Ion imprinted polymers for the selective extraction of silver(I) ions in aqueous media: Kinetic modeling and isotherm studies |
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| Authors: | MEH Ahamed XY Mbianda AF Mulaba-Bafubiandi Ljiljana Marjanovic |
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| Affiliation: | 1. Department of Applied Chemistry (Doornfontein Campus), Faculty of Science, University of Johannesburg, South Africa;2. Mineral Processing and Technology Research Center, Department of Metallurgy, Faculty of Engineering and the Built Environment, Faculty of Science, University of Johannesburg, South Africa;3. Department of Chemistry, Faculty of Science, University of Johannesburg, South Africa |
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| Abstract: | 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. |
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