Recovery of actinides extracted by Truer solvent from high level waste using complexing agents II. Counter-current studies

These studies are an extension of earlier work on the recovery of actinides extracted by Truex solvent from simulated high level waste solution, with a mixture of weak acid, weak base and complexing agent used as a strippant. The effectiveness of the proposed strippant, consisting of formic acid, hy drazine hydrate and citric acid, is tested in a counter-current mode using mixer-settler in the present studies. The studies show that near quantitati ve recovery of americium and plutonium is feasible from acid-bearing Truer solvent with no reflux (reextraction) of activity. Use of this strippant re duces considerably the generation of secondary waste.