Performance of magnesium oxide-coated bentonite in removal process of copper ions from aqueous solution

EREN E., Tabak A., EREN B.

Desalination, vol.257, no.1-3, pp.163-169, 2010 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 257 Issue: 1-3
  • Publication Date: 2010
  • Doi Number: 10.1016/j.desal.2010.02.028
  • Journal Name: Desalination
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.163-169
  • Keywords: Adsorption, Bentonite, Clay, Cu(II), Thermodynamic
  • Bilecik Şeyh Edebali University Affiliated: Yes

Abstract

This paper presents the adsorption of Cu(II) ions from aqueous solution on modified Unye bentonite. Adsorption of Cu(II) ions by magnesium oxide-coated bentonite (MCB) sample was investigated as a function of the initial Cu(II) concentration, solution pH, ionic strength, temperature and inorganic ligands (Cl-, SO42-, and HPO42-). Changes in the surfaces and structure were characterized by means of XRD and N2 gas adsorption data. The Langmuir monolayer adsorption capacity of MCB in 0.1 M KNO3 solution was estimated as 58.44 mg/g. ΔG, ΔH and ΔS values were evaluated for MCB to be -9.50 kJ/mol (at 303 K), 43.81 kJ/mol and 175.85 J/mol K. © 2010 Elsevier B.V. All rights reserved.