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

Francisco J. Alguacil; Irene García-Díaz; Esther Escudero Baquero; Olga Rodríguez Largo; Félix Antonio López

doi:10.20944/preprints202005.0302.v1

Preprint Article Version 1 This version is not peer-reviewed

Version 1 : Received: 18 May 2020 / Approved: 18 May 2020 / Online: 18 May 2020 (12:35:28 CEST)

The behaviour of oxidized and non-oxidized multiwalled carbon nanotubes 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 kinetics and isotherm models, being the rate law 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. Sulphuric acid solutions seem to be appropriate to recover the metal from La-loaded nanomaterials.

lanthanum; multiwalled carbon nanotubes; adsorption; recovery

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

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