Magnetic Fe/Fe3C@C nanoadsorbents for efficient Cr (VI) removal

Cervera Gabalda, Laura María; Gómez Polo, Cristina

Magnetic Fe/Fe3C@C nanoadsorbents for efficient Cr (VI) removal

dc.contributor.author	Cervera Gabalda, Laura María
dc.contributor.author	Gómez Polo, Cristina
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Advanced Materials and Mathematics - INAMAT2	en
dc.date.accessioned	2023-03-31T12:04:14Z
dc.date.available	2023-03-31T12:04:14Z
dc.date.issued	2022
dc.date.updated	2023-03-31T11:51:45Z
dc.description.abstract	Magnetic carbon nanocomposites (α-Fe/Fe3C@C) synthesized employing fructose and Fe3O4 magnetite nanoparticles as the carbon and iron precursors, respectively, are analyzed and applied for the removal of Cr (VI). Initial citric acid-coated magnetite nanoparticles, obtained through the co-precipitation method, were mixed with fructose (weight ratio 1:2) and thermally treated at different annealing temperatures (Tann = 400, 600, 800, and 1000 ◦C). The thermal decomposition of the carbon matrix and the Fe3O4 reduction was followed by thermogravimetry (TGA) and Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction, Raman spectroscopy, SQUID magnetometry, and N2 adsorption–desorption isotherms. A high annealing temperature (Tann = 800 ◦C) leads to optimum magnetic adsorbents (high magnetization enabling the magnetic separation of the adsorbent from the aqueous media and large specific surface area to enhance the pollutant adsorption process). Cr (VI) adsorption tests, performed under weak acid environments (pH = 6) and low pollutant concentrations (1 mg/L), confirm the Cr removal ability and reusability after consecutive adsorption cycles. Physical adsorption (pseudo-first-order kinetics model) and multilayer adsorption (Freundlich isotherm model) characterize the Cr (VI) absorption phenomena and support the enhanced adsorption capability of the synthesized nanostructures.	en
dc.description.sponsorship	The research was funded by MCIN/AEI/10.13039/501100011033, grant PID2020-116321RB-C21 and Navarra Government, Departamento de Universidad Innovación y Transformación Digital, project PC162-163 T3CE.	en
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/zip	en
dc.identifier.citation	Cervera-Gabalda, L., & Gómez-Polo, C. (2022). Magnetic Fe/Fe3C@C Nanoadsorbents for Efficient Cr (VI) Removal. International Journal of Molecular Sciences, 23(23), 15135. https://doi.org/10.3390/ijms232315135	en
dc.identifier.doi	10.3390/ijms232315135
dc.identifier.issn	1661-6596
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/45003
dc.language.iso	eng	en
dc.publisher	MDPI	en
dc.relation.ispartof	International Journal of Molecular Sciences 2022, 23, 15135	en
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116321RB-C21/ES/
dc.relation.projectID	info:eu-repo/grantAgreement/Gobierno de Navarra//PC162-163 T3CE/
dc.relation.publisherversion	https://doi.org/10.3390/ijms232315135
dc.rights	© 2022 by the authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Adsorption	en
dc.subject	Chromium	en
dc.subject	Magnetic nanocomposite	en
dc.subject	Thermal decomposition	en
dc.title	Magnetic Fe/Fe3C@C nanoadsorbents for efficient Cr (VI) removal	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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