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Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies.
J Hazard Mater. 2010 Jan 15; 173(1-3):637-46.JH

Abstract

The adsorption of Zn(2+) onto NaA and NaX zeolites was investigated. The samples were synthesized according to a hydrothermal crystallization using aluminium isopropoxide (Al[OCH(CH(3))(2)](3)) as a new alumina source. The effects of pH, initial concentration, solid/liquid ratio and temperature were studied in batch experiments. The Freundlich and the Langmuir models were applied and the adsorption equilibrium followed Langmuir adsorption isotherm. The uptake distribution coefficient (K(d)) indicated that the Zn(2+) removal was the highest at minimum concentration. Thermodynamic parameters were calculated. The negative values of standard enthalpy of adsorption revealed the exothermic nature of the adsorption process whereas the negative activation entropies reflected that no significant change occurs in the internal structure of the zeolites solid matrix during the sorption of Zn(2+). The negative values of Gibbs free energy were indicative of the spontaneity of the adsorption process. Analysis of the kinetic and rate data revealed that the pseudo second-order sorption mechanism is predominant and the intra particle diffusion was the determining step for the sorption of zinc ions. The obtained optimal parameters have been applied to wastewater from the industrial zone (Algeria) in order to remove the contained zinc effluents.

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Authors+Show Affiliations

Nibou D
Laboratoire des Sciences et Génie des Matériaux, Université des Sciences et de la Technologie Houari Boumediene, B.P. 32, El-Alia, Bab-Ezzouar, Alger, Algeria. dnibou@yahoo.fr
Mekatel H
No affiliation info available
Amokrane S
No affiliation info available
Barkat M
No affiliation info available
Trari M
No affiliation info available

MeSH

AdsorptionAlgorithmsDiffusionHydrogen-Ion ConcentrationIndicators and ReagentsKineticsMicroscopy, Electron, ScanningSpectroscopy, Fourier Transform InfraredTemperatureThermodynamicsWaste Disposal, FluidWater PurificationZeolitesZinc

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19773115

Citation

Nibou, D, et al. "Adsorption of Zn2+ Ions Onto NaA and NaX Zeolites: Kinetic, Equilibrium and Thermodynamic Studies." Journal of Hazardous Materials, vol. 173, no. 1-3, 2010, pp. 637-46.
Nibou D, Mekatel H, Amokrane S, et al. Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies. J Hazard Mater. 2010;173(1-3):637-46.
Nibou, D., Mekatel, H., Amokrane, S., Barkat, M., & Trari, M. (2010). Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies. Journal of Hazardous Materials, 173(1-3), 637-46. https://doi.org/10.1016/j.jhazmat.2009.08.132
Nibou D, et al. Adsorption of Zn2+ Ions Onto NaA and NaX Zeolites: Kinetic, Equilibrium and Thermodynamic Studies. J Hazard Mater. 2010 Jan 15;173(1-3):637-46. PubMed PMID: 19773115.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of Zn2+ ions onto NaA and NaX zeolites: kinetic, equilibrium and thermodynamic studies. AU - Nibou,D, AU - Mekatel,H, AU - Amokrane,S, AU - Barkat,M, AU - Trari,M, Y1 - 2009/09/01/ PY - 2009/06/11/received PY - 2009/08/17/revised PY - 2009/08/18/accepted PY - 2009/9/24/entrez PY - 2009/9/24/pubmed PY - 2010/2/19/medline SP - 637 EP - 46 JF - Journal of hazardous materials JO - J Hazard Mater VL - 173 IS - 1-3 N2 - The adsorption of Zn(2+) onto NaA and NaX zeolites was investigated. The samples were synthesized according to a hydrothermal crystallization using aluminium isopropoxide (Al[OCH(CH(3))(2)](3)) as a new alumina source. The effects of pH, initial concentration, solid/liquid ratio and temperature were studied in batch experiments. The Freundlich and the Langmuir models were applied and the adsorption equilibrium followed Langmuir adsorption isotherm. The uptake distribution coefficient (K(d)) indicated that the Zn(2+) removal was the highest at minimum concentration. Thermodynamic parameters were calculated. The negative values of standard enthalpy of adsorption revealed the exothermic nature of the adsorption process whereas the negative activation entropies reflected that no significant change occurs in the internal structure of the zeolites solid matrix during the sorption of Zn(2+). The negative values of Gibbs free energy were indicative of the spontaneity of the adsorption process. Analysis of the kinetic and rate data revealed that the pseudo second-order sorption mechanism is predominant and the intra particle diffusion was the determining step for the sorption of zinc ions. The obtained optimal parameters have been applied to wastewater from the industrial zone (Algeria) in order to remove the contained zinc effluents. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19773115/Adsorption_of_Zn2+_ions_onto_NaA_and_NaX_zeolites:_kinetic_equilibrium_and_thermodynamic_studies_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)01431-9 DB - PRIME DP - Unbound Medicine ER -