Cross-Linkage Effects of Styrene-Divinylbenzene Based Pyrrolidone Resin on Adsorption of Actinide Ions in Nitric Acid Solution

The pyrrolidone resin based on styrene-divinylbenzene copolymer was synthesized with the varying ratios of monomers. The proportion of divinylbenzene determines the cross-linkage degree of pyrrolidone resin. We investigated the uranyl ion adsorption on the pyrrolidone resin with varying the cross-linkage in nitric acid solution. We found that the distribution coefficients of uranyl ion depend on the cross-linkage, however, the distribution coefficients are not exactly high in the case of high proportion of pyrrolidone in resin. The cross-linkage effects in the case of constant pyrrolidone concentration were also observed. We explained the cross-linkage effects by permittivity, hydrophobicity, and surface potential of resin.