Solvent Extraction of Uranium(VI) from Acidic and Alkaline Solutions Using Ionic Liquid-Based Systems

Abstract— This review addresses the issue of efficient and selective extraction of uranium(VI) from various media using systems based on ionic liquids. It examines the current technological process for extracting uranium(VI) from spent nuclear fuel solutions and identifies its shortcomings. This review analyzes and systematizes information on the main types of ionic liquids being studied for uranium(VI) extraction, either as solvents, extractants, or in their pure form. Special attention is given to commercially available ammonium and phosphonium ionic liquids, which have demonstrated high efficiency in extracting uranium(VI) from hydrochloric and alkaline media, while in nitric acid media, the highest distribution coefficients are observed for tetravalent actinides [1].