SELECTIVE RECOVERY OF URANIUM(VI) FROM AQUEOUS ACID-SOLUTIONS USING MICELLAR ULTRAFILTRATION

Preconcentration and removal of uranyl ions from aqueous solutions mer e achieved by using micellar-enhanced ultrafiltration with complexing micellar aggregates composed of Triton X-100 and different hydrophobic ligands, Derivatives of 4-aminosalicylic acid (PAS) and of 1-(2-pyrid ylazo)-2-naphthol (PAN) having tuned alkyl chains were used as suitabl e chelating agents, The selective recovery of uranyl from acid samples containing also Sr-II and Cd-II is possible using the multi-step ultr afiltration approach with the PAN derivatives, whereas effective urany l retention can be obtained with salicylates only in neutral to basic media.