Review: Solvent Systems Combining Neutral and Acidic Extractants for Separating Trivalent Lanthanides from the Transuranic Elements

摘要: Abstract This paper is a review of recent publications that have focused on combined extractant systems for separating trivalent actinides from the lanthanides. These mixed solvent combine an acidic with neutral to achieve actinide/lanthanide separation. Depending used, three categorizations can be considered, including combinations extractants 1) diamides, 2) carbamoylmethylphosphine oxides, and 3) polydentate nitrogen-donor ligands. relevant indicates that, although there significant potential practical exploitation neutral/acidic single-step separation high-level waste solutions, fundamental chemistry underlying these not yet well understood. For example, strong evidence suggesting adducts form between extractants, nature add...