1. Polymer−Clay Nanocomposite Iron Traps Based on Intersurface Ion-Imprinting.
- Author
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Muharrem Karabörk, Arzu Ersöz, Adil Denizli, and Rídvan Say
- Subjects
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POLYMERS , *IMPRINTED polymers , *SEPARATION (Technology) , *SOLUTION (Chemistry) - Abstract
We combined the ion-imprinting technique and the binding ability of Fe3ions to organosmectite to create the inorgano-organo Fe3ions imprinted polymer−nanocomposite traps with the goal of preparing a solid phase that has high selectivity for Fe3ions. In the first step, the intercalation of quartamine cations was conducted by an ion-exchange process between the smectite host and an aqueous quartamine solution and Fe3ions were complexed with methacryloylamidoantipyrine (MAAP). In the second step, quartamine cations were exchanged with a preorganized metal−chelate complex monomer for the preparation of polymer nanocomposite traps based on the intersurface ion-imprinting. After that, the template ions (i.e., Fe3) were removed using 4.0 M HNO3solution. Fe3-imprinted nanocomposites were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), swelling studies, and elemental analysis. Maximum binding capacity, optimum pH, and equilibrium binding time were found to be 78.5 mg/g, pH 3.0, and 10 min, respectively. The relative selectivity coefficients of the imprinted nanocomposite traps for Fe3/Al3, Fe3/Cu2, Fe3/Co2, and Fe3/Zn2were 5.28, 11.4, 15.8, and 72.6 times greater than the nonimprinted nanocomposites, respectively. The Fe3-imprinted nanocomposite traps could be used many times without decreasing in their adsorption capacities significantly. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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