Wu Yunlong, Ma Yue, Pan Jianming, Gu Runxing, Luo Jialu
School of Chemistry and Chemical Engineering, Jiangsu University Zhenjiang, China.
Front Chem. 2017 Mar 28;5:18. doi: 10.3389/fchem.2017.00018. eCollection 2017.
A novel macroporous magnetic molecularly imprinted polymer (MMIPs) of was prepared by W/O Pickering (high internal phase emulsions) HIPEs polymerization, and then it was adopted as adsorbent for selective adsorption of λ-cyhalothrin (LC). In static conditions, adsorption capacity of LC increased rapidly in the first 60 min and reached to equilibrium in ~2.0 h. Excellent conformity of the second-order model confirmed the chemical nature of the interaction between the LC and imprinted sites. The fitting adsorption isotherm was a Langmuir type, and the maximum monolayer adsorption capacity at 298 K was 404.4 μmol g. Thermodynamic parameters suggested the specific adsorption at 298 K was an exothermic, spontaneous, and entropy decreased process. Competitive recognition studies of the MMIPs were performed with diethyl phthalate (DEP) and the structurally similar compound fenvalerate (FL), and the MMIPs, which displayed high selectivity for LC.
通过W/O Pickering（高内相乳液）HIPEs聚合制备了一种新型大孔磁性分子印迹聚合物（MMIPs），然后将其用作吸附剂选择性吸附氯氟氰菊酯（LC）。在静态条件下，LC的吸附量在最初60分钟内迅速增加，并在约2.0小时达到平衡。二阶模型的良好拟合证实了LC与印迹位点之间相互作用的化学性质。拟合的吸附等温线为Langmuir型，298 K时的最大单层吸附容量为404.4 μmol g。热力学参数表明，298 K时的特异性吸附是一个放热、自发且熵减小的过程。用邻苯二甲酸二乙酯（DEP）和结构相似的化合物氰戊菊酯（FL）对MMIPs进行了竞争性识别研究，MMIPs对LC表现出高选择性。
