Lab of Low-Dimensional Materials Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China; School of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001, China.
Lab of Low-Dimensional Materials Chemistry, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
J Hazard Mater. 2017 Apr 15;328:160-169. doi: 10.1016/j.jhazmat.2017.01.003. Epub 2017 Jan 4.
A novel type of adsorbent for the selective recognition and adsorption of trace Pb from aqueous solutions has been successfully constructed simply by grafting molecularly imprinted polymers (MIPs) onto hollow mesoporous silica (HMS). Attractively, the HMS loaded with MIPs (H-MIPs) exhibits a fast adsorption kinetics, marked adsorption capacity of 40.52mg/g and extremely high selectivity toward Pb over Cu, Zn, Co, Mn and Ni, and the selectivity coefficients have been determined to be as high as 50. Moreover, such high adsorptive capability and selectivity were retained for at least 6 runs, indicating the stability and reusability of H-MIPs. Lead ion contaminants in real water samples were successfully concentrated and approximately 100% recovered using H-MIPs. Theoretical analysis shows that the adsorption process of H-MIPs follows the pseudo-second-order kinetic and Langmuir isotherm models. These demonstrate that H-MIPs are greatly potential for the rapid and highly efficient removal of trace Pb ions in complicated matrices.
一种新型的吸附剂，用于从水溶液中选择性识别和吸附痕量 Pb，通过简单地将分子印迹聚合物（MIPs）接枝到中空介孔硅（HMS）上成功构建。引人注目的是，负载 MIPs 的 HMS（H-MIPs）表现出快速的吸附动力学，对 Pb 的吸附容量高达 40.52mg/g，对 Cu、Zn、Co、Mn 和 Ni 具有极高的选择性，选择性系数高达 50。此外，这种高吸附能力和选择性至少可以保持 6 次循环，表明了 H-MIPs 的稳定性和可重复使用性。使用 H-MIPs 成功地浓缩和回收了实际水样中的铅离子污染物，回收率约为 100%。理论分析表明，H-MIPs 的吸附过程遵循伪二级动力学和朗缪尔等温线模型。这些表明 H-MIPs 在复杂基质中快速、高效去除痕量 Pb 离子具有很大的潜力。
