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镉(Ⅱ)-8-羟基喹啉分子印迹聚合物微球的合成及吸附性能研究
摘要点击 1336  全文点击 547  投稿时间:2013-10-26  修订日期:2013-12-16
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中文关键词  Cd2+  8-羟基喹啉  分子印迹聚合物微球  W/O/W乳液聚合法  形貌
英文关键词  Cd(Ⅱ) ions  8-hydroxyquinoline  imprinting polymer microspheres  W/O/W emulsions polymerization  morphology
作者单位E-mail
杨春艳 西华师范大学化学化工学院, 化学合成与污染控制四川省重点实验室, 南充 637002 yangchunyancfb@126.com 
陈复彬 西华师范大学化学化工学院, 化学合成与污染控制四川省重点实验室, 南充 637002  
赵慧 西华师范大学化学化工学院, 化学合成与污染控制四川省重点实验室, 南充 637002  
常自强 西华师范大学化学化工学院, 化学合成与污染控制四川省重点实验室, 南充 637002  
章竹君 陕西师范大学化学化工学院, 西安 710062  
中文摘要
      通过紫外光谱分析可知Cd2+与8-羟基喹啉(8-HQ)可以形成1∶1型的稳定络合物,根据此比例以Cd2+模板分子,8-羟基喹啉为配体,甲基丙烯酸(MAA)为功能单体,乙二醇二丙烯酸甲酯(EGDMA)为交联剂,偶氮二异丁腈为引发剂,通过W/O/W乳液聚合法制备了Cd2+分子印迹聚合物微球(MIP). 研究了乳化剂、致孔剂和外水相用量对印迹聚合物微球的形貌的影响,SEM结果显示在选定的条件下合成的MIP微球的粒径为1~3 μm,并且粒径较为均匀,分散性较好;对比了几种不同条件下合成的MIP对Cd2+的吸附性能;研究了溶液pH值,吸附时间,初始浓度和温度对MIP Cd2+吸附容量的影响. 实验结果表明MIP对Cd2+的吸附和解吸具有较快的传质速度,表现出较好的吸附能力,因此可考虑将该吸附剂用于废水中的Cd2+吸附与去除.
英文摘要
      Cd(Ⅱ) ion could form a stable complex with 8-hydroxyquinoline (molar rate=1:1) in ethanol solution as revealed by ultraviolet spectrum analysis. Based on this molar rate of Cd(Ⅱ) ions and 8-hydroxyquinoline, Cd(Ⅱ) ions imprinting polymer microspheres were synthesized by water-in-oil-in-water (W/O/W) emulsions polymerization, using metal Cd(Ⅱ) ions as template, 8- hydroxyquinoline as ligand, methacrylic acid as functional monomer, ethylene acrylic acid methyl ester as cross-linker, and azodiisobutyronitrile as initiator in aqueous phase. The influences of the dosage of emulsifier, porogen and outer aqueous phase on the morphology and adsorption property of MIP were studied. The morphology of MIP was characterized by SEM which showed that the diameter of MIP was of micrometer grade and the shape was homogeneous under some operating conditions. The adsorption properties of MIP synthesized under different conditions were compared. The influences of solution pH, adsorption time, initial concentration and temperature on MIP adsorbed Cd(Ⅱ) ions were assessed. The results showed that MIP showed fast kinetics for adsorption and desorption of Cd(Ⅱ) ions. It was concluded that MIP could be employed as an effective material for the selective removal of Cd(Ⅱ) ions from waste water.

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