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Adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite from aqueous solution.
J Hazard Mater. 2007 Sep 05; 148(1-2):387-94.JH

Abstract

The adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite (EP) from aqueous solution were investigated with respect to the changes in pH of solution, adsorbent dosage, contact time and temperature of solution. For the adsorption of both metal ions, the Langmuir isotherm model fitted to equilibrium data better than the Freundlich isotherm model. Using the Langmuir model equation, the monolayer adsorption capacity of EP was found to be 8.62 and 13.39 mg/g for Cu(II) and Pb(II) ions, respectively. Dubinin-Radushkevich (D-R) isotherm model was also applied to the equilibrium data and the mean free energies of adsorption were found as 10.82 kJ/mol for Cu(II) and 9.12 kJ/mol for Pb(II) indicating that the adsorption of both metal ions onto EP was taken place by chemical ion-exchange. Thermodynamic functions, the change of free energy (DeltaG degrees), enthalpy (DeltaH degrees) and entropy (DeltaS degrees) of adsorption were also calculated for each metal ions. These parameters showed that the adsorption of Cu(II) and Pb(II) ions onto EP was feasible, spontaneous and exothermic at 20-50 degrees C. Experimental data were also evaluated in terms of kinetic characteristics of adsorption and it was found that adsorption process for both metal ions followed well pseudo-second-order kinetics.

Authors+Show Affiliations

Sari A
Department of Chemistry, Gaziosmanpasa University, 60250 Tokat, Turkey. asari@gop.edu.tr
Tuzen M
No affiliation info available
Citak D
No affiliation info available
Soylak M
No affiliation info available

MeSH

AdsorptionAluminum OxideCopperKineticsLeadSilicon DioxideSolutionsThermodynamicsWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17386972

Citation

Sari, Ahmet, et al. "Adsorption Characteristics of Cu(II) and Pb(II) Onto Expanded Perlite From Aqueous Solution." Journal of Hazardous Materials, vol. 148, no. 1-2, 2007, pp. 387-94.
Sari A, Tuzen M, Citak D, et al. Adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite from aqueous solution. J Hazard Mater. 2007;148(1-2):387-94.
Sari, A., Tuzen, M., Citak, D., & Soylak, M. (2007). Adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite from aqueous solution. Journal of Hazardous Materials, 148(1-2), 387-94.
Sari A, et al. Adsorption Characteristics of Cu(II) and Pb(II) Onto Expanded Perlite From Aqueous Solution. J Hazard Mater. 2007 Sep 5;148(1-2):387-94. PubMed PMID: 17386972.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite from aqueous solution. AU - Sari,Ahmet, AU - Tuzen,Mustafa, AU - Citak,Demirhan, AU - Soylak,Mustafa, Y1 - 2007/02/24/ PY - 2007/01/17/received PY - 2007/02/19/revised PY - 2007/02/20/accepted PY - 2007/3/28/pubmed PY - 2007/12/6/medline PY - 2007/3/28/entrez SP - 387 EP - 94 JF - Journal of hazardous materials JO - J Hazard Mater VL - 148 IS - 1-2 N2 - The adsorption characteristics of Cu(II) and Pb(II) onto expanded perlite (EP) from aqueous solution were investigated with respect to the changes in pH of solution, adsorbent dosage, contact time and temperature of solution. For the adsorption of both metal ions, the Langmuir isotherm model fitted to equilibrium data better than the Freundlich isotherm model. Using the Langmuir model equation, the monolayer adsorption capacity of EP was found to be 8.62 and 13.39 mg/g for Cu(II) and Pb(II) ions, respectively. Dubinin-Radushkevich (D-R) isotherm model was also applied to the equilibrium data and the mean free energies of adsorption were found as 10.82 kJ/mol for Cu(II) and 9.12 kJ/mol for Pb(II) indicating that the adsorption of both metal ions onto EP was taken place by chemical ion-exchange. Thermodynamic functions, the change of free energy (DeltaG degrees), enthalpy (DeltaH degrees) and entropy (DeltaS degrees) of adsorption were also calculated for each metal ions. These parameters showed that the adsorption of Cu(II) and Pb(II) ions onto EP was feasible, spontaneous and exothermic at 20-50 degrees C. Experimental data were also evaluated in terms of kinetic characteristics of adsorption and it was found that adsorption process for both metal ions followed well pseudo-second-order kinetics. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17386972/Adsorption_characteristics_of_Cu_II__and_Pb_II__onto_expanded_perlite_from_aqueous_solution_ DB - PRIME DP - Unbound Medicine ER -