Appraisal of the adsorption potential of novel modified gellan gum nanocomposite for the confiscation of methylene blue and malachite green.
Autor: | Abbasi A; Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India., Ahmad I; Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India., Abd El-Gawad HH; Department of Chemistry, Faculty of Science and Arts, King Khalid University, Mohail, Assir 61421, Saudi Arabia., Alshahrani WA; Department of Chemistry, College of Science, University of Bisha, Bisha 61922, Saudi Arabia., Alqarni ND; Department of Chemistry, College of Science, University of Bisha, Bisha 61922, Saudi Arabia., El-Bahy ZM; Department of Chemistry, Al-Azhar University, Nasr City, Cairo 11884, Egypt., Ikram S; Department of Chemistry, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India. Electronic address: sikram@jmi.ac.in. |
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Jazyk: | angličtina |
Zdroj: | International journal of biological macromolecules [Int J Biol Macromol] 2024 Feb; Vol. 259 (Pt 1), pp. 129221. Date of Electronic Publication: 2024 Jan 07. |
DOI: | 10.1016/j.ijbiomac.2024.129221 |
Abstrakt: | In the present investigation a novel, environmentally affable and economical, modified gellan gum nanocomposite (MAA-g-GG/Ppy/MMT) was fabricated via free-radical polymerization for the liquid-phase mitigation of Methylene blue (MB) and Malachite green (MG) dyes. The innovation of this work is substantiated by the intentional combination of diverse materials, the strategic incorporation of polypyrrole for enhanced adsorption, and the thoughtful addition of MMT as a nanofiller to address mechanical strength and improve adsorption capacity. The physico-chemical facets of MAA-g-GG/Ppy/MMT and its interaction with the dye molecules were elucidated using FT-IR, SEM-EDX, BET, TEM, and XRD techniques. The optimum conditions for the sorption of MB and MG were deemed to be dosage (1.2 g/L for both dyes), contact time (50 min for both dyes), initial MG/MB concentration (MB = 40 mg/L & MG = 30 mg/L), and pH (MB = 10 & MG = 7). The Freundlich isotherm was identified as the most suitable model, as evidenced by the highest R 2 value (∼0.999), indicating multilayer adsorption. The pseudo second-order model appraised the kinetic data. Thermodynamic findings revealed the adsorption process to be spontaneous, viable and exothermic which was ascertained by negative ∆H ⸰ values (-22.8 kJ/mol for MB and -18.3 kJ/mol for MG). The substantial Langmuir adsorption capacity (Q Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2024 Elsevier B.V. All rights reserved.) |
Databáze: | MEDLINE |
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