The kinetic, equilibrium and thermodynamic characteristics of U(VI) recovery by the strong base anion exchange resin Ambersep 920U SO 4 from Gabal Gattar sulfate leach liquor have been determined. Batch sorption experiments are performed to evaluate the optimum conditions at pH2, 200 mg resin dose for 120 min contact time at room temperature. The maximum sorption capacity reaches to 58 mg/g at 298 K. The kinetics data are well described by the pseudo-second-order kinetic model at different uranium concentrations. The experimental results obtained at various temperatures showed that the adsorption pattern on the studied resin has followed Langmuir isotherm model. The evaluation of thermodynamic parameters (free energy change DG, enthalpy change DS, entropy change DH, activation energy E a and sticking probability S*) indicate that the adsorption process is spontaneous in nature, endothermic, randomness and chemisorptions. Uranium(VI) can be completely desorbed from the loaded resin using 0.5 M HNO 3 solution. Finally, the optimized factors have been carried out for uranium(VI) recovery from G. Gattar leach liquor.

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The Al 2 O 3 -SiO 2 -BFS (AS-BFS) solid adsorbent was developed from blast furnace slag (BFS). The potentiality of the AS-BFS for uranium ion removal from an aqueous medium, via the batch method, was explored and disused in terms of dynamic and isothermal properties. The sorbent exhibited good reusability, a high capacity for uranium ions, and a good specific surface area. The results showed that the sorbent evacuated uranium at about 88.5 mg/g. The sorbent represents a promising waste-derived substitute for other sorbents for water treatment.