Reactive Green HE-4BD Functionalized Supermacroporous Poly(hydroxyethyl methacrylate) Cryogel for Heavy Metal Removal

Arpa Ç., BERELİ N., OZDIL E., Bektas S., DENİZLİ A.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.118, no.4, pp.2208-2215, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 118 Issue: 4
  • Publication Date: 2010
  • Doi Number: 10.1002/app.32592
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2208-2215
  • Hacettepe University Affiliated: Yes


The aim of this study was to investigate the heavy metal adsorption performance of supermacroporous poly(hydroxyethyl methacrylate) [PHEMA] cryogel. The PHEMA cryogel was produced by cryo-polymerization. The PHEMA cryogel was characterized by scanning electron microscopy (SEM). The PHEMA cryogel containing 385 mu mol Reactive Green HE-4BD/g were used in the adsorption studies. Adsorption capacity of the PHEMA cryogel for the metal ions, i.e., Cu(2+), Cd(2+), and Pb(2+) were investigated in aqueous media containing different amounts of the ions (5-600 mg/L) and at different pH values (3.2-6.9). The maximum adsorption capacities of the PHEMA cryogel were 11.6 mg/g (56 mu mol/g) for Pb(2+), 24.5 mg/g (385 mu mol/g) for Cu(2+) and 29.1 mg/g (256 mu mol/g) for Cd(2+). The competitive adsorption capacities were 10.9 mg/g (52 mu mol/g) for Pb(2+), 22.1 mg/g for Cd(2+) (196 mu mol/g) and 23.2 mg/g (365 mu mol/g) for Cu(2+). The PHEMA/Reactive Green HE-4BD cryogel exhibited the following metal ion affinity sequence on molar basis: Cu(2+) > Cd(2+) > Pb(2+). The PHEMA/Reactive Green HE-4BD cryogel can be easily regenerated by 50 mM EDTA with higher effectiveness. These features make the PHEMA/Reactive Green HE-4BD cryogel a potential adsorbent for heavy metal removal. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 2208-2215, 2010