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Solvent extraction of lanthanides and actinides using phosphine donor extractant

Miyashita, Sunao; Kitatsuji, Yoshihiro ; Kimura, Takaumi 

Solvent extraction of trivalent actinide ($$^{241}$$Am and $$^{244}$$Cm) and lanthanide (Eu) ions using phosphine donor extractants such as Triphenylphosphine (TPP), Bis(diphenylphosphino)methane (DPPM) and Bis(diphenylphosphino)ethane (DPPE) were investigated. Compared to the same experimental conditions, the distribution ratios were decreased in the following order, DPPM $$>$$ DPPE $$>$$ TPP. The separation factors between Am and Eu are 80 for DPPM, 40 for DPPE and 7 for TPP respectively. This results showed that DPPM is useful extractant in order to separate trivalent actinide and lanthanide ions.



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