Theoretical assessment of the adsorption mechanism of Reactive Red 141 on metal hydroxide: Water remediation via statistical physics modelling

The present research delves into the analysis of the adsorption isotherms of Reactive Red 141 (RR-141) onto metal hydroxide sludge (MHS) for potential applications in water purification. Four distinct statistical physics models were deployed in order to assure the best interpreting equilibrium data...

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Bibliographic Details
Published in:Surfaces and interfaces 2024-08, Vol.51, p.104631, Article 104631
Main Authors: Oueslati, Kods, Naifar, Amin, Al-mugren, Kholoud Saad, Aouaini, Fatma, Lamine, Abdelmottaleb Ben
Format: Article
Language:English
Subjects:
Adsorption isotherms
Aqueous effluents
Low-cost adsorbents
Metal hydroxide sludge
Reactive Red 141
Statistical physics
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Summary:The present research delves into the analysis of the adsorption isotherms of Reactive Red 141 (RR-141) onto metal hydroxide sludge (MHS) for potential applications in water purification. Four distinct statistical physics models were deployed in order to assure the best interpreting equilibrium data through considering the physicochemical interactions. Furthermore, thermodynamic properties such as Gibbs free enthalpy, entropy and internal energy were examined utilizing an appropriate model that aligned with the experimental data (monolayer with one binding site) under the grand canonical formalism. This approach provides a nanoscale viewpoint to comprehend the adsorption process. Our computations revealed that molar adsorption energies are below 40 kJ/mol, suggesting the physical nature and the exothermic tendency of the surface retention. The RR-141 entities adopted a parallel geometrical disposition to the sorption surface of MHS. Our current research is offering a fundamental strategy for enhancing RR-141 dye removal by identifying the most probable microscopic pathways for adhesion. The adsorption of (RR-141) dye onto (MHS) has been demonstrated to be significantly more effective at elevated temperatures. Consequently, we recommend that industries operate at higher temperatures during wastewater treatment processes involving RR-141. This practice will optimize the adsorption efficiency and contribute to more sustainable and effective wastewater treatment operations. [Display omitted]
ISSN:2468-0230
2468-0230
DOI:10.1016/j.surfin.2024.104631