Ion-Imprinted PHEMA Based Monolith for the Removal of Fe3+ Ions from Aqueous Solutions


Ozkara S. , Andac M., KARAKOC V., Say R., DENİZLİ A.

JOURNAL OF APPLIED POLYMER SCIENCE, cilt.120, sa.3, ss.1829-1836, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 120 Konu: 3
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1002/app.33400
  • Dergi Adı: JOURNAL OF APPLIED POLYMER SCIENCE
  • Sayfa Sayıları: ss.1829-1836

Özet

Molecular recognition based Fe3+ imprinted monolith was prepared for selective removal of Fe3+ ions from aqueous solutions. The precomplexation was achieved by the coordination of Fe3+ ions with N-methacryloyl-(L)-cysteine methyl ester (MAC) to form the complex monomer (MAC-Fe3+). The polymerization step was then carried out in the presence of MAC-Fe3+ complex and hydroxyethyl methacrylate (HEMA) monomer by bulk polymerization to constitude a Fe3+-imprinted polymer (PHEMAC-Fe3+). The specific surface area of PHEMAC-Fe3+ monolith was found to be 35.2 m(2)/g, with a swelling ratio of 60.2% after the template was removed from the monolith by 0.1M EDTA solution. The maximum adsorption capacity of PHEMAC-Fe3+ monolith for Fe3+ ion was 0.76 mg/g. The adsorption behavior of the monolith has been successfully described by the Langmuir isotherm. It was determined that the relative selectivity of PHEMAC-Fe3+ monolith was 59.7 and 37.0 times greater than that of the nonimprinted PHEMAC monolith as compared with the Cd2+ and Ni2+ ions, respectively. The PHEMAC-Fe3+ monolith was recovered and reused many times without any significant decrease in its adsorption capacity. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 120: 1829-1836, 2011