磁性铅(Ⅱ)离子表面印迹聚合物的合成及吸附性能  

Synthesis of magnetic Pb(Ⅱ)-ion surface imprinted polymers and its adsorption properties

作　　者：张惠欣[1] 窦倩[1] 金秀红[2] 高前[1] 孙冬雪[1] 

机构地区：[1]河北工业大学化工学院,天津300130 [2]中海油天津化工研究设计院,天津300131

出　　处：《化学研究与应用》2014年第2期194-199,共6页Chemical Research and Application

摘　　要：采用表面离子印迹技术,以磁性Fe_3O_4@SiO_2微球为载体、Pb(Ⅱ)为模板、甲基丙烯酸和水杨醛肟为功能单体、二甲基丙烯酸乙二醇酯为交联剂,合成了磁性铅(Ⅱ)离子表而印迹聚合物,并通过对比证实了印迹聚合物对Pb(Ⅱ)的良好吸附性能和选择识别能力。当温度为277 K^286 K时,在最佳吸附pH 6.0下,可在4 h达到吸附平衡,最大吸附量为81.83 mg/g;当Pb(Ⅱ)浓度为300 mg·L^(-1),2倍的Cu(Ⅱ)、Zn(Ⅱ)或Cd(Ⅱ)与之共存时,印迹聚合物对Pb(Ⅱ)仍有较高的选择性,相对选择性系数分别为2.79、4.55和4.70。将印迹聚合物重复利用5次后,吸附量的损失约为8%。novel magnetic ion imprinted polymer was prepared by surface ion imprinting technique .The magnetic ion-imprinted polymer was prepared by using magnetic Fe 3 O4@SiO2 microsphere as supporter,Pb（Ⅱ）ion as a template,methylacrylic acid and salicylaldoxime as functional monomer ,ethylene glycol dimethacrylate as the crosslinker.The adsorption and selectivity characteris-tics were investigated.The results showed that,in comparison with non-imprinted polymer,the imprinted polymer was employed suc-cessfully.When the temperature was in a range of 277 K to 286 K,the maximum adsorption occurred at optimal pH 6.0.The equi-librium time was 4.0 h and the maximum adsorption was about 81.83 mg/g.The imprinted polymer had high selectivity and recog-nition ability toward Pb（Ⅱ）,even when the concentration of Cu （Ⅱ）,Zn（Ⅱ）or Cd（Ⅱ）was twice of Pb（Ⅱ）（300 mg？L-1 ）.The corresponding relative selectivity coefficient was 2.79,4.55 and 4.70,respectively.Reuse the imprinted polymer five times,the ad-sorption capacity was about 8%loss.

关 键 词：表面印迹 离子印迹 磁性 铅 吸附 

分 类 号：O647.3[理学—物理化学]