A THEORY FOR SELECTING THE COMPLEXING AGENT FOR THE ENRICHMENT OF URANIUM ISOTOPES WITH A PROCESS OF CATIONIC EXCHANGE Ⅱ. STUDY ON MASS TRANSFER OF ACCELERATED

The accelerative effect on the UO2 2+-H+ exchange process exerted by the presence of U(Ⅳ) or Ti(Ⅳ) or Fe(Ⅱ) in resin phase and H2SO4, HCI and six kinds of carboxylic acid in liquid phase is studied and confirmed with macrorecticular sulfonic ion exchange resin in this paper. The correspondence of inner diffusion coefficient D with detained time is verified as an universal rule; the order of accelerative effect exerted by anionic ion is clarified; the cause of accelerative effect exerted by anionic ion is explained by adsorption double layer theory and theoretical analysis for the initial stage during the UO2 2+-H+ exchange process is given.