摘要
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。
The Fe3O4 as the core of the material was modified with silicon. The magnetic metsu｜furon-methyl molecularlyim- printed polymers （MIPs） was prepared using sudace molecular imprinting technology. The magnetism of the products was characterized hy vihrating sample magnetometer （VSM）. The effect of pH value on the adsorption of MIPs was investigated. The adsorbability of Fe3O4@ SiO2-MIPs was studied via the dynamic equilibrium biding method. The results showed that the adsorption kinetics could be well described by the pseudo second-order model, which r reached to 0. 999 6, and the change of Gibb% free energy was -8.481 kJ/moL Moreover, compared with non molecularly imprinted polymer, MIPs showed higher absorption capacity and faster adsorption dynamical process. The results of specific adsorption showed that MIPs presented high selectivity adsorption to metsulfuronmethyl.
出处
《化学试剂》
CAS
CSCD
北大核心
2014年第8期686-688,718,共4页
Chemical Reagents
基金
黑龙江省教育厅资助项目(12531757)
齐齐哈尔大学校青年项目(2012k-M05)
关键词
分子印迹
磁性
甲磺隆
吸附
molecular imprinting
magnetic
metsulfuron- methyl
absorption
