Mass-transfer coefficients at the uranium adsorption from solution on ion exchange resins

The process of uranium adsorption on ion exchange resins is a mass-transfer process of solid-liquid nature asociated with chemical reaction. Mathematical models used in these studies considers a spherical ion exchange resin grain where on its surface and its pores is taking place the chemical reaction. This paper presents experimental data of the uranium adsorption from alkaline solutions on a strong basic ion exchange resin, second type in chlorine form. The resin and the solution are contacting in two ways: fixed bed and perfect mixing. The optimal resin size and mass transfer coefficient was established for uranium adsorption from alkaline solutions. Also, criterial relation were established between mass-transfer process variables, impulse transfer, equipment geometry used for the experiments. (orig.)