Indian Journal of Chemical Technology

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Removal of Methylene Blue Dye from Aqueous Media by Adsorption Using Nickel Oxide Modified Montmorillonite Composite


Affiliations
1 Université Djilali BOUNAAMA de Khemis-Miliana, Faculté des Sciences et de la Technologie, Route de Theniet El Had, 44225 Khemis-Miliana, Algeria
2 Laboratoire Sciences et Techniques de l'Environnement, Ecole Nationale Polytechnique d'Alger, BP 182, El Harrach, Alger, Algeria
3 Laboratoire de Génie Chimique, Département de Génie des procédés, Faculté de Technologie, Université Saad Dahleb-Blida 1, BP270-09000-Blida, Algeria
 

In this study, the adsorptive removal of methylene blue (MB) from aqueous solutions onto nickel oxide (NiO) modified montmorillonite (NiO-Mt) has been studied and compared with that of commercial bentonite. The influences of various experimental factors such as contact time, adsorbent dosage, pH of solution, initial dye concentration and temperature have been investigated. Batch adsorption studies has manifested that the maximum adsorption capacity of MB is around 99.9 mg/g in 10 min with 25 mg adsorbent mass at an initial concentration of 100 mg/L at ambient temperature of 25°C and natural pH of solution (pH = 5.8 for NiO-Mt and pH = 6.3 for commercial bentonite). The adsorption kinetics and isotherms are well fitted by pseudo-second order and Langmuir models, respectively. The thermodynamic parameters such as the changes in Gibbs free energy, enthalpy, and entropy are determined. The MB adsorption is physical, spontaneous and exothermic for both adsorbents.

Keywords

Adsorption, Isotherms, Kinetics, Methylene Blue, NiO-Mt, Thermodynamics.
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  • Removal of Methylene Blue Dye from Aqueous Media by Adsorption Using Nickel Oxide Modified Montmorillonite Composite

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Authors

H. Boukhatem
Université Djilali BOUNAAMA de Khemis-Miliana, Faculté des Sciences et de la Technologie, Route de Theniet El Had, 44225 Khemis-Miliana, Algeria
N. Ouazene
Laboratoire Sciences et Techniques de l'Environnement, Ecole Nationale Polytechnique d'Alger, BP 182, El Harrach, Alger, Algeria
H. Rezala
Université Djilali BOUNAAMA de Khemis-Miliana, Faculté des Sciences et de la Technologie, Route de Theniet El Had, 44225 Khemis-Miliana, Algeria
L. Djouadi
Laboratoire de Génie Chimique, Département de Génie des procédés, Faculté de Technologie, Université Saad Dahleb-Blida 1, BP270-09000-Blida, Algeria
S. Selami
Université Djilali BOUNAAMA de Khemis-Miliana, Faculté des Sciences et de la Technologie, Route de Theniet El Had, 44225 Khemis-Miliana, Algeria
S. Zeraif
Université Djilali BOUNAAMA de Khemis-Miliana, Faculté des Sciences et de la Technologie, Route de Theniet El Had, 44225 Khemis-Miliana, Algeria

Abstract


In this study, the adsorptive removal of methylene blue (MB) from aqueous solutions onto nickel oxide (NiO) modified montmorillonite (NiO-Mt) has been studied and compared with that of commercial bentonite. The influences of various experimental factors such as contact time, adsorbent dosage, pH of solution, initial dye concentration and temperature have been investigated. Batch adsorption studies has manifested that the maximum adsorption capacity of MB is around 99.9 mg/g in 10 min with 25 mg adsorbent mass at an initial concentration of 100 mg/L at ambient temperature of 25°C and natural pH of solution (pH = 5.8 for NiO-Mt and pH = 6.3 for commercial bentonite). The adsorption kinetics and isotherms are well fitted by pseudo-second order and Langmuir models, respectively. The thermodynamic parameters such as the changes in Gibbs free energy, enthalpy, and entropy are determined. The MB adsorption is physical, spontaneous and exothermic for both adsorbents.

Keywords


Adsorption, Isotherms, Kinetics, Methylene Blue, NiO-Mt, Thermodynamics.

References