研究了铈(Ⅲ)在氨基磷酸树脂上的吸附行为。试验结果在pH5.0时，静态饱和吸附容量为197mg/g干树脂；用2mol.L-1HCl洗脱，洗脱率为98.1%；表观速率常数k298=2.71×10-5s-1；等温吸附服从Freundlich经验式；吸附反应中的△Ho=50.0kJ.mol-1，△So=286J.mol-1.K-1，△Go=-35.1kJ.mol-1。树脂功能基与Ce3+的配比为2∶1；并用红外光谱探讨了树脂与铈的成键。
The sorption behavior of amino methylene phosphonic acid resin (APAR)for cerium(Ⅲ)is investigated.Experimental results show that the statically saturated sorption capacity is 197mg/g.resin;Ce(Ⅲ)adsorbed on APAR can be eluted with 2mol.L-1 HCl,elution percentage is 98.1%；The apparent rate constant is k298=2.71×10-5s-1；The sorption behavior of APAR for Ce(Ⅲ) obeys the Freundlich isotherm.The sorption themodynamicparameters such as enthalpy change △Ho,free energy change △Go and entropy change △So of sorption (APAR)for Ce(Ⅲ)are 50.0kJ.mol-1，-35.1kJ.mol-1，286J.mol-1.K-1,respectively.The coordination molar ratio of the functional group of APAR to Ce(Ⅲ) is 2∶1.The sorption mechanism of APAR for Ce(Ⅲ) is examined by IR spectrometry.
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