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

Birlik E., Ersoz A., Acikkalp E., Denizli A., Say R.

JOURNAL OF HAZARDOUS MATERIALS, vol.140, pp.110-116, 2007 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 140
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jhazmat.2006.06.141
  • Journal Name: JOURNAL OF HAZARDOUS MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.110-116
  • Keywords: molecular imprinting, chromium preconcentration, separation, SOLID-PHASE EXTRACTION, AQUEOUS-SOLUTIONS, WASTE-WATER, ADSORPTION, CHROMIUM, REMOVAL, CHROMATOGRAPHY, IONS, KINETICS, IMPRINT
  • Eskisehir Osmangazi University Affiliated: Yes

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 30 min. The maximum sorption of Cr(HI) ions onto imprinted beads was about 69.28 mg/g. Sorption studies of CO(H), 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. (c) 2006 Elsevier B.V. All rights reserved.