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Modified diglycolamides for grouped actinide separation

Abstract

The EURO-grouped actinide extraction process has been developed to co-separate transuranic actinide elements from spent nuclear fuel, based on an organic solvent composed of two extractants, a diglycolamide (TODGA) and a malonamide (DMDOHEMA). This work aims to simplify the organic formulation, replacing the two extractants with a single modified diglycolamide. Batch experiments were carried out with the new formulation, investigating the extraction behaviour of transuranic elements and important FPs under high Pu loading. The solvent had a Pu loading capacity of > 30 g/L and yielded low distribution ratios for problematic elements, i.e., Sr, Zr, Mo and Fe for acidities up to 2 M HNO3. Although further optimization is needed, the tested molecule is a very promising candidate for a simplified organic solvent for this type of separation.

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Acknowledgements

The authors gratefully acknowledge financial support from the EU GENIORS project and Åforsk foundation.

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Correspondence to Rikard Malmbeck.

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Malmbeck, R., Magnusson, D. & Geist, A. Modified diglycolamides for grouped actinide separation. J Radioanal Nucl Chem 314, 2531–2538 (2017). https://doi.org/10.1007/s10967-017-5614-2

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Keywords

  • GANEX
  • Solvent extraction
  • TODGA
  • Modified DGA