Ion imprinted polymers for the selective extraction of silver(I) ions in aqueous media: Kinetic modeling and isotherm studies

被引:48
作者
Ahamed, Meh [1 ]
Mbianda, X. Y. [1 ]
Mulaba-Barubiandi, A. F. [2 ]
Marjanovic, Ljiljana [3 ]
机构
[1] Univ Johannesburg, Fac Sci, Dept Appl Chem, Johannesburg, South Africa
[2] Univ Johannesburg, Fac Sci, Fac Engn & Built Environm, Mineral Proc & Technol Res Ctr,Dept Met, Johannesburg, South Africa
[3] Univ Johannesburg, Fac Sci, Dept Chem, Johannesburg, South Africa
关键词
Ion imprinting polymer; Selective extraction; Kinetic modeling and isotherm; Silver(I) ions; METAL-IONS; CROWN-ETHER; ADSORPTION; RECOVERY; CHITOSAN; REMOVAL; SEPARATION; RECOGNITION; RESINS; WATER;
D O I
10.1016/j.reactfunctpolym.2012.11.011
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Ion imprinted polymers (IIPs) for selective extraction of Ag(I) ions from aqueous solution were synthesized by a precipitation polymerization method using two functional monomers, 4-vinyl pyridine (4-VP) and 1-vinyl imidazole (1-VID), and N,N-ethylene bisacrylamide (EBArn) as the cross linker. Batch adsorption experiments were carried out as a function of Ag(l) imprinted polymer amount, agitation time, pH and initial Ag(I) concentration. The kinetic studies indicated that pseudo-second-order kinetic model best describes the adsorption behavior, while the adsorption data correlated well with the Langmuir isotherm. Furthermore the selectivity studies revealed that the ion imprinted polymers had a higher absorption capacity and a higher selectivity, for the Ag(I) ions, than the control polymers. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:474 / 483
页数:10
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