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On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes

TecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC), Avda. Gregorio del Amo 8. 28040 Madrid, Spain
Author to whom correspondence should be addressed.
Metals 2020, 10(8), 1057;
Received: 20 July 2020 / Revised: 3 August 2020 / Accepted: 4 August 2020 / Published: 5 August 2020
Commercially available oxidized (carboxylic groups) and nonoxidized multiwalled carbon nanotubes were studied as adsorbents of cerium(III) in batch operation mode. Several variables affecting the rare earth adsorption were investigated, including: the stirring speed applied to the system, the pH of the solution, and the metal concentration and carbon dosages. Although the removal of cerium from the solution is different and dependent upon the adsorbent type—(i) adsorption in nonoxidized multiwalled carbon nanotubes, (ii) cation exchange in the case of using oxidized multiwalled carbon nanotubes—the adsorption kinetics, the rate law and the isotherm models are the same for both adsorbents: pseudo-second order, film diffusion, and Langmuir Type-1, respectively. Cerium is desorbed from loaded adsorbents using acidic solutions. View Full-Text
Keywords: adsorption; carbon nanotubes; rare earth adsorption; carbon nanotubes; rare earth
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MDPI and ACS Style

Alguacil, F.J.; García-Díaz, I.; Escudero Baquero, E.; Rodríguez Largo, O.; López, F.A. On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes. Metals 2020, 10, 1057.

AMA Style

Alguacil FJ, García-Díaz I, Escudero Baquero E, Rodríguez Largo O, López FA. On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes. Metals. 2020; 10(8):1057.

Chicago/Turabian Style

Alguacil, Francisco J., Irene García-Díaz, Esther Escudero Baquero, Olga Rodríguez Largo, and Félix A. López. 2020. "On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes" Metals 10, no. 8: 1057.

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