Equilibrium modeling for the adsorption of methylene blue from aqueous solutions on activated clay minerals |
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| Authors: | Y El Mouzdahir R Mahboub SA Korili |
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| Affiliation: | a Université Hassan II Mohammedia, Faculté des Sciences et Techniques, Laboratoire d'Electrochimie et Chimie Physique, BP 146, 20650 Mohammedia, Morocco
b Department of Applied Chemistry, Los Acebos Building, Public University of Navarra, Campus of Arrosadia, E-31006 Pamplona, Spain |
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| Abstract: | This work reports the application of an activated clay mineral as adsorbent for the removal of a basic dye, methylene blue (MB), from aqueous solutions. The thermal treatment at 300 °C for 2 h and the acid activation with nitric acid of 0.5 mol/dm3 under reflux conditions improve the adsorption capacity of the raw clay mineral. A maximum of 500 mg/g of MB at equilibrium is achieved. Equilibrium data are mathematically modelled using the Freundlich, Langmuir and Toth isotherm adsorption models. |
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| Keywords: | Acid activation Adsorption Chemical activation Clay Methylene blue |
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