Investigation on separation and extraction behavior of An and Ln using hydrophilic and lipophilic multidentate ligands

Sasaki, Yuji  ; Kaneko, Masashi   ; Ban, Yasutoshi  

Using TODGA and ADAAM, which are developed by JAEA, the recovery of total amounts of An and Ln, and mutual separation of Am/Cm have been achieved. Recent studies give the very high SF(An/Ln) over 100 and show the different chemical behavior between An and Ln, using solvent extraction of tri, tetradentate extractant and masking agent. We confirm these conditions to satisfy the subsequent ones, to maintain the suitable concentrations of extractants and masking agents for Ln recovery, and to show high SF using sets of D values over and under 1. In the presentation, we will show the difficulties of An/Ln separation and direction of researches, and present the SF(An/Ln) using various extractants and masking agents.