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以四氧化三铁为内核,在其表面包覆二氧化硅,采用表面印迹技术制备了磁性甲磺隆分子印迹聚合物(MIPs)。采用磁强计(VSM)对产物的磁性进行了表征。研究了溶液pH对印迹聚合物吸附容量的影响。通过动态平衡结合法研究了分子印迹聚合物的吸附能力。结果表明,准二级动力学模型很好地拟合了吸附动力学,相关系数r达到0.999 6,吉布斯自由能变化值为-8.481 kJ/mol。与非分子印迹聚合物相比,制备的MIPs表现出高吸附容量和快速的吸附动力学。特异性吸附实验表明分子印迹聚合物对甲磺隆具有高选择性吸附。
With ferroferric oxide as the core, SiO2 was coated on its surface and MESs were prepared by surface imprinting technique. The magnetism of the product was characterized by magnetometer (VSM). The effect of solution pH on the adsorption capacity of imprinted polymers was investigated. The adsorption capacity of molecularly imprinted polymers was studied by dynamic equilibrium binding method. The results showed that the quasi-second-order kinetic model fit well to the adsorption kinetics, with a correlation coefficient r of 0.999 6 and Gibbs free energy of -8.481 kJ / mol. Compared with the non-molecularly imprinted polymer, MIPs prepared showed high adsorption capacity and fast adsorption kinetics. Specific adsorption experiments show that the molecularly imprinted polymer has high selective adsorption to metsulfuron-methyl.