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Adsorption process of fluoride from drinking water with magnetic core-shell Ce-Ti@Fe₃O₄ and Ce-Ti oxide nanoparticles
Ahmad Abo Markeb, Ahmad Mohamed (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Alonso González, Amanda (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sánchez Ferrer, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Fecha: 2017
Resumen: Synthesized magnetic core-shell Ce-Ti@FFe₃O₄ nanoparticles were tested, as an adsorbent, for fluoride removal and the adsorption studies were optimized. Adsorption capacity was compared with the synthesized Ce-Ti oxide nanoparticles. The adsorption equilibrium for the Ce-Ti@Fe₃O₄ adsorbent was found to occur in <15min and it was demonstrated to be stable and efficient in a wide pH range of 5-11 with high fluoride removal efficiency over 80% of all cases. Furthermore, isotherm data were fitted using Langmuir and Freundlich models, and the adsorption capacities resulted in 44. 37 and 91. 04mg/g, at pH7, for Ce-Ti oxides and Ce-Ti@Fe₃O₄ nanoparticles, respectively. The physical sorption mechanism was estimated using the Dubinin-Radushkevich model. An anionic exchange process between the OH- group on the surface of the Ce-Ti@Fe₃O₄ nanomaterial and the F- was involved in the adsorption. Moreover, thermodynamic parameters proved the spontaneous process for the adsorption of fluoride on Ce-Ti@Fe₃O₄ nanoparticles. The reusability of the material through magnetic recovery was demonstrated for five cycles of adsorption-desorption. Although the nanoparticles suffer slight structure modifications after their reusability, they keep their adsorption capacity. Likewise, the efficiency of the Ce-Ti@Fe₃O₄ was demonstrated when applied to real water to obtain a residual concentration of F- below the maximum contaminated level, 1. 5mg/L (WHO, 2006).
Derechos: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Lengua: Anglès.
Documento: article ; recerca ; submittedVersion
Materia: Adsorption ; Drinking water ; Fluoride removal ; Magnetic core-shell nanoparticles ; Reusability
Publicado en: Science of the total environment, Vol. 598 (Nov. 2017) , p. 949-958, ISSN 0048-9697

DOI: 10.1016/j.scitotenv.2017.04.191

38 p, 1010.6 KB

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Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ingeniería > Grupo de Investigación en Compostaje (GICOM)
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 Registro creado el 2018-10-03, última modificación el 2020-04-25

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