Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics
Inexpensive and easily available Moroccan natural clays were investigated for the removal availability of textile dyes from aqueous solution. For this purpose, the adsorption of methylene blue (MB) as reference molecule, malachite green (MG) representative of cationic dyes and methyl orange (MO) rep...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-03-01
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| Series: | Water Resources and Industry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212371714000389 |
| _version_ | 1818504868116037632 |
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| author | R. Elmoubarki F.Z. Mahjoubi H. Tounsadi J. Moustadraf M. Abdennouri A. Zouhri A. El Albani N. Barka |
| author_facet | R. Elmoubarki F.Z. Mahjoubi H. Tounsadi J. Moustadraf M. Abdennouri A. Zouhri A. El Albani N. Barka |
| author_sort | R. Elmoubarki |
| collection | DOAJ |
| description | Inexpensive and easily available Moroccan natural clays were investigated for the removal availability of textile dyes from aqueous solution. For this purpose, the adsorption of methylene blue (MB) as reference molecule, malachite green (MG) representative of cationic dyes and methyl orange (MO) representative of anionic dyes, was studied in batch mode under various parameters. The clays were characterized by means of XRD, cationic exchange capacity and BET surface area analysis. The experimental results show that, the adsorption was pH dependent with a high adsorption capacity of MB and MG in basic range and high adsorption of MO in acidic range. The pseudo-second-order kinetic model provided the best fit to the experimental data for the adsorption of MB and MG by the clays. However, the adsorption of MO was more suitable to be controlled by an intra-particle diffusion mechanism. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Dubinin–Radushkevich isotherm models. The adsorption process was found to be exothermic in nature in the case of MB and MO. However, the adsorption of MG was endothermic. |
| first_indexed | 2024-12-10T21:43:03Z |
| format | Article |
| id | doaj.art-b2ed01db27804c6c83716a30eeac9c4a |
| institution | Directory Open Access Journal |
| issn | 2212-3717 |
| language | English |
| last_indexed | 2024-12-10T21:43:03Z |
| publishDate | 2015-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Water Resources and Industry |
| spelling | doaj.art-b2ed01db27804c6c83716a30eeac9c4a2022-12-22T01:32:27ZengElsevierWater Resources and Industry2212-37172015-03-019C162910.1016/j.wri.2014.11.001Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamicsR. Elmoubarki0F.Z. Mahjoubi1H. Tounsadi2J. Moustadraf3M. Abdennouri4A. Zouhri5A. El Albani6N. Barka7Univ Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoUniv Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoUniv Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoUniv Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoUniv Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoUniv Hassan 1, Laboratoire Chimie Appliquée et Environnement, 26000 Settat, MoroccoUniversité de Poitiers UFR SFA, UMR 6269 (HydrASA) Bat. Sciences Naturelles 40, Av. du Recteur Pineau, 86022 Poitiers Cedex, FranceUniv Hassan 1, Laboratoire des Sciences des Matériaux, des Milieux et de la Modélisation (LS3M), BP.145, 25000 Khouribga, MoroccoInexpensive and easily available Moroccan natural clays were investigated for the removal availability of textile dyes from aqueous solution. For this purpose, the adsorption of methylene blue (MB) as reference molecule, malachite green (MG) representative of cationic dyes and methyl orange (MO) representative of anionic dyes, was studied in batch mode under various parameters. The clays were characterized by means of XRD, cationic exchange capacity and BET surface area analysis. The experimental results show that, the adsorption was pH dependent with a high adsorption capacity of MB and MG in basic range and high adsorption of MO in acidic range. The pseudo-second-order kinetic model provided the best fit to the experimental data for the adsorption of MB and MG by the clays. However, the adsorption of MO was more suitable to be controlled by an intra-particle diffusion mechanism. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Dubinin–Radushkevich isotherm models. The adsorption process was found to be exothermic in nature in the case of MB and MO. However, the adsorption of MG was endothermic.http://www.sciencedirect.com/science/article/pii/S2212371714000389ClaysAdsorptionTextile dyesEquilibriumThermodynamics |
| spellingShingle | R. Elmoubarki F.Z. Mahjoubi H. Tounsadi J. Moustadraf M. Abdennouri A. Zouhri A. El Albani N. Barka Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics Water Resources and Industry Clays Adsorption Textile dyes Equilibrium Thermodynamics |
| title | Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics |
| title_full | Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics |
| title_fullStr | Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics |
| title_full_unstemmed | Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics |
| title_short | Adsorption of textile dyes on raw and decanted Moroccan clays: Kinetics, equilibrium and thermodynamics |
| title_sort | adsorption of textile dyes on raw and decanted moroccan clays kinetics equilibrium and thermodynamics |
| topic | Clays Adsorption Textile dyes Equilibrium Thermodynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2212371714000389 |
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