Adsorption of Th(IV) in nitric acid medium by a new poly(4-vinylpyridine) resin

A new poly(4-vinylpyridine) resin was prepared and characterized. The adsorption of Th 4+ on resin was studied as a function of contact time, nitric acid concentration, metal ion impurity and initial Th 4+ concentration. The adsorption kinetics and isotherms were analyzed. The results revealed that the adsorption equilibrium for the adsorption of Th 4+ on resin was reached within 30 min. The efficiency of Th 4+ adsorption on resin improves when the nitric acid acidity increases. The adsorption capacity of the resin increases with an increase in the initial concentration of Th 4+ . The thorium distribution coefficient increases with metal nitrate in the system.