Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-DichlorophenolReportar como inadecuado




Molecular Imprinted Polymer of Methacrylic Acid Functionalised β-Cyclodextrin for Selective Removal of 2,4-Dichlorophenol - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia





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Abstract This work describes methacrylic acid functionalized β-cyclodextrin MAA-βCD as a novel functional monomer in the preparation of molecular imprinted polymer MIP MAA-βCD for the selective removal of 2,4-dichlorophenol 2,4-DCP. The polymer was characterized using Fourier Transform Infrared FTIR spectroscopy, Brunauer-Emmett-Teller BET and Field Emission Scanning Electron Microscopy FESEM techniques. The influence of parameters such as solution pH, contact time, temperature and initial concentrations towards removal of 2,4-DCP using MIP MAA-βCD have been evaluated. The imprinted material shows fast kinetics and the optimum pH for removal of 2,4-DCP is pH 7. Compared with the corresponding non-imprinted polymer NIP MAA-βCD, the MIP MAA-βCD exhibited higher adsorption capacity and outstanding selectivity towards 2,4-DCP. Freundlich isotherm best fitted the adsorption equilibrium data of MIP MAA-βCD and the kinetics followed a pseudo-second-order model. The calculated thermodynamic parameters showed that adsorption of 2,4-DCP was spontaneous and exothermic under the examined conditions. View Full-Text

Keywords: molecular imprinted polymer; 2,4-dichlorophenol; β-cyclodextrin; removal; kinetics; isotherm molecular imprinted polymer; 2,4-dichlorophenol; β-cyclodextrin; removal; kinetics; isotherm





Autor: Hemavathy Surikumaran, Sharifah Mohamad * and Norazilawati Muhamad Sarih

Fuente: http://mdpi.com/



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