Magnetic Porous Polymers Prepared via High Internal Phase Emulsions for Efficient Removal of Pb2+ and Cd2+
Magnetic Porous Polymers Prepared via High Internal Phase Emulsions for Efficient Removal of Pb2+ and Cd2+
复制标题
高内相乳液制备磁性多孔聚合物可有效去除 Pb2 和 Cd2
DOI：
10.1021/acssuschemeng.7b04868
复制
发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
Xiangke Wang
中科院分区：
文献类型：
--
作者：
Hongshan Zhu;Xiaoli Tan;Liqiang Tan;Huifang Zhang;Haining Liu;Tasawar Hayat;Xiangke Wang
采用高内相乳液（HIPES）技术成功地制备了磁性多孔聚合物（MPPs）。对MPPs的微观结构、化学组成和磁性能进行了表征。以聚（苯乙烯-二乙烯基苯）为载体，以胺功能化的Fe 3 O 4纳米粒子（Fe 3 O 4-NH 2）为稳定剂，制备了具有丰富孔结构的磁性聚合物，并将其用于去除水中的Pb 2+和Cd 2+。在15 min内，磁性磁性复合材料对Pb 2+（257 mg/g）和Cd 2+（129 mg/g）的去除效果最好，磁性复合材料的磁分离能力为30.15 emu/g。结果表明，Pb 2+和Cd 2+的吸附强烈依赖于pH和离子强度，说明Pb 2+和Cd 2+的相互作用主要是外层表面络合和静电吸引。热力学参数揭示了吸附过程的自发性。
Magnetic porous polymers (MPPs) were successfully fabricated by a facile strategy of the high internal phase emulsions (HIPEs) technique. The microstructure, chemical composition, and magnetic properties of the MPPs were characterized. Impregnated with poly(styrene-divinylbenzene), stabilized by the amine-functionalized Fe3O4 nanoparticles (Fe3O4–NH2), the as-prepared MPPs with rich pore hierarchy were employed to removal Pb2+ and Cd2+ from aqueous solution. The MPPs display outstanding removal capacities toward Pb2+ (257 mg/g) and Cd2+ (129 mg/g) within 15 min, and the encapsulated Fe3O4–NH2 nanoparticles endow the MPPs with the ability of magnetic separation (30.15 emu/g). Additionally, the results indicate that the adsorptions of Pb2+ and Cd2+ are strongly dependent on pH and ionic strength, demonstrating that the interactions of Pb2+ and Cd2+ were mainly dominated by outer-sphere surface complexation and electrostatic attraction. The adsorption process is revealed by thermodynamic parameters to be spo...