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Equilibrium, kinetic and thermodynamic studies of adsorption of Pb(II) from aqueous solution onto Turkish kaolinite clay.
J Hazard Mater. 2007 Oct 22; 149(2):283-91.JH

Abstract

The adsorption of Pb(II) onto Turkish (Bandirma region) kaolinite clay was examined in aqueous solution with respect to the pH, adsorbent dosage, contact time, and temperature. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well. The monolayer adsorption capacity was found as 31.75 mg/g at pH 5 and 20 degrees C. Dubinin-Radushkevich (D-R) isotherm model was also applied to the equilibrium data. The mean free energy of adsorption (13.78 kJ/mol) indicated that the adsorption of Pb(II) onto kaolinite clay may be carried out via chemical ion-exchange mechanism. Thermodynamic parameters, free energy (deltaG degrees), enthalpy (deltaH degrees) and entropy (deltaS degrees) of adsorption were also calculated. These parameters showed that the adsorption of Pb(II) onto kaolinite clay was feasible, spontaneous and exothermic process in nature. Furthermore, the Lagergren-first-order, pseudo-second-order and the intraparticle diffusion models were used to describe the kinetic data. The experimental data fitted well the pseudo-second-order kinetics.

Authors+Show Affiliations

Department of Chemistry, Gaziosmanpasa University, 60250 Tokat, Turkey. asari@gop.edu.trNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17478040

Citation

Sari, Ahmet, et al. "Equilibrium, Kinetic and Thermodynamic Studies of Adsorption of Pb(II) From Aqueous Solution Onto Turkish Kaolinite Clay." Journal of Hazardous Materials, vol. 149, no. 2, 2007, pp. 283-91.
Sari A, Tuzen M, Citak D, et al. Equilibrium, kinetic and thermodynamic studies of adsorption of Pb(II) from aqueous solution onto Turkish kaolinite clay. J Hazard Mater. 2007;149(2):283-91.
Sari, A., Tuzen, M., Citak, D., & Soylak, M. (2007). Equilibrium, kinetic and thermodynamic studies of adsorption of Pb(II) from aqueous solution onto Turkish kaolinite clay. Journal of Hazardous Materials, 149(2), 283-91.
Sari A, et al. Equilibrium, Kinetic and Thermodynamic Studies of Adsorption of Pb(II) From Aqueous Solution Onto Turkish Kaolinite Clay. J Hazard Mater. 2007 Oct 22;149(2):283-91. PubMed PMID: 17478040.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Equilibrium, kinetic and thermodynamic studies of adsorption of Pb(II) from aqueous solution onto Turkish kaolinite clay. AU - Sari,Ahmet, AU - Tuzen,Mustafa, AU - Citak,Demirhan, AU - Soylak,Mustafa, Y1 - 2007/03/30/ PY - 2006/12/07/received PY - 2007/03/26/revised PY - 2007/03/26/accepted PY - 2007/5/5/pubmed PY - 2007/12/7/medline PY - 2007/5/5/entrez SP - 283 EP - 91 JF - Journal of hazardous materials JO - J Hazard Mater VL - 149 IS - 2 N2 - The adsorption of Pb(II) onto Turkish (Bandirma region) kaolinite clay was examined in aqueous solution with respect to the pH, adsorbent dosage, contact time, and temperature. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well. The monolayer adsorption capacity was found as 31.75 mg/g at pH 5 and 20 degrees C. Dubinin-Radushkevich (D-R) isotherm model was also applied to the equilibrium data. The mean free energy of adsorption (13.78 kJ/mol) indicated that the adsorption of Pb(II) onto kaolinite clay may be carried out via chemical ion-exchange mechanism. Thermodynamic parameters, free energy (deltaG degrees), enthalpy (deltaH degrees) and entropy (deltaS degrees) of adsorption were also calculated. These parameters showed that the adsorption of Pb(II) onto kaolinite clay was feasible, spontaneous and exothermic process in nature. Furthermore, the Lagergren-first-order, pseudo-second-order and the intraparticle diffusion models were used to describe the kinetic data. The experimental data fitted well the pseudo-second-order kinetics. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17478040/Equilibrium_kinetic_and_thermodynamic_studies_of_adsorption_of_Pb_II__from_aqueous_solution_onto_Turkish_kaolinite_clay_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)00444-X DB - PRIME DP - Unbound Medicine ER -