Using 3-chloropropyltriethoxysilane as an anchor, the functional monomer linear polyethylenimine(PEI) was grafted on the surface of mesoporous MCM-41. La³⁺ was selected as the template ion and epichlorohydrin was used as the crosslinker. A lanthanum ion MCM-41 imprinted polymer (La(III)-IIP-PEI/MCM-41) was prepared, and a non-ion-imprinted polymer (NIP-PEI/MCM-41) was arranged in the same manner. The La³⁺ surface imprinted polymer was characterized by means of infrared spectrometer, thermogravimetric(TG) analyzer, and scanning electron microscope(SEM). The optimal adsorption conditions and selective adsorption properties of La(III)-IIP-PEI/MCM-41 for La³⁺ were determined by static adsorption method and adsorption performance. Experiments show that the maximum adsorption capacity of La(III)-IIP-PEI/MCM-41 can reach 212.69 mg g¹. Adsorption equilibrium can be reached at 30 min. Quasi-second-order kinetic model can be used to describe its adsorption mechanism. La(III)-IIP-PEI/MCM-41 also has a strong selectivity for La³⁺.

中文翻译：

---

镧离子MCM-41印迹聚合物的制备及吸附性能

以3-氯丙基三乙氧基硅烷为锚定剂，将功能性单体线性聚乙烯亚胺（PEI）接枝在介孔MCM-41表面。选择La ³⁺作为模板离子，并使用环氧氯丙烷作为交联剂。制备了镧离子MCM-41印迹聚合物（La（III）-IIP-PEI / MCM-41），并且非离子印迹聚合物（NIP-PEI / MCM-41）以相同的方式排列。利用红外光谱仪，热重分析仪和扫描电子显微镜对La ³⁺表面印迹聚合物进行了表征。La（III）-IIP-PEI / MCM-41对La ³⁺的最佳吸附条件和选择性吸附性能用静态吸附法和吸附性能测定。实验表明，La（III）-IIP-PEI / MCM-41的最大吸附量可达212.69 mg g ¹。30分钟即可达到吸附平衡。准二级动力学模型可以用来描述其吸附机理。La（III）-IIP-PEI / MCM-41对La ³⁺也具有很强的选择性。