Adsorption of 141Ce(III), 160Tb(III), and 169Yb(III) on the Synthesized Inorganic Ion Exchanger, Zirconium Titanium Phosphate.

Samples of zirconium titanium phosphate inorganic ion exchangers with different Zr : Ti molar ratios were synthesized. The samples were characterized using FT-IR spectroscopy, X-ray diffraction, scanning electron microscopy, and pore size analysis. The adsorption behavior of lanthanide isotopes 141Ce(III), 160Tb(III), and 169Yb(III) was studied in batch experiments. The influence of the V/m ratio (mL g–1), solution pH, contact time, particle size, metal ion concentration, and temperature on the adsorption kinetics was studied. The changes in the Gibbs free energy, enthalpy, and entropy were calculated. The adsorption isotherms and kinetics were analyzed using different models. The adsorption was found to follow the Langmuir isotherm better than the Freundlich isotherm. The pseudo-second-order kinetic model fits the adsorption data. [ABSTRACT FROM AUTHOR]