Abstract
Hydrotalcite is an anion exchanger, having layered structure like cationic clay minerals. Adsorption behavior of fission-derived pertechnetate(VII) anion onto hydrotalcite was studied from various solutions bearing humic acid. The partition coefficient of Tc-99 radiotracer indicated that interaction between deprotonated humate and cationic surface of hydrotalcite could compete with pertechnetate adsorption. In the series of experiments were found the other factors influencing the adsorption behavior were pH, concentration of coexisting salt, and hydrotalcite loading.
