Phytosorbents of the new generation: evaluating the sorption power with respect to uranium

Sorption properties of a new class of sorbents, i.e. phytosorbents, with respect to uranium were studied in model solution and real radionuclide-contaminated water. Dependence of sorption on specific mass of the sorbent was considered. Kinetic parameters of sorption were determined and diffusion inside the sorbent grain was identified as the limiting stage of the process. The diffusion coefficients were calculated; the exchange half-times were determined and confirmed. Uranium sorption was studied as influenced by pH. It was ascertained that the maximum of uranium sorption was attained at pH < 4. Exchange capacities of the sorbents were determined