Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution
This report focusses on the modification of physical structure and chemical properties of a bentonite clay from the Hammam Boughrara region of the Maghnia district in western Algeria to maximize its adsorption capacity. The purified bentonite clay (called B) was modified, either by acid activation w...
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MDPI AG
2023-01-01
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| author | Zohra Taibi Kahina Bentaleb Zohra Bouberka Christel Pierlot Maxence Vandewalle Christophe Volkringer Philippe Supiot Ulrich Maschke |
| author_facet | Zohra Taibi Kahina Bentaleb Zohra Bouberka Christel Pierlot Maxence Vandewalle Christophe Volkringer Philippe Supiot Ulrich Maschke |
| author_sort | Zohra Taibi |
| collection | DOAJ |
| description | This report focusses on the modification of physical structure and chemical properties of a bentonite clay from the Hammam Boughrara region of the Maghnia district in western Algeria to maximize its adsorption capacity. The purified bentonite clay (called B) was modified, either by acid activation with 1M sulfuric acid (B-Act), or by intercalation with the cationic surfactant cetytrimethyl ammonium bromide (CTAB), applying a cation exchange capacity (CEC) of 100% (called B-CTAB). Modification of B was also introduced by combining these two steps consecutively, i.e., at first acid activation of B, followed by intercalation with CTAB (B-Act-CTAB). The B-Act-CTAB was obtained by H<sub>2</sub>SO<sub>4</sub> (1M) acid activation, followed by co-adsorption of CTAB with 100% and 300% of the CEC of B-Act as precursor. In particular, a strong increase of surface area and pore volume of the modified bentonites was observed for B-Act (469.83 m²/g and 0.401 cm<sup>3</sup>g<sup>−1</sup>), B-Act-CTAB100 (267.72 m²/g and 0.316 cm<sup>3</sup> g<sup>−1</sup>) and B-Act-CTAB300 (111.15 m²/g and 0.171 cm<sup>3</sup>g<sup>−1</sup>), compared to B (31.79 m²/g and 0.074 cm<sup>3</sup> g<sup>−1</sup>) and B-CTAB (3.79 m²/g and 0.034 cm<sup>3</sup> g<sup>−1</sup>), respectively. The bentonite-based adsorbents were then used to evaluate the removal efficiency of an organic molecule, the azo dye Orange G (OG), as a model for a Persistent Organic Pollutant. Freundlich, Langmuir and Sips (Langmuir–Freundlich) models were applied to analyze equilibrium isotherms, showing a good correlation between experimental data and the Freundlich model. A good agreement was obtained between experimentally obtained kinetic adsorption data and the pseudo-second-order model, allowing to evaluate rate constants. B-Act-CTAB300 can be applied as a low-cost material for removal of azo dyes, since its adsorption capacity towards OG (102.80 mg/g) exceeds largely that of B-CTAB (31.49 mg/g) and B-Act-CTAB100 (12.77 mg/g). |
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| spelling | doaj.art-ad8de5a49b40417c82c71f23f2a26e772023-11-16T19:55:00ZengMDPI AGCrystals2073-43522023-01-0113221110.3390/cryst13020211Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous SolutionZohra Taibi0Kahina Bentaleb1Zohra Bouberka2Christel Pierlot3Maxence Vandewalle4Christophe Volkringer5Philippe Supiot6Ulrich Maschke7Laboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, AlgeriaLaboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, AlgeriaLaboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, AlgeriaUnité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université de Lille, CNRS, Centrale Lille, F-59000 Lille, FranceUnité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université de Lille, CNRS, Centrale Lille, F-59000 Lille, FranceUnité de Catalyse et Chimie du Solide (UCCS), UMR 8181, Université de Lille, CNRS, Centrale Lille, F-59000 Lille, FranceLaboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, AlgeriaLaboratoire Physico-Chimie des Matériaux-Catalyse et Environnement (LPCMCE), Université des Sciences et de la Technologie d’Oran Mohamed Boudiaf (USTOMB), BP 1505, El M’naouer, Oran 31000, AlgeriaThis report focusses on the modification of physical structure and chemical properties of a bentonite clay from the Hammam Boughrara region of the Maghnia district in western Algeria to maximize its adsorption capacity. The purified bentonite clay (called B) was modified, either by acid activation with 1M sulfuric acid (B-Act), or by intercalation with the cationic surfactant cetytrimethyl ammonium bromide (CTAB), applying a cation exchange capacity (CEC) of 100% (called B-CTAB). Modification of B was also introduced by combining these two steps consecutively, i.e., at first acid activation of B, followed by intercalation with CTAB (B-Act-CTAB). The B-Act-CTAB was obtained by H<sub>2</sub>SO<sub>4</sub> (1M) acid activation, followed by co-adsorption of CTAB with 100% and 300% of the CEC of B-Act as precursor. In particular, a strong increase of surface area and pore volume of the modified bentonites was observed for B-Act (469.83 m²/g and 0.401 cm<sup>3</sup>g<sup>−1</sup>), B-Act-CTAB100 (267.72 m²/g and 0.316 cm<sup>3</sup> g<sup>−1</sup>) and B-Act-CTAB300 (111.15 m²/g and 0.171 cm<sup>3</sup>g<sup>−1</sup>), compared to B (31.79 m²/g and 0.074 cm<sup>3</sup> g<sup>−1</sup>) and B-CTAB (3.79 m²/g and 0.034 cm<sup>3</sup> g<sup>−1</sup>), respectively. The bentonite-based adsorbents were then used to evaluate the removal efficiency of an organic molecule, the azo dye Orange G (OG), as a model for a Persistent Organic Pollutant. Freundlich, Langmuir and Sips (Langmuir–Freundlich) models were applied to analyze equilibrium isotherms, showing a good correlation between experimental data and the Freundlich model. A good agreement was obtained between experimentally obtained kinetic adsorption data and the pseudo-second-order model, allowing to evaluate rate constants. B-Act-CTAB300 can be applied as a low-cost material for removal of azo dyes, since its adsorption capacity towards OG (102.80 mg/g) exceeds largely that of B-CTAB (31.49 mg/g) and B-Act-CTAB100 (12.77 mg/g).https://www.mdpi.com/2073-4352/13/2/211adsorptionactivated bentoniteorganophilic-activated bentoniteCTABOrange G |
| spellingShingle | Zohra Taibi Kahina Bentaleb Zohra Bouberka Christel Pierlot Maxence Vandewalle Christophe Volkringer Philippe Supiot Ulrich Maschke Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution Crystals adsorption activated bentonite organophilic-activated bentonite CTAB Orange G |
| title | Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution |
| title_full | Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution |
| title_fullStr | Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution |
| title_full_unstemmed | Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution |
| title_short | Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution |
| title_sort | adsorption of orange g dye on hydrophobic activated bentonite from aqueous solution |
| topic | adsorption activated bentonite organophilic-activated bentonite CTAB Orange G |
| url | https://www.mdpi.com/2073-4352/13/2/211 |
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