中文摘要：

采用静态吸附法研究了ASA—PGMA／SiO2对稀土离子的螯合吸附性能、吸附动力学和热力学。实验结果表明，其对稀土离子的吸附能力分别为：La3＋：38．6mg·g-1，Pr3＋：39．6mg·g-1，Nd3＋：41．8mg·g-1，Sm3＋：42．8mg·g-1，Tb3＋：46．2mg·g-1。吸附等温模型符合Langmuir型单分子层吸附。介质pH值对材料的吸附能力有很大影响，pH值为6时吸附量最大。以盐酸为洗脱剂，当酸度为0．1mol·L-1时，洗脱率为99．8％。连续吸附-脱附实验表明，ASA—PGMA／SiO2重复使用10次后，吸附能力变化很小。

英文摘要：

The adsorption behavior, adsorption kinet-ics and thermodynamics of ASA-PGMA/SiO2 for rare earth ions were investigated by Static adsorption meth- od. And the adsorption mechanism was studied. The experimental results showed that adsorption capacity of ASA-PGMA/SiO2 for La3＋ , Pr3＋ , Nd3＋ , Sm3＋ and Tb3＋ ions reached 38.6, 39.6, 41.8,42.8 and 46.2 mg·g-1, respectively. The adsorption isotherm data greatly obeyed the Langmuir model. In addition, pH had a great influence on the adsorption capacity. This kind of material had the maximum adsorption capacity at pH 6. Using hydrochloric acid as eluent, when the acidity was 0. 1 mol·L-1, the elution rate was 99.8%. The consecutive adsorption-desorption exper- iments showed that the binding capacity of ASA-PG- MA/SiO2 remains unchanged nearly after 10 times use.