Current science and technology of the actinides owes much credit to the separation science that played a significant role in the discovery and characterization of the 5f elements. Of course, these techniques require additional improvement and development in order to further understand and describe the chemical properties of the actinides. Finding ways to efficiently partition these transplutonium 5f elements has been a significant technological challenge due to their nearly identical chemical behavior. One potential solution to the challenge of separating americium from curium is based on the fact that americium can be oxidized to higher valence states, while curium remains in the trivalent state. Three oxidizing agents, sodium bismuthate, copper(III) periodate, and sodium persulfate, have been shown to have the ability to oxidize americium. It has been shown that sodium bismuthate is not only capable of oxidizing americium, but can also be used for the separation based on its ion exchange properties. Copper(III) periodate and sodium persulfate have been successfully coupled with other separation methods (<i>e.g.</i>solvent extraction, ion exchange, and extraction chromatography). The goal of this research is to compare the oxidative action of these three oxidizing agents and the extent of oxidation of Am(III) to Am(VI). In addition, the potential of these oxidizing agents as a driving force for the separation of americium from curium on DGA extraction chromatographic resin will be explored. As a result, new potential candidate systems for minor actinide separation can be studied.

Separation of americium in high oxidation states from curium utilizing extraction chromatography

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.