Biosorption potential of the waste biomaterial obtained from Cucumis melo for the removal of Pb2+ ions from aqueous media: Equilibrium, kinetic, thermodynamic and mechanism analysis

AKAR S., Arslan S., Alp T., Arslan D., AKAR T.

CHEMICAL ENGINEERING JOURNAL, vol.185, pp.82-90, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 185
  • Publication Date: 2012
  • Doi Number: 10.1016/j.cej.2012.01.032
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.82-90
  • Keywords: Biosorption, Isotherm, Kinetic, Pb2+, Mechanism, Thermodynamic, LEAD(II) IONS, HEAVY-METALS, CU(II) IONS, ADSORPTION, BIOMASS, L., SORPTION, ISOTHERMS, CR(VI), PB(II)
  • Eskisehir Osmangazi University Affiliated: Yes


\ The potential use of a waste biosorbent material obtained from Cucumis melo (C. melo) for the removal of Pb2+ ions from aqueous solutions was investigated by considering equilibrium and kinetic aspects. The biosorption showed a pH dependent profile. An increase in biosorbent dosage up to 1.8 g L-1 caused an increase in the biosorption yield of the biosorbent. The relatively fast biosorption at all studied temperatures follows the pseudo-second-order kinetic model. Biosorption isotherm modeling shows the equilibrium data fitted to the Langmuir model with a maximum monolayer biosorption capacity of 3.64 x 10(-4) mol g(-1). The thermodynamic parameters indicated the biosorption of Pb2+ on the biomass was a spontaneous and endothermic process. Experiments conducted with multi-metal system demonstrated that the presence of co-ions slightly reduced the Pb2+ biosorption capacity of the biomass. The possible Pb2+ ion-biomaterial interactions were evaluated by the zeta potential, FTIR, SEM and EDX analysis. Results of this work showed the suggested biosorbent could be an effective and eco-friendly alternative for the removal of Pb2+ ions from contaminated solutions. (c) 2012 Elsevier B.V. All rights reserved.