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Cu(Ⅱ)印迹丙烯腈-co-苯乙烯微球的制备与对Cu(Ⅱ)的选择性吸附 被引量:4

Analysis of selective adsorption of Cu(Ⅱ) on Cu(Ⅱ)-imprinted acrylonitrile-co-styrene microspheres by FAAS
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摘要 以Cu(Ⅱ)为模板离子、丙烯腈为功能单体,苯乙烯(St)为骨架单体,偶氮二异丁腈为引发剂,二乙烯苯为交联剂制备了铜离子印迹丙烯腈-co-苯乙烯微球(Cu-I-AN-co-St);用UV、FTIR、SEM和FAAS表征了聚合物和分析了Cu-I-AN-co-St对Cu(Ⅱ)的选择性吸附;结果表明,在室温下溶液pH为5~6,吸附时间为60 min时吸附达到平衡,最佳吸附条件下,饱和吸附容量可达到49.1 mg/g;以1 mol/L HCl溶液作为解吸剂其解吸率可达98%;与相应非印迹微球(NI-AN-co-St)相比,Cu(Ⅱ)I-AN-co-St对Cu(II)的吸附量增大并具有选择性;与电荷相同及离子半径相近的Zn(Ⅱ)、Ni(Ⅱ)、Cd(Ⅱ)共存时,其相对选择性系数分别为28.2,24.8,44.4。 Copper ion imprinted acrylonltrlle-co-styrene (Cu-I-AN-co-St) mlcrospneres were prepareu using Cu(Ⅱ), acrylonitrile, styrene, azobisisobutyronitrile, divinylbenzene as template ions, a functional monomer, a framework monomer, an initiator, a crosslinking agent, respectively. The characterization of the imprinted polymer microsphere was carried out by UV, FTIR and SEM, and the static selective Cu(Ⅱ) time on Cu-I-AN-co-St microspheres was analyzed by was 60 min at room temperature, the maximum adsorpti Cu(Ⅱ) on of Cu FAAS. When pH of the solution was 5 -6 and adsorption adsorption capacity was 49 mg/g. 1 mol / L hydrochloric acid solution was used as a desorbent, the desorption efficiency was up to 98%. Compared to the corresponding non-imprinted polymer, the adsorption amount and selectivity of Cu(Ⅱ) on Cu(Ⅱ) I-AN-co-St microspheres increased. The relative selectivity coefficients were 28.2, 24.8, 44.4 when Cu(Ⅱ) coexisted with Zn(Ⅱ) Ni(Ⅱ), Cd(Ⅱ) which have the same charge and similar ionic radius to Cu(Ⅱ).
出处 《分析试验室》 CAS CSCD 北大核心 2013年第7期84-87,共4页 Chinese Journal of Analysis Laboratory
基金 新疆维吾尔自治区自然科学基金项目(2012211A014)资助
关键词 印迹聚合物 丙烯腈 FAAS 吸附 铜离子 Imprinted polymer AN FAAS Adsorption Copper ion
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