Experimental findings on actinide recovery utilizing oxidation by peroxydisulfate followed by ion exchange: Fuel cycle research & development

Technical Report · Mon Aug 31 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1215482· OSTI ID:1215482

Hobbs, D. T. ^[1]; Shehee, T. C. ^[1]

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1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

Our research seeks to determine if inorganic ion-exchange materials can be exploited to provide effective minor actinide (Am, Cm) separation from lanthanides. Previous work has established that a number of inorganic and UMOF ion-exchange materials exhibit varying affinities for actinides and lanthanides, which may be exploited for effective separations. During FY15, experimental work focused on investigating methods to oxidize americium in dilute nitric and perchloric acid with subsequent ion-exchange performance measurements of ion exchangers with the oxidized americium in dilute nitric acid. Ion-exchange materials tested included a variety of alkali titanates. Americium oxidation testing sought to determine the influence that other redox active components may have on the oxidation of Am^III. Experimental findings indicated that Ce^III, Np^V, and Ru^II are oxidized by peroxydisulfate, but there are no indications that the presence of Ce^III, Np^V, and Ru^II affected the rate or extent of americium oxidation at the concentrations of peroxydisulfate being used.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 1215482
• Report Number(s): SRNL-STI-2015-00433
• Country of Publication: United States
• Language: English