Sorption characteristics of uranium onto the strongly acidic cation exchanger, Purolite C100, were investigated. Uranium
sorption capabilities of the adsorbent were estimated by Batch experiments under different conditions; pH, contact time,
uranium initial concentration, temperature, adsorbent dose, interfering ions, and agitation speed. The characteristics of
Purolite C100 were determined using scanning electron microscopy (SEM) and FTIR spectra. Also, the sorption kinetics
and equilibrium parameters were determined. At the optimum conditions, the adsorption capacity of uranium was found to
be nearly 175 mg/g. The kinetics and isotherm studies could show that the uranium sorption onto Purolite C100 is following
the pseudo-second-order model. Uranium sorption is fitted with Langmuir isotherm. Thermodynamic studies indicated an
exothermic behavior with an increase in randomness. The studied procedure was used for uranium ions removal from the
raffinate solution obtained from the solvent extraction unit, Nuclear Materials Authority, Egypt.