Synthesis of Copper and Lead Ion Imprinted Polymer Submicron Spheres to Remove Cu2+ and Pb2+
Synthesis of Copper and Lead Ion Imprinted Polymer Submicron Spheres to Remove Cu2+ and Pb2+
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铜和铅离子印迹聚合物亚微米球的合成去除Cu2+和Pb2+
DOI：
10.1007/s10904-021-02065-3
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发表时间：
2021-07-16
影响因子：
4
通讯作者：
Li, Yi
中科院分区：
文献类型：
--
作者：
Jiang, Yang;Tang, Bolin;Li, Yi
本文以甲基丙烯酸（MAA）和4-乙烯基吡啶（4-VP）为功能单体，乙二醇双甲基丙烯酸酯（EGDMA）为交联剂，异丙醇为溶剂，采用沉淀聚合法制备了Cu（II）和Pb（II）分子印迹聚合物（IIPs）亚微米球。通过EDX光谱证实了模板离子在印迹聚合物制备过程中的存在/不存在，并通过IR、SEM和BET分析研究了颗粒的结构。从不同组分的交联剂/单体（C/M）比分析，C/M为1：3时制备IIP的最佳比例。原子吸收光谱法（AAS）表征了印迹聚合物的吸收行为。结果表明，Cu ~（2+）和Pb ~（2+）印迹聚合物的最大吸附容量分别为26.9 mg g（-1）和25.3 mg g（-1）。它们对水中的Cu ~（2+）和Pb ~（2+）分别具有良好的吸附能力和上级选择性。对Ni ~（2+）、Zn ~（2+）、Co ~（2+）和Fe ~（2+）的选择性因子（α）分别为16.5（Cu ~（2+））和12.1（Pb ~（2+））、13.8（Cu ~（2+））和16.2（Pb ~（2+））、10.8（Cu ~（2+））和10.1（Pb ~（2+））、20.4（Cu ~（2+））和20.7（Pb ~（2+））。再生实验结果表明，这两种离子交换树脂具有良好的重复利用性能，使用10次后，吸附量仍能保持在60%以上。
In this paper, Methacrylic acid (MAA) and 4-vinyl pyridine (4-VP) as functional monomers, Ethylene glycol two methyl acrylate (EGDMA) as crosslinking agent, isopropyl alcohol as the solvent, prepared the Cu(II)- and Pb(II)- imprinted polymers (IIPs) submicron spheres by precipitation polymerization. The presence/absence of the template ion in the preparation of the imprinted polymer was confirmed by EDX spectroscopy, and the structure of the particles was investigated using IR, SEM and BET analysis. From different components of crosslinker/monomer (C/M) ratio analysis, C/M at 1:3 was the optimal ratio for preparing IIPs. Atomic absorption spectroscopy (AAS) was characterized the imprinted polymers absorption behavior. The results show that the maximum adsorption capacity of Cu2+ and Pb2+ -imprinted polymer were 26.9 mg g(-1) and 25.3 mg g(-1), respectively. They also have good adsorption capacity and superior selectivity property for Cu2+ and Pb2+ in water, respectively. The selectivity factors (alpha) for Ni2+, Zn2+, Co2+ and Fe2+ were 16.5 (Cu2+) and 12.1 (Pb2+), 13.8 (Cu2+) and 16.2 (Pb2+), 10.8 (Cu2+) and 10.1 (Pb2+), 20.4 (Cu2+) and 20.7 (Pb2+), respectively. The regeneration experiment result demonstrates an excellent re-utilization property of these two type IIPs, after ten uses, the adsorption capacity can maintain above 60%.