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Article

Sorption of Fluoride and Bacterial Disinfection Property of Biosynthesized Nanofibrous Cellulose Decorated Ag–MgO–Nanohydroxyapatite Composite for Household Water Treatment

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Environmental Remediation and Nano Sciences (EnviReN), Department of Geography and Environmental Sciences, Faculty of Science, Engineering and Agriculture, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa
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School of Chemistry and Material Sciences, Technical University of Kenya, Haile Selassie Avenue, P.O. Box 52428, Nairobi 00200, Kenya
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Engineering Systems and Environmet, School of Engineering and Applied Sciences, University of Virginia, P.O. Box 400747, Charlottesville, VA 22904, USA
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Molecular Parasitology and Opportunistic Infections Program, Department of Biochemistry and Microbiology, Faculty of Science, Engineering, and Agriculture, University of Venda, Private Bag X5050, Thohoyandou 0950, South Africa
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Author to whom correspondence should be addressed.
Academic Editors: John Vakros, Evroula Hapeshi, Catia Cannilla and Giuseppe Bonura
Polymers 2022, 14(5), 890; https://doi.org/10.3390/polym14050890
Received: 21 December 2021 / Revised: 7 February 2022 / Accepted: 8 February 2022 / Published: 23 February 2022
An innovative and sustainable approach to integrating modified Ag–MgO–nanohydroxyapatite on a nanofibrous cellulose template (CNF-AgMgOnHaP) as a multifunctional adsorbent via a hydrothermal bioreduction route using Citrus paradisi peel extract was developed and examined. The surface morphology and mineralogical properties of CNF-AgMgOnHaP by UV–vis spectroscopy, SEM-EDS, XRD, FTIR, TEM, and BET techniques are reported. Batch fluoride sorption studies and its disinfection potential against common bacteria in surface water were evaluated. The results showed the successful synthesis of a modified multistructural CNF-AgMgOnHaP composite with an improved BET surface area of 160.17 m2/g. The sorption of fluoride by the adsorbent was found to strongly depend on the different sorption conditions with a maximum F sorption capacity of 8.71 mg/g at 303 K, and pH of 5 with 0.25 g dosage at 10 min contact time (25 ± 3 °C). Equilibrium fluoride sorption onto the CNF-AgMgOnHaP was best described by the Freundlich isotherm model across all the operating temperatures. The overall kinetic results showed that the adsorption mechanisms not only depend on using the pseudo-second-order process but are also governed by the mass transfer of the adsorbate molecules from the external surface onto the pores of the adsorbent. The thermodynamic parameters revealed that the adsorption process of F onto CNF-AgMgOnHaP was endothermic and spontaneous at the sorbent/solution interface. The synthesized composite also provides some antibacterial activity against common infectious microbes from contaminated drinking water. The overall results suggested that the CNF-AgMgOnHaP nanocomposite possesses the potential for the simultaneous decontamination of pollutants and microbes in drinking water. View Full-Text
Keywords: bioreduction; core–shell nanocomposite; cellulose nanocomposite; water purification bioreduction; core–shell nanocomposite; cellulose nanocomposite; water purification
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MDPI and ACS Style

Ayinde, W.B.; Gitari, M.W.; Smith, J.A.; Samie, A. Sorption of Fluoride and Bacterial Disinfection Property of Biosynthesized Nanofibrous Cellulose Decorated Ag–MgO–Nanohydroxyapatite Composite for Household Water Treatment. Polymers 2022, 14, 890. https://doi.org/10.3390/polym14050890

AMA Style

Ayinde WB, Gitari MW, Smith JA, Samie A. Sorption of Fluoride and Bacterial Disinfection Property of Biosynthesized Nanofibrous Cellulose Decorated Ag–MgO–Nanohydroxyapatite Composite for Household Water Treatment. Polymers. 2022; 14(5):890. https://doi.org/10.3390/polym14050890

Chicago/Turabian Style

Ayinde, Wasiu B., Mugera W. Gitari, James A. Smith, and Amidou Samie. 2022. "Sorption of Fluoride and Bacterial Disinfection Property of Biosynthesized Nanofibrous Cellulose Decorated Ag–MgO–Nanohydroxyapatite Composite for Household Water Treatment" Polymers 14, no. 5: 890. https://doi.org/10.3390/polym14050890

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