Abstract
Sorption of Na(I), Cs(I) and Co(II) radionuc- lides from aqueous solutions by titanosilicate have been investigated. The time dependent studies for metal ions showed relatively rapid sorption kinetics between 5 and 30 min to reach equilibrium. A batch adsorption model based on assumption of the pseudo-second-order mecha- nism was applied to predict the sorption rate, while the equilibrium capacity was calculated at different tempera- tures. The adsorption of different radionuclides onto titanosilicate was found to be favored at high ions con- centrations and low temperature for Na ? and Co 2? while at high temperature for Cs ? . Activation energy of adsorption was computed to be 2.35, 24.11 and 5.74 kJ/mol for adsorption of Na(I), Cs(I) and Co(II), respectively. The results revealed that the adsorption of Cs ? is the highest relative to Na ? and Co 2? at different conditions which may
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