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Methyl orange adsorption by modified montmorillonite nanomaterials: Characterization, kinetic, isotherms and thermodynamic studies

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Title Methyl orange adsorption by modified montmorillonite nanomaterials: Characterization, kinetic, isotherms and thermodynamic studies
 
Creator Rezala, Houria
Boukhatem, Horiya
Boudechiche, Noreddine
Romero, Amaya
 
Subject Adsorption
Isotherm models
Kinetic models
Methyl orange
Montmorillonite nanomaterials
 
Description 85-93
Clays intercalated with cetyltrimethylammonium bromide (CTAB-Mt) and hydroxyl aluminium polycation have been
prepared and analysed by X-ray fluorescence spectrometry, X-ray diffraction, fourier transform infrared spectroscopy, nitrogen
adsorption-desorption at 77 K and thermal gravimetric analysis. The adsorption capacities of modified montmorillonite
nanomaterials to remove methyl orange (MO) from aqueous solutions have been studied as a function of contact time, solution
pH, adsorbent dosage and initial MO concentration at room temperature. The maximum removal efficiency of MO has been
found in acidic medium, with 60 min equilibrium time and 1 g/L adsorbent dosage. The adsorption kinetics and isotherms have
been well fitted by pseudo-second order and Langmuir models. The montmorillonites intercalated with both
cetyltrimethylammonium bromide and hydroxyl aluminium polycation (CTAB-Al-Mt) have shown a high affinity for MO
molecules. Thermodynamic results have indicated an exothermic, spontaneous and physical adsorption process. The
characterization and adsorption performance of CTAB-Mt and CTAB-Al-Mt toward MO has also been compared with that of
the hydroxyl-aluminium pillared montmorillonite (OH-Al-Mt) and purified montmorillonite (Na-Mt).
 
Date 2023-01-27T06:50:00Z
2023-01-27T06:50:00Z
2023-01
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/61295
https://doi.org/10.56042/ijct.v30i1.65960
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJCT Vol.30(1) [January 2023]