Adsorption of Pb(II) and Cr(III) from aqueous solution on Celtek clay

Sari A., TÜZEN M., Soylak M.

JOURNAL OF HAZARDOUS MATERIALS, cilt.144, ss.41-46, 2007 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 144
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1016/j.jhazmat.2006.09.080
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.41-46
  • Anahtar Kelimeler: lead, chromium, Celtek clay, adsorption isotherm, thermodynamic parameter, ACTIVATED CARBON, IONS, REMOVAL, SORPTION, CADMIUM, CU(II), CD(II), CR(VI), ZN(II), ZINC
  • Erciyes Üniversitesi Adresli: Evet

Özet

This paper presents the adsorption of Pb(Il) and Cr(III) from aqueous solution on Celtek clay. Batch experiments were carried out as a function of the adsorbent dosage, solution pH, shaking time, and temperature. The equilibrium data of fitted well with the linear Langmuir and Freundlich models. Dubinin-Radushkevick (D-R) isotherm model was applied to describe the nature of the adsorption of the metals, and found that it occurred physically. Thermodynamic parameters, the change in Gibbs free energy change (Delta G degrees), enthalpy (Delta H degrees) and entropy (Delta S degrees) were also calculated. These parameters indicated that the adsorptionof Pb(II) andCr(III) on Celtek clay was feasible, spontaneous and exothermic process in nature. Based on the results, it was concluded that Celtek clay had a significant potential for removing Pb(II) and Cr(III) from wastewater using adsorption method. (C) 2006 Elsevier B.V. All rights reserved.