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

• Published in: Reactive & functional polymers Vol. 73; no. 3; pp. 474 - 483
• Main Authors: Ahamed, MEH, Mbianda, X.Y., Mulaba-Bafubiandi, A.F., Marjanovic, Ljiljana
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.03.2013; Elsevier
• Subjects: Adsorbents; Adsorption; Applied sciences; Chemistry; Exact sciences and technology; Extraction; General and physical chemistry; Imprinted polymers; Ion imprinting polymer; Isotherms; Kinetic modeling and isotherm; Mathematical models; Organic polymers; Physicochemistry of polymers; Polymerization; Polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Selective extraction; Selectivity; Silver(I) ions; Surface physical chemistry; Selective extraction; Ion imprinting polymer; Kinetic modeling and isotherm; Silver(I) ions; Liquid solid adsorption; Adsorption isotherm; Metal ion; Organic adsorbent; Free radical polymerization; Aqueous medium; Template polymerization; Morphology; Preparation; Crosslinked polymer; Imidazole(vinyl) polymer; pH; Electrokinetic potential; Silver ion; Kinetics; Pyridine(4-vinyl) polymer; Comparative study
• ISSN: 1381-5148
• DOI: 10.1016/j.reactfunctpolym.2012.11.011

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 (EBAm) as the cross linker. Batch adsorption experiments were carried out as a function of Ag(I) 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.