Ion imprinted cryogels for selective removal of Ni(II) ions from aqueous solutions

Tamahkar E., Bakhshpour M., ANDAÇ A. M., DENİZLİ A.

SEPARATION AND PURIFICATION TECHNOLOGY, vol.179, pp.36-44, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 179
  • Publication Date: 2017
  • Doi Number: 10.1016/j.seppur.2016.12.048
  • Journal Name: SEPARATION AND PURIFICATION TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.36-44
  • Keywords: Ion imprinting, Cryogels, Nickel ions, SOLID-PHASE EXTRACTION, HEAVY-METAL IONS, NICKEL CARCINOGENESIS, POLYMER PARTICLES, URANYL-ION, RECOGNITION, BEADS, BINDING, CHROMATOGRAPHY, ADSORPTION
  • Bursa Uludag University Affiliated: No

Abstract

In this article, ion imprinted poly(hydroxyethyl methacrylate) (PHEMA) based supermacroporous cryogels were synthesized in the presence of a functional monomer, namely N-methacryloyl-histidine methyl ester (MAH), to be complexed with Ni(II) ions. Two types of cryogels (MIP1 and MIP2) were synthesized according to functional monomer/template [MAH/Ni(II)] complexing molar ratios. These cryogels were then characterized by swelling tests, FT-IR and SEM measurements and used for selective binding of Ni(II) ions from aqueous solutions and a certified material. The maximum adsorption capacities of MIP1 and MIP2 cryogels were found as 1.89 and 5.54 mg/g, respectively. Ni(II) imprinted cryogels exhibited excellent selectivity toward competitive metal ions [Fe(III), Cu(II) and Zn(II)] indicating important potential for selective removal of Ni(II) ions from aqueous solutions. In addition, Ni(II) imprinted cryogels were used repeatedly without a decrement in the binding capacity. (C) 2016 Elsevier B.V. All rights reserved.