北京大学学报（自然科学版）

离子印迹聚合物的合成及其在碳酸铀酰铵溶液中的吸附性能

张红娟,陈庆德,沈兴海   

  1. 北京大学化学与分子工程学院, 放射化学与辐射化学重点学科实验室, 北京分子科学国家实验室, 北京 100871;
  • 收稿日期:2013-05-23 出版日期:2014-09-20 发布日期:2014-09-20

Synthesis of a New Ionic Imprinted Polymer for the Adsorption of Uranium from (NH4)4[UO2(CO3)3] Solution

ZHANG Hongjuan, CHEN Qingde, SHEN Xinghai   

  1. Beijing National Laboratory for Molecular Sciences, Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871;
  • Received:2013-05-23 Online:2014-09-20 Published:2014-09-20

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摘要： 以铀酰离子(UO22+)为模板, 与功能单体甲基丙烯酸-(1,3-二苯基-1,3-二羰基)-2-丙酯(DBM-MAA)、交联剂乙二醇二甲基丙烯酸酯(EGDMA)和引发剂偶氮二异丁腈(AIBN)在致孔剂1,4-二氧六环中进行聚合后, 用50 mmol/L的HCl溶液洗脱模板UO22+, 制得可用于特异性吸附UO22+的离子印迹聚合物(IIP)。当UO22+与DBM-MAA为1:3时合成的IIP吸附效果最好。此IIP能从碳酸铀酰铵溶液中竞争吸附UO22+, 最大吸附容量为9.4 mg U/g。此IIP能从含有Li+, Na+, K+和Rb+等金属离子的溶液中选择性吸附UO22+。

关键词: 印迹聚合物, 铀酰离子, 碳酸铀酰铵

Abstract: The ionic imprinted polymer (IIP) of uranyl ion (UO22+) was synthesized by the formation of binary complexes of UO22+ with 1,3-dioxo-1,3-diphenylpropan-2-yl methacrylate (DBM-MAA) as functional monomer followed by thermal copolymerization with ethylene glycol dimethacrylate (EGDMA) as cross-linking monomer in the presence of 2,2′-azobisisobutyronitrile (AIBN) as initiator and 1,4-dioxane as porogenic solvent. 50 mmol/L HCl solution was used to leach out UO22+ ions from the polymer. The IIP formed with 1:3 molar ratio of UO22+ to DBM-MAA showed better enrichment of uranyl ion from dilute aqueous solution than others and hence was chosen for detailed studies. The maximum adsorption capaci(NH4)4[UO2(CO3)3]sub>)3] solution was 9.4 mg U/g. The prepared IIP could selectively separate UO22+ from other metal ions, such as Li+, Na+, K+ and Rb+.

Key words: imprinted polymer, uranyl ion, (NH4)4[UO2(CO3)3]

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