Complexation of lanthanides and actinides by acetohydroxamic acid
Conference
·
OSTI ID:21230355
- British Technology Centre, Nexia Solutions, Sellafield, Seascale, CA20 1PG (United Kingdom)
- Pacific Northwest National Laboratory, Richland, WA 99352 (United States)
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL (United States)
Acetohydroxamic acid (AHA) has been proposed as a suitable reagent for the complexant-based, as opposed to reductive, stripping of plutonium and neptunium ions from the tributylphosphate solvent phase in advanced PUREX or UREX processes designed for future nuclear-fuel reprocessing. Stripping is achieved by the formation of strong hydrophilic complexes with the tetravalent actinides in nitric acid solutions. To underpin such applications, knowledge of the complexation constants of AHA with all relevant actinide (5f) and lanthanide (4f) ions is therefore important. This paper reports the determination of stability constants of AHA with the heavier lanthanide ions (Dy-Yb) and also U(IV) and Th(IV) ions. Comparisons with our previously published AHA stability-constant data for 4f and 5f ions are made. (authors)
- Research Organization:
- Chemical Sciences Division, Oak Ridge National Laboratory (United States)
- OSTI ID:
- 21230355
- Country of Publication:
- United States
- Language:
- English
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