Cr(III)-imprinted polymeric beads: Sorption and preconcentration studies

J Hazard Mater. 2007 Feb 9;140(1-2):110-6. doi: 10.1016/j.jhazmat.2006.06.141. Epub 2006 Sep 27.

Abstract

The purpose of this study is to prepare a novel molecular imprinted adsorbent to Cr(III) analysis with high selectivity. Initially, chromium (III)-methacryloylhistidine (MAH/Cr(III)) complex monomer was synthesized and then Cr(III) ion imprinted ethyleneglycoldimethacrylate-methacryloylhistidine (poly(EDMA-MAH/Cr(III))) was polymerized. Cr(III) ions were removed from the Cr(III)-imprinting polymer. Selective cavity for the chromium (III) ions was obtained in the (poly(EDMA-MAH/Cr(III))) beads. These Cr(III)-imprinted beads were used in the sorption-desorption process. The effect of initial concentration of metal, the sorption rate and the pH of the medium on sorption capacity of Cr(III)-imprinting sorbents were studied. Sorption equilibrium time was achieved in about 30min. The maximum sorption of Cr(III) ions onto imprinted beads was about 69.28mg/g. Sorption studies of Co(II), Ni(II), Cr(III) and Cr(VI) ions were also investigated using Cr(III)-imprinting polymers. The obtained results show that selectively adsorbed amount of Cr(III) ion on Cr(III)-imprinting polymers is higher than all other studied ions. When the beads were used repeatedly, their adsorption capacity was showed feasibility.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Binding Sites
  • Chromium / isolation & purification*
  • Hydrogen-Ion Concentration
  • Kinetics
  • Metals, Heavy
  • Microspheres
  • Polymers*

Substances

  • Metals, Heavy
  • Polymers
  • Chromium