Abstract
Adsorption behavior of Eu3+ on granulated α-zirconium phosphate (α-ZrP) has been studied by batch and column methods. The distribution coefficients (K d) of Eu3++ into α-ZrP increased with equilibrium pH, suggesting ion-exchange adsorption. The K d values were in the order of Eu3+>Cs+>Sr2+>Co2+Na+. An expansion of interlayer distance of α-ZrP in the presence of Na+ enables the large hydrated Eu3+ ions to be adsorbed on this exchanger, and the adsorption isotherm of Eu3+ ions followed Freundlich's adsorption formula. The granulated α-ZrP has high thermal stability and acid resistance. The breakthrough capacity for Eu3+ linearly increased with pH of the effluent.
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