Adsorptive performance of un-calcined sodium exchanged and acid modified montmorillonite for Ni2+ removal: Equilibrium, kinetics, thermodynamics and regeneration studies

Christianah Olakitan Ijagbemi; Mi Hwa Baek; Dong Su Kim

doi:10.1016/j.jhazmat.2009.09.115

Adsorptive performance of un-calcined sodium exchanged and acid modified montmorillonite for Ni²⁺ removal: Equilibrium, kinetics, thermodynamics and regeneration studies

Christianah Olakitan Ijagbemi, Mi Hwa Baek, Dong Su Kim

Environmental Science & Engineering

Research output: Contribution to journal › Article › peer-review

74 Scopus citations

Abstract

The efficacy of un-calcined sodium exchanged (Na-MMT) and acid modified montmorillonite (A-MMT) has been investigated for adsorptive removal of Ni²⁺ from aqueous solution. Physico-chemical parameters such as pH, initial Ni²⁺ concentration, and equilibrium contact time were studied in a series of batch adsorption experiments. The equilibrium time of contact for both adsorbents was about 230 min. The Redlich-Peterson model best described the equilibrium sorption of Ni²⁺ onto Na-MMT and the Dubinin-Radushkevich model was the best model in predicting the equilibrium sorption of Ni²⁺ onto A-MMT. The kinetics of Ni²⁺ uptake by Na-MMT and A-MMT followed the pseudo second-order chemisorption mechanism. Sorptions of Ni²⁺ onto Na-MMT and A-MMT were spontaneous and endothermic. Regeneration was tried for several cycles with a view to recover the adsorbed Ni²⁺ and also to restore Na-MMT and A-MMT to their original states. The un-calcined Na-MMT and A-MMT have adsorptive potentials for removal of Ni²⁺ from aqueous bodies.

Original language	English
Pages (from-to)	746-755
Number of pages	10
Journal	Journal of Hazardous Materials
Volume	174
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jhazmat.2009.09.115
State	Published - 15 Feb 2010

Keywords

A-montmorillonite
Adsorption
Na-montmorillonite
Nickel
Regeneration

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10.1016/j.jhazmat.2009.09.115

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@article{17fc8851c5a44fff8f42be602e422fab,

title = "Adsorptive performance of un-calcined sodium exchanged and acid modified montmorillonite for Ni2+ removal: Equilibrium, kinetics, thermodynamics and regeneration studies",

abstract = "The efficacy of un-calcined sodium exchanged (Na-MMT) and acid modified montmorillonite (A-MMT) has been investigated for adsorptive removal of Ni2+ from aqueous solution. Physico-chemical parameters such as pH, initial Ni2+ concentration, and equilibrium contact time were studied in a series of batch adsorption experiments. The equilibrium time of contact for both adsorbents was about 230 min. The Redlich-Peterson model best described the equilibrium sorption of Ni2+ onto Na-MMT and the Dubinin-Radushkevich model was the best model in predicting the equilibrium sorption of Ni2+ onto A-MMT. The kinetics of Ni2+ uptake by Na-MMT and A-MMT followed the pseudo second-order chemisorption mechanism. Sorptions of Ni2+ onto Na-MMT and A-MMT were spontaneous and endothermic. Regeneration was tried for several cycles with a view to recover the adsorbed Ni2+ and also to restore Na-MMT and A-MMT to their original states. The un-calcined Na-MMT and A-MMT have adsorptive potentials for removal of Ni2+ from aqueous bodies.",

keywords = "A-montmorillonite, Adsorption, Na-montmorillonite, Nickel, Regeneration",

author = "Ijagbemi, {Christianah Olakitan} and Baek, {Mi Hwa} and Kim, {Dong Su}",

note = "Funding Information: The authors appreciate the supports of the Schlumberger Stiching Fund, the ERC program of the National Research Foundation (NRF), Korea and the Korea Institute of Geoscience and Mineral Resources (KIGAM) towards this project.",

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Adsorptive performance of un-calcined sodium exchanged and acid modified montmorillonite for Ni²⁺ removal : Equilibrium, kinetics, thermodynamics and regeneration studies. / Ijagbemi, Christianah Olakitan; Baek, Mi Hwa; Kim, Dong Su.

In: Journal of Hazardous Materials, Vol. 174, No. 1-3, 15.02.2010, p. 746-755.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Adsorptive performance of un-calcined sodium exchanged and acid modified montmorillonite for Ni2+ removal

T2 - Equilibrium, kinetics, thermodynamics and regeneration studies

AU - Ijagbemi, Christianah Olakitan

AU - Baek, Mi Hwa

AU - Kim, Dong Su

N1 - Funding Information: The authors appreciate the supports of the Schlumberger Stiching Fund, the ERC program of the National Research Foundation (NRF), Korea and the Korea Institute of Geoscience and Mineral Resources (KIGAM) towards this project.

PY - 2010/2/15

Y1 - 2010/2/15

N2 - The efficacy of un-calcined sodium exchanged (Na-MMT) and acid modified montmorillonite (A-MMT) has been investigated for adsorptive removal of Ni2+ from aqueous solution. Physico-chemical parameters such as pH, initial Ni2+ concentration, and equilibrium contact time were studied in a series of batch adsorption experiments. The equilibrium time of contact for both adsorbents was about 230 min. The Redlich-Peterson model best described the equilibrium sorption of Ni2+ onto Na-MMT and the Dubinin-Radushkevich model was the best model in predicting the equilibrium sorption of Ni2+ onto A-MMT. The kinetics of Ni2+ uptake by Na-MMT and A-MMT followed the pseudo second-order chemisorption mechanism. Sorptions of Ni2+ onto Na-MMT and A-MMT were spontaneous and endothermic. Regeneration was tried for several cycles with a view to recover the adsorbed Ni2+ and also to restore Na-MMT and A-MMT to their original states. The un-calcined Na-MMT and A-MMT have adsorptive potentials for removal of Ni2+ from aqueous bodies.

AB - The efficacy of un-calcined sodium exchanged (Na-MMT) and acid modified montmorillonite (A-MMT) has been investigated for adsorptive removal of Ni2+ from aqueous solution. Physico-chemical parameters such as pH, initial Ni2+ concentration, and equilibrium contact time were studied in a series of batch adsorption experiments. The equilibrium time of contact for both adsorbents was about 230 min. The Redlich-Peterson model best described the equilibrium sorption of Ni2+ onto Na-MMT and the Dubinin-Radushkevich model was the best model in predicting the equilibrium sorption of Ni2+ onto A-MMT. The kinetics of Ni2+ uptake by Na-MMT and A-MMT followed the pseudo second-order chemisorption mechanism. Sorptions of Ni2+ onto Na-MMT and A-MMT were spontaneous and endothermic. Regeneration was tried for several cycles with a view to recover the adsorbed Ni2+ and also to restore Na-MMT and A-MMT to their original states. The un-calcined Na-MMT and A-MMT have adsorptive potentials for removal of Ni2+ from aqueous bodies.

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