Zhang Hui-xin, Dou Qian, Jin Xiu-hong, Zhang Jie, Yang Ting-ru, Han Xu, Wang Dong-dong
a School of Chemical Engineering , Hebei University of Technology , Tianjin 300130 , People's Republic of China.
b CNOOC Tianjin Chemical Research and Design Institute , Tianjin 300131 , People's Republic of China.
Environ Technol. 2015;36(21):2702-11. doi: 10.1080/09593330.2015.1043748. Epub 2015 May 27.
A novel magnetic Zn (II) ion-imprinted polymer was prepared by the surface ion-imprinted technique by using magnetic Fe3O4@SiO2 microspheres as supporter, methacrylic acid and salicylaldoxime as monomers, ethylene glycol dimethacrylate as the crosslinker. The products were characterized by Fourier transform infrared, X-ray photoelectron spectrometer, vibrating sample magnetometer and scanning electron microscope. The adsorption experiments showed that the imprinted polymer was employed successfully in comparison with non-imprinted polymer. When the temperature was in a range of 291-297 K, the maximum adsorption was about 52.69 mg g(-1) with an optimal pH 6.0 for an equilibrium time of 40 min. The imprinted polymer possessed high selectivity and specific recognition towards Zn (II). The Langmuir adsorption model was more favourable than the Freundlich or the Temkin adsorption model. Thermodynamic experiment showed that the adsorption was a spontaneous and endothermic process for Zn (II). The mechanism for Zn (II) adsorption on the imprinted polymer was investigated.
采用表面离子印迹技术，以磁性Fe3O4@SiO2微球为载体，甲基丙烯酸和水杨醛肟为单体，乙二醇二甲基丙烯酸酯为交联剂，制备了一种新型磁性锌（II）离子印迹聚合物。通过傅里叶变换红外光谱、X射线光电子能谱、振动样品磁强计和扫描电子显微镜对产物进行了表征。吸附实验表明，与非印迹聚合物相比，印迹聚合物得到了成功应用。当温度在291-297 K范围内时，最大吸附量约为52.69 mg g(-1)，最佳pH值为6.0，平衡时间为40 min。印迹聚合物对锌（II）具有高选择性和特异性识别能力。Langmuir吸附模型比Freundlich或Temkin吸附模型更合适。热力学实验表明，锌（II）的吸附是一个自发的吸热过程。研究了锌（II）在印迹聚合物上的吸附机理。
