Molecular imprinted polymer of methacrylic acid functionalised ?-cyclodextrin for selective removal of 2,4-dichlorophenol.

ABSTRACT: This work describes methacrylic acid functionalized ?-cyclodextrin (MAA-?CD) as a novel functional monomer in the preparation of molecular imprinted polymer (MIP MAA-?CD) 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-?CD 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-?CD), the MIP MAA-?CD exhibited higher adsorption capacity and outstanding selectivity towards 2,4-DCP. Freundlich isotherm best fitted the adsorption equilibrium data of MIP MAA-?CD 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.

SUBMITTER: Surikumaran H 

PROVIDER: S-EPMC4013619 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature