Abstract
In this work, the resin capacity factors of Ac, Am and Th on the DGA extraction chromatographic resin have been investigated between 0.5 and 2.0 M nitric acid without and with addition of elevated concentrations of the selective tetravalent complexant, 343HOPO. The resin capacity factors decreased with increasing 343HOPO concentration but remained high enough to support a selective removal of a tetravalent element. The Ac and Am capacity factors were also investigated under Th loading which yields generally reduced uptake on the resin. It was shown that loading effects could be fully scavenged by the addition of 343HOPO complexant. These results indicate that separation steps for Ac involving significant amounts of Th can be handled by selective tetravalent complexation with the DGA system.
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Malmbeck, R., Banik, N.l. & Nicholl, A. DGA resin capacity factors for Ac, Am and Th under tetravalent actinide selective complexation. J Radioanal Nucl Chem 329, 1387–1392 (2021). https://doi.org/10.1007/s10967-021-07774-0
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DOI: https://doi.org/10.1007/s10967-021-07774-0