Fe3+-Imprinted Polymeric Systems

The ion-imprinting is a technique which is prepared using metal ions and binding with high crosslinking for thepreparation of adsorbents for the separation of metal ions. Ion-imprinted materials are easy to prepare, stable,inexpensive and capable of molecular recognition. The aim of this study is to prepare an ion-imprinted polymer, whichcan be used for the selective removal of Fe3+ions. Chitosan-succinate was chosen as the complexing monomer, Fe3+as template and epichlorohydrin was chosen as crosslinking agent. In the first step, chitosan was modified with succinicanhydrides and complex formation occured between carboxylic acid functional groups and Fe3+ions. Secondly, Fe3+chitosan-succinate polymer was crosslinked with epichlorohydrin. After that, the template Fe3+ions was removedusing 0.1 M HCl solution and the Fe-imprinted polymer was used in the adsorption-desorption process. Molecularcavity for the Fe3+ion was obtained in the Fe3+-imprinted polymer. The maximum adsorption capacity has found to be78.2 mg/g. Adsorption equilibrium was achieved in about 60 min. The relative selectivity coefficients of imprintedpolymers for Fe3+/Al3+and Fe3+/Mn2+were 5.13 and 4.0 times greater than non-imprinted matrix, respectively. It shouldbe noted that the Fe3+-imprinted polymer could be used many times without decreasing the adsorption capacitysignificantly

Keywords:

Ion-imprinting, Fe3+, chitosan ICP-AES, Molecular recognition,

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1. Haupt, K., Molecularly imprinted polymers in analytical chemistry. Analyst, 126 (2001) 747.
2. Haupt, K., Mosbach, K., Molecularly Imprinted Polymers and Their Use in Biomimetic Sensors Chem. Rev. 100 (2000) 2495.
3. Nishide, H., Deguchi, J., Tsuchida, E. Selective Adsorption of Metal Ions On Crosslinked Poly(Vınylpyrıdıne) Resin Prepared With A Metal Ion As A Template, Chem. Lett., 2 (1976) 169.
4. Tsukaghoshi, K.,Yu, K.Y., Maeda, M., Takagi, M. Metal Ion-Selective Adsorbent Prepared by Surface-Imprinting Polymerization, Bull. Chem. Soc. Jpn., 66 (1993) 114.
5. Garcia, R., Pinel, C., Madic, C., Lemaire, M. Ionic imprinting effect in gadolinium/lanthanum separation, Tetrahedron Lett., 39 (1998) 8651.
6. Bae, S.Y., Southard, G.L., Murray, G.M. Molecularly imprinted ion exchange resin for purification, preconcentration and determination of UO2 2+ by spectrophotometry and plasma spectrometry, Anal. Chim. Acta, 397 (1999) 173.
7. Daniel, S., Babu, P.E.J., Prasada Rao., T. Preconcentrative separation of palladium(II) using palladium(II) ion-imprinted polymer polymer formed with different quinoline derivatives and evaluation of binding parameters based on adsorption isotherm models, Talanta, 65 (2005) 441.
8. Nishide, H., Tsuchida E., Selective adsorption of metal ions on poly(4-vinylpyridine) resins in which the ligand chain is immobilized by crosslinking, Makromol. Chem., 177 (1976) 2295.
9. Yu, K.Y., Tsukaghosi, K., Maeda, M., Takagi, M. Metal Ion-Imprinted Microspheres Prepared by Reorganization of the Coordinating Groups on the Surface, Anal. Sci., 8 (1992) 701.
10. Nicholls, I.A., Rosengren, J.P. Molecular imprinting of surfaces, Bioseparation, 10 (2002) 301.
11. Zeng, X., Murray, G.M. Synthesis and Characterization of Site-Selective Ion-Exchange Resins Templated for Lead(II) Ion, Sep. Sci. Technol., 31 (1996) 2403.
12. Ersöz, A., Say, R., Denizli, A. Ni2+ ion-imprinted solid-phase extraction and preconcentration in aqueous solutions by packed-bed columns, Anal. Chim. Acta., 502 (2004) 91.
13. Panasyuk, T., Dallorto, V.C., Maraza, G., Elskaya A., Piletsky, S. Rezzano, I. Molecular Imprinted Polymers Prepared by Electropolymerization of Ni- (Protoporphyrin IX), Anal. Lett., 31(1998) 1809.
14. Daniel, S., Gladis, J.M., Prasada Rao, T. Synthesis of imprinted polymer material with palladium ion nanopores and its analytical application, Anal. Chim. Acta., 488 (2003) 173.
15. Biju, V.M., Gladis J.M., Prasada Rao, T. Ion imprinted polymer polymer: synthesis, characterization and dysprosium ion uptake properties suitable for analytical applications, Anal. Chim. Acta 478 (2003) 43-51.
16. Metilda, P., Gladis, J.M., Prasada Rao T., Influence of binary/ternary complex of imprint ion on the preconcentration of uranium(VI) using ion imprinted polymer materials, Anal. Chim. Acta, 512 (2004) 63.
17. Fang, G.Z., Tan, J., Yan, X.P., An Ion-Imprinted Functionalized Silica Gel Sorbent Prepared by a Surface Imprinting Technique Combined with a SolGel Process for Selective Solid-Phase Extraction of Cadmium(II), Anal. Chem., 77 (2005) 1734.
18. Buyuktiryaki, S., Say, R., Ersöz, A., Birlik, E., Denizli, A. Selective Preconcentration of Thorium in the Presence of UO2 2+, Ce3+ and La3+ using Th4+- imprinted Polymer, Talanta, 67 (2005) 640.
19. Rosatzin, T., Anderson, L.I., Simon, W., Mosbach, K. Preparation of Ca2+ selective sorbents by molecular imprinting using polymerisable ionophores, J. Chem. Soc. Perkin Trans., 28 (1991) 1261.
20. Dhal, P.K., F Arnold, H. Template-mediated synthesis of metal-complexing polymers for molecular recognition, J. Am. Chem. Soc., 113 (1991) 7417.
21. Aiedeh, K., Taha, M.O., Synthesis of chitosan succinate and chitosan phthalate and their evaluation as suggested matrices in orally administered colon-specific drug delivery systems, Arch. Pharm., 332 (1999) 103.
22. Yavuz, H., Say, R., Denizli A., Iron removal from human plasma based on molecular recognition using imprinted beads, Materials Science and Engineering C, 25 (2005) 521.
23. Denizli, A., Salih, B. and Pişkin, E. New sorbents for removal of heavy metal ions: diamine-glowdischarge treated poly hydroxyethylmethacrylate microspheres, J. Chromatogr. A, 773 (1997) 169.
24. Denizli, A., Salih, B. and Pişkin, E. Alkali blue 6Battached poly(EGDMA-HEMA) microbeads for removal of heavy-metal ions, React. Functl. Polym., 29 (1996) 11.
25. Dai S., Burleigh M.C., Shin Y., Morrdw C.C. and Barnes C.E., Angew. Chem. Int. Ed., 38 (1999) 1235.