Sustainable gliadin - Metal oxide composites for efficient inactivation of Escherichia coli and remediation of cobalt (II) from water.

Autor: Massima Mouele ES; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland; Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, 7535, South Africa. Electronic address: emilemassima@yahoo.fr., Bediako JK; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland; Department of Food Process Engineering, School of Engineering Sciences, College of Basic and Applied Sciences, University of Ghana, P. O. Box LG 77, Legon, Accra, Ghana. Electronic address: john.bediako@lut.fi., El Ouardi Y; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland., Anugwom I; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland., Butylina S; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland., Mukaba JL; Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, 7535, South Africa., Petrik LF; Environmental and Nano Sciences Group, Department of Chemistry, University of the Western Cape, Bellville, 7535, South Africa., Zar Myint MT; Department of Physics, College of Science, Sultan Qaboos University, P. O. Box 36, 123 Al-Khoud, Muscat, 123, Oman., Kyaw HH; Nanotechnology Research Center, Sultan Qaboos University, P. O. Box 33, Al-Khoud, Muscat, 123, Oman., Al-Abri M; Nanotechnology Research Center, Sultan Qaboos University, P. O. Box 33, Al-Khoud, Muscat, 123, Oman., Al Belushi MA; Central Laboratory for Food Safety, Food Safety and Quality Center, Ministry of Agriculture, Fisheries Wealth & Water Resources, PO Box 3094, Airport Central Post, 111, Muscat, Oman., Dobretsov S; Central Laboratory for Food Safety, Food Safety and Quality Center, Ministry of Agriculture, Fisheries Wealth & Water Resources, PO Box 3094, Airport Central Post, 111, Muscat, Oman., Laatikainen K; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland., Repo E; Department of Separation Science, School of Engineering Science, Lappeenranta-Lahti University of Technology (LUT), FI-53850, Lappeenranta, Finland.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2024 Jan 01; Vol. 340 (Pt 2), pp. 122788. Date of Electronic Publication: 2023 Oct 23.
DOI: 10.1016/j.envpol.2023.122788
Abstrakt: Bio-based materials facilitate greener approach to engineering novel materials with multifunctional properties for various applications including water treatment. In this study, we extracted gliadin from wheat gluten using alcoholic solvent. The aggregation limitations of gliadin protein were overcome by functionalisation with metal oxides (MOs) TiO 2 , AgFe 2 O 3 and AgFe-TiO 2 prepared by chemical precipitations. The novel composites were characterised by scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Fourier-transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), thermogravimetry analysis (TGA), Brunauer Emmet-Teller (BET), and zeta potential. The multifunctionality of MOs-gliadin composites was tested through toxic Escherichia coli (E. coli) inactivation and Co 2+ adsorption from water. The antibacterial results showed excellent inhibition under both dark and light conditions. The maximum Co 2+ uptake, 101 mg/g was reached with TiO 2 @gliadin after 24 h and best fitted the Langmuir isotherm model. The adsorption process followed pseudo-second order model with an equilibrium adsorption capacity, q e2 = 89.86 mg/g closer to the experimental data. Thermodynamic investigations indicated that ΔG ° =-9.677kJ/mol,ΔH°=-123kJ/mol,and ΔS°=0.490J.K/mol, respectively, suggesting that adsorption was spontaneous and endothermic. The regenerated TiO 2 @gliadin composite was still efficient after five consecutive cycles. This study demonstrates that MOs-gliadin blended composites are sustainable for water purification.
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 © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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