Separation of trivalent actinides and lanthanides with sulfur donor ligands and extractants
The separation of trivalent actinides and lanthanides in the processing of used nuclear fuel is challenging due to the similar sizes, charges, and redox properties of the two classes of metals. Typical separations procedures rely on ligands or extractants that can coordinate the metals with polarizable soft donor atoms such as nitrogen or sulfur. These soft donor atoms display a preference for coordinating the actinides which can be utilized to provide selectivity in this separation. Among the different ligands and extractants used for this separation, the sulfur containing dithiophosphinic acids ...
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