Matsuda, H.T. Sequential separation of actinides and lanthanides by extraction chromatography using a CMPO-TBP/XAD7 column. J Radioanal Nucl Chem 241, 277–280 (1999). https://doi.org/10.1007/BF02347462

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  • DOI: https://doi.org/10.1007/BF02347462

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