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Efficient Fluoride Removal from Aqueous Solution Using Zirconium-Based Composite Nanofiber Membranes

Mohamed, Alaa; Valadez Sanchez, Elvia P.; Bogdanova, Evgenia,; Bergfeldt, Britta; Mahmood, Ammar; Ostvald, Roman V.; Hashem, Tawheed

Abstract (englisch):
Herein, composite nanofiber membranes (CNMs) derived from UiO-66 and UiO-66-NH2 Zr-metal-organic frameworks (MOFs) were successfully prepared, and they exhibited high performance in adsorptive fluoride removal from aqueous media. The resultant CNMs were confirmed using different techniques, such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Brunauer–Emmett–Teller (BET) in addition to Fourier-transform infrared spectroscopy (FTIR). The parameters that govern the fluoride adsorption were evaluated, including adsorbent dose, contact time, and pH value, in addition to initial concentration. The crystalline structures of CNMs exhibited high hydrothermal stability and remained intact after fluoride adsorption. It could also be observed that the adsorbent dose has a significant effect on fluoride removal at high alkaline values. The results show that UiO-66-NH2 CNM exhibited high fluoride removal due to electrostatic interactions that strongly existed between F− and metal sites in MOF in addition to hydrogen bonds formed with MOF amino groups. The fluoride removal efficiency reached 95% under optimal conditions of 20 mg L−1, pH of 8, and 40% adsorbent dose at 60 min. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000130385
Veröffentlicht am 09.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Chemie (ITC)
Institut für Funktionelle Grenzflächen (IFG)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 20.02.2021
Sprache Englisch
Identifikator ISSN: 2077-0375
KITopen-ID: 1000130385
HGF-Programm 38.05.01 (POF IV, LK 01) Anthropogenic Carbon Cycle
Erschienen in Membranes
Verlag MDPI
Band 11
Heft 2
Seiten Article no: 147
Schlagwörter metal-organic framework; UiO-66; UiO-66-NH2; water treatment; adsorption mechanisms
Nachgewiesen in Scopus
Web of Science
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