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Volume 10
Issue 6
10.3390/met10060765
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Article

Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions

by
Francisco J. Alguacil
,
Irene García-Díaz
,
Esther Escudero Baquero
,
Olga Rodríguez Largo
and
Félix A. López
*
National Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Metals 2020, 10(6), 765; https://doi.org/10.3390/met10060765
Submission received: 18 May 2020 / Revised: 4 June 2020 / Accepted: 6 June 2020 / Published: 8 June 2020
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Abstract

The behavior of oxidized and non-oxidized multiwalled carbon nanotubes (MWCNTs) in the adsorption of lanthanum(III) from aqueous solutions is described. Metal uptake is studied as a function of several variables such as the stirring speed of the system, pH of the aqueous solution and metal and nanomaterial concentrations. The experimental results are fitted to various kinetic and isotherm models, the rate law being fitted to the film diffusion and particle diffusion models, when the non-oxidized and the oxidized nanomaterials are used to remove lanthanum from the solution, respectively. Sulfuric acid solutions seem to be appropriate to recover the metal from La-loaded nanomaterials.
Keywords: lanthanum; multiwalled carbon nanotubes; adsorption; recovery lanthanum; multiwalled carbon nanotubes; adsorption; recovery

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MDPI and ACS Style

Alguacil, F.J.; García-Díaz, I.; Escudero Baquero, E.; Rodríguez Largo, O.; López, F.A. Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions. Metals 2020, 10, 765. https://doi.org/10.3390/met10060765

AMA Style

Alguacil FJ, García-Díaz I, Escudero Baquero E, Rodríguez Largo O, López FA. Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions. Metals. 2020; 10(6):765. https://doi.org/10.3390/met10060765

Chicago/Turabian Style

Alguacil, Francisco J., Irene García-Díaz, Esther Escudero Baquero, Olga Rodríguez Largo, and Félix A. López. 2020. "Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions" Metals 10, no. 6: 765. https://doi.org/10.3390/met10060765

APA Style

Alguacil, F. J., García-Díaz, I., Escudero Baquero, E., Rodríguez Largo, O., & López, F. A. (2020). Oxidized and Non-Oxidized Multiwalled Carbon Nanotubes as Materials for Adsorption of Lanthanum(III) Aqueous Solutions. Metals, 10(6), 765. https://doi.org/10.3390/met10060765

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