Adsorption of lead(II) ions onto 8-hydroxy quinoline-immobilized bentonite

Ozcan A. S., GÖK Ö., Ozcan A.

JOURNAL OF HAZARDOUS MATERIALS, cilt.161, sa.1, ss.499-509, 2009 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 161 Sayı: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.jhazmat.2008.04.002
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.499-509
  • Anahtar Kelimeler: Bentonite, Adsorption, 8-Hydroxyl quinoline, Lead(II) ions, Immobilization, AQUEOUS-SOLUTIONS, HEAVY-METALS, ACTIVATED CARBON, CADMIUM IONS, ACID DYES, REMOVAL, BIOSORPTION, KINETICS, SORPTION, MONTMORILLONITE
  • Anadolu Üniversitesi Adresli: Evet

Özet

In this Study, the immobilization of 8-hydroxy quinoline onto bentonite was carried out and it was then used to investigate the adsorption behavior of lead(II) ions from a(aqueous solutions. The changes of the parameters of pH, contact time, initial lead(II) ions concentration and temperature were tested in the adsorption experiments. The XRD, FIR, elemental and thermal analyses were done to observe the immobilization of 8-hydroxy quinoline onto natural bentonite. The adsorption was well described by the Langmuir adsorption isotherm model at all studied temperatures. The maximum adsorption capacity was 142.94 rng g(-1) from the Langmuir isotherm model at 50 degrees C. The thermodynamic parameters implied that the adsorption process is spontaneous and endothermic, The kinetic data indicate that the adsorption fits well with the pseudo-second-order kinetic model. 8-Hydroxy quinoline-immobilized bentonite can be used as well respective adsorbent for the removal of the heavy metal pollutants according to the results. (C) 2008 Elsevier B.V. All rights reserved.