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

Int J Mol Sci. 2014 Apr 10;15(4):6111-36. doi: 10.3390/ijms15046111.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Chlorophenols / chemistry*
  • Chlorophenols / isolation & purification
  • Hydrogen-Ion Concentration
  • Kinetics
  • Molecular Imprinting*
  • Particle Size
  • Polymethacrylic Acids / chemistry*
  • Temperature
  • Thermodynamics
  • Water Pollutants, Chemical / chemistry
  • Water Pollutants, Chemical / isolation & purification
  • beta-Cyclodextrins / chemistry*

Substances

  • Chlorophenols
  • Polymethacrylic Acids
  • Water Pollutants, Chemical
  • beta-Cyclodextrins
  • polymethacrylic acid
  • betadex
  • 2,4-dichlorophenol