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采用表面离子印迹技术,以磁性Fe_3O_4@SiO_2微球为载体,Zn(Ⅱ)为模板,二甲基丙烯酸乙二醇酯为交联剂,合成了磁性锌(Ⅱ)离子表面印迹MAA-SALO聚合物。采用FT-IR、VSM和SEM对产物进行了表征。通过吸附实验表明,与磁性非印迹聚合物相比,印迹聚合物对Zn(Ⅱ)具有良好的吸附和选择识别能力。当温度为291~297K时,在最佳吸附pH 6.0下,可在40min达到吸附平衡,吸附过程能较好地遵循准二级动力学模型,最大吸附容量为52.69mg/g,热力学实验表明吸附是吸热过程,印迹聚合物对Zn(Ⅱ)的吸附行为符合Langmuir模型。
Surface-imprinted MAA-SALO polymerization of magnetic zinc (Ⅱ) ions was synthesized by surface ion imprinting technique using magnetic Fe 3 O 4 @SiO 2 microspheres as a carrier, Zn (Ⅱ) as a template and ethylene glycol dimethacrylate as a crosslinking agent Things. The products were characterized by FT-IR, VSM and SEM. Adsorption experiments show that the imprinted polymer has good adsorption and selective recognition ability to Zn (Ⅱ) compared with magnetic non-imprinted polymer. When the temperature is 291 ~ 297K, the adsorption equilibrium can be reached at 40min at the optimal adsorption pH 6.0. The adsorption process can better follow the pseudo second-order kinetic model with the maximum adsorption capacity of 52.69mg / g. The thermodynamic experiments show that the adsorption Is an endothermic process. The adsorption behavior of the imprinted polymer to Zn (Ⅱ) accords with the Langmuir model.