Title :

Adsorption of Orange G Dye on Hydrophobic Activated Bentonite from Aqueous Solution

Author(s) :

Taibi, Zohra [Auteur]
Université des sciences et de la Technologie d'Oran Mohamed Boudiaf [Oran] [USTO MB]
Bentaleb, Kahina [Auteur]
Université des sciences et de la Technologie d'Oran Mohamed Boudiaf [Oran] [USTO MB]
Bouberka, Zohra [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Université des sciences et de la Technologie d'Oran Mohamed Boudiaf [Oran] [USTO MB]
Pierlot, Christel [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Vandewalle, Maxence [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Volkringer, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Supiot, Philippe [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Maschke, Ulrich [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207

Journal title :

Crystals

Volume number :

13

Pages :

211

Publisher :

MDPI AG

Publication date :

2023-01-24

ISSN :

2073-4352

HAL domain(s) :

Chimie/Matériaux
Chimie/Chimie organique
Chimie/Chimie inorganique

English abstract : [en]

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. ...
Show more >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 H2SO4 (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 cm3g−1), B-Act-CTAB100 (267.72 m²/g and 0.316 cm3 g−1) and B-Act-CTAB300 (111.15 m²/g and 0.171 cm3g−1), compared to B (31.79 m²/g and 0.074 cm3 g−1) and B-CTAB (3.79 m²/g and 0.034 cm3 g−1), 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).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Procédés de Recyclage et de Fonctionnalisation (PReF)
Matériaux hybrides (MATHYB)
Colloïdes catalyse oxydation (CÏSCO)

Submission date :

2023-06-26T11:18:26Z
2023-06-26T13:37:26Z