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Fluoride removal using a MgFe hydrotalcite and a MgFe oxide

Published online by Cambridge University Press:  26 November 2020

López-Castillo Jessica G ,
Macedo-Miranda Guadalupe ,
Martínez-Gallegos Sonia Open the ORCID record for Martínez-Gallegos Sonia [Opens in a new window] ,
Ordoñez- Regíl Eduardo ,
Álvarez-García Sonia  and
Illescas- Martínez Javier
López-Castillo Jessica G
Affiliation:
Tecnológico Nacional de México/ Instituto Tecnológico de Toluca/ División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca. Av. Tecnológico S/N Col Agrícola Bellavista, Metepec, México, C.P. 52149.
Macedo-Miranda Guadalupe
Affiliation:
Tecnológico Nacional de México/ Instituto Tecnológico de Toluca/ División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca. Av. Tecnológico S/N Col Agrícola Bellavista, Metepec, México, C.P. 52149.
Martínez-Gallegos Sonia*
Affiliation:
Tecnológico Nacional de México/ Instituto Tecnológico de Toluca/ División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca. Av. Tecnológico S/N Col Agrícola Bellavista, Metepec, México, C.P. 52149.
Ordoñez- Regíl Eduardo
Affiliation:
Instituto Nacional de Investigaciones Nucleares, Carretera México-Toluca S/N, La Marquesa, Ocoyoacac, México, C.P. 52750.
Álvarez-García Sonia
Affiliation:
Tecnológico Nacional de México/ Instituto Tecnológico de Toluca/ División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca. Av. Tecnológico S/N Col Agrícola Bellavista, Metepec, México, C.P. 52149.
Illescas- Martínez Javier
Affiliation:
Tecnológico Nacional de México/ Instituto Tecnológico de Toluca/ División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Toluca. Av. Tecnológico S/N Col Agrícola Bellavista, Metepec, México, C.P. 52149.
*
[email protected]
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Abstract

The present study investigates the adsorption of fluorides (F) by a hydrotalcite MgFe (HT MgFe) and an iron-based metal oxide (MgFe oxide). Both materials were synthesized by the coprecipitation method and were calcined at the same temperature HT MgFe, HTC MgFe, oxide MgFe and oxide MgFeC. Both solids were characterized by the XRD technique. Materials showed typical crystalline forms; in the case of HT MgFe, an octahedral crystalline form and for the oxide MgFe cubic crystalline form, the analysis of the BET method classifies the materials as mesoporous. In the adsorption study, it was determined that the optimal pH for adsorption is 7. Regarding the adsorption kinetics, the HTC MgFe and oxide MgFeC samples were adjusted to the pseudo-second order model, which describes the process as chemiadsorption; meanwhile, for the samples, isotherms were adjusted to the Langmuir model, which describes the material as homogeneous with a strong interaction between the sorbate and the sorbent.

Type
Articles
Information
MRS Advances , Volume 5 , Issue 62: International Materials Research Congress XXIX , 2020 , pp. 3239 - 3246
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Copyright
Copyright © The Author(s), 2020, published on behalf of Materials Research Society by Cambridge University Press

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