Experimental study of uranium adsorption from solid waste solution of the Monel reactor using the Amberlite IRA- 910 resin in the ion exchange process

The extraction of uranium from a solid waste by using the resin ion exchange process is the subject of this study. For this purpose, the solid waste of the fluorination reactor was selected. In order to uranium recovery from this solid waste, sulfuric acid was used as a solvent and IRA-910 amberite resin was used for adsorption by ion exchange process. The results showed that uranium was adsorbed by this resin with 80-90 % efficiency. The optimum mass of resin for adsorption from sulfuric acid medium with initial concentrations of 180, 270 and 450 mg / l uranium were 0.15, 0.3 and 0.5 g, respectively. The effect of uranium initial concentration, contact time and temperature on adsorption was investigated. The optimum contact time was 2 hours. The thermodynamic parameters of enthalpy change, entropy, and Gibbs energy change for the initial uranium concentration of 370 mg / l were calculated and it was determined that this process is endothermic. Experimental data for the initial uranium concentration of 185 mg / l and the sulfuric acid concentration of 0.09 and 0.02 M are in excellent agreement with the Freundlich isotherm absorption. The kinetic parameters of uranium uptake on IRA-910 for Lagergren and pseudo second order adsorption kinetics were calculated.