Removal of lead (II) ions from aqueous solution by using crosslinked chitosan-clay beads

TİRTOM V. N., DİNÇER A., ÇINAR S., AYDEMİR T., Çelik A.

Desalination and Water Treatment, cilt.39, sa.1-3, ss.76-82, 2012 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 1-3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.5004/dwt.2012.2747
  • Dergi Adı: Desalination and Water Treatment
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.76-82
  • Anahtar Kelimeler: Adsorption, Atomic absorption spectrophotometer, Chitosan-clay composite beads, Heavy metal, Langmuir isotherm, Pb removal, Waste
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

Faculty of Arts and Sciences, Department of Chemistry, Celal Bayar University, 45140, Manisa Turkey Tel. +90 2362412151; Fax: +90 2362412128, +90 2362412158;A simple and effective biodegradable material known as chitosan-clay composite beads wereprepared to remove Pb(II) ions from aqueous solution. For this purpose, various importantparameters such as contact time, pH and temperature were examined on the adsorption ofPb(II) ions onto crosslinked chitosan-clay composite beads. Maximum adsorption capacity ofPb(II) was observed at pH 4.5 and 25°C and calculated as 7.93 mg/g according to Langmuirisotherm model. Thermodynamic parameters namely ΔG°, ΔH° and ΔS° of the Pb(II) adsorptionprocess have been calculated as 7.889 kJ/mol, -15.131 kJ/mol and -0.0785 kJ/molK respectively.EDTA was the best eluent for the desorption of Pb(II) ions from the crosslinked chitosan-claybeads. Scanning electron microscope (SEM) was used to characterize the surface morphologyof the crosslinked chitosan-clay beads.