Synthesis and characterization of porous bentonite adsorbent and its application to remove methylene blue dye from aqueous solutions

To improve the performance of organophilic clay in water treatment, it was treated with a neutral amine and a source of silica tetraethyl orthosilicate with formula Si(OC2H5)4. The obtained materials were called PCHs (porous clay heterostructures). To allow us to better appreciate their properties,...

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Bibliographic Details
Published in:Desalination and water treatment 2022-02, Vol.249, p.271-280
Main Authors: Daas, Nihed, Zaghouane-Boudiaf, Hassina
Format: Article
Language:English
Subjects:
Batch adsorption
Dye
Kinetics
Porous adsorbent
Porous clay heterostructures
Water treatment
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Summary:To improve the performance of organophilic clay in water treatment, it was treated with a neutral amine and a source of silica tetraethyl orthosilicate with formula Si(OC2H5)4. The obtained materials were called PCHs (porous clay heterostructures). To allow us to better appreciate their properties, PCHs samples were subjected to different characterizations as Fourier-transform infrared spectroscopy, X-ray diffraction and Brunauer–Emmett–Teller analysis, then they were applied in batch reactor adsorption of the model cationic dye methylene blue (MB). The prepared PCHs adsorbents have high affinity towards MB. The most known Langmuir and Freundlich models were applied to analyze experimental isotherm data. The maximum adsorption capacity founded was of 274 and 361 mg/g for the prepared samples. The adsorption mechanism was based on the hydrophobic–hydrophobic interactions. These results are important in selecting the most effective and suitable adsorbent for cationic dyes removal from polluted environments.
ISSN:1944-3986
1944-3986
DOI:10.5004/dwt.2022.28144