Abstract

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.

中文翻译：

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合成无机离子交换剂磷酸钛锆对141 Ce（III），160 Tb（III）和169 Yb（III）的吸附

摘要

合成了具有不同Zr：Ti摩尔比的锆钛酸钛无机离子交换剂样品。使用FT-IR光谱，X射线衍射，扫描电子显微镜和孔径分析对样品进行表征。批量实验研究了镧系元素同位素¹⁴¹ Ce（III），¹⁶⁰ Tb（III）和¹⁶⁹ Yb（III）的吸附行为。V / m比的影响（mL g ^–1），溶液的pH值，接触时间，粒径，金属离子浓度和温度对吸附动力学的影响。计算了吉布斯自由能，焓和熵的变化。使用不同的模型分析了吸附等温线和动力学。发现吸附遵循朗缪尔等温线要好于Freundlich等温线。拟二级动力学模型拟合吸附数据。