Procion Red MX-3B-derived poly(HEMA/EGDMA) microspheres for removal of cadmium ions

DENIZLI A., Buyuktuncel E., GENC O., PISKIN E.

ANALYTICAL LETTERS, cilt.31, sa.15, ss.2791-2804, 1998 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 15
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1080/00032719808005343
  • Dergi Adı: ANALYTICAL LETTERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2791-2804
  • İnönü Üniversitesi Adresli: Hayır

Özet

Poly(hydroxyethyl methacrylate/ethylene glycol dimethacrylate) [poly(HEMA/EGDMA)]-Procion Red MX-3B microspheres were used for removal of Cd(II) ions from aqueous solutions containing different amounts of Cd(II) ions (5-60 ppm). Dye-derived microbeads carrying 8.95 mu mol Procion Red MX-3B/g polymer were used in the adsorption-desorption of Cd(II) ions. High adsorption rates were observed at the beginning of adsorption and then equilibrium was achieved in about 5-10 min. The maximum adsorption of Cd(II) ions onto the Procion Red MX-3B-derived microspheres (i.e., by chelate formation of Cd(II) ions with dye molecules) was about 4.2 mg Cd(II) ions/g polymer, which was observed at pH 7.0. While non-specific adsorption onto the underived microspheres was 0.93 mg Cd(II) ions/g polymer. More than 96% of the adsorbed Cd(II) ions was desorbed in 15 min by using 0.1 M HNO3 as an desorption agent. The regenerability of the dye-derived microspheres was also sufficient.