On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes
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...
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doaj-1b74ccbc9c1848198d1aa8192f16955f2020-11-25T03:17:39ZengMDPI AGMetals2075-47012020-08-01101057105710.3390/met10081057On the Adsorption of Cerium(III) Using Multiwalled Carbon NanotubesFrancisco José Alguacil0Irene García-Díaz1Esther Escudero Baquero2Olga Rodríguez Largo3Félix Antonio López4TecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC). Avda. Gregorio del Amo 8. 28040 Madrid, SpainTecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC). Avda. Gregorio del Amo 8. 28040 Madrid, SpainTecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC). Avda. Gregorio del Amo 8. 28040 Madrid, SpainTecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC). Avda. Gregorio del Amo 8. 28040 Madrid, SpainTecnoEco Group, Department of Primary Metallurgy and Materials Recycling, Centro Nacional de Investigaciones Metalurgicas (CSIC). Avda. Gregorio del Amo 8. 28040 Madrid, SpainCommercially 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.https://www.mdpi.com/2075-4701/10/8/1057adsorptioncarbon nanotubesrare earth |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Francisco José Alguacil Irene García-Díaz Esther Escudero Baquero Olga Rodríguez Largo Félix Antonio López |
spellingShingle |
Francisco José Alguacil Irene García-Díaz Esther Escudero Baquero Olga Rodríguez Largo Félix Antonio López On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes Metals adsorption carbon nanotubes rare earth |
author_facet |
Francisco José Alguacil Irene García-Díaz Esther Escudero Baquero Olga Rodríguez Largo Félix Antonio López |
author_sort |
Francisco José Alguacil |
title |
On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes |
title_short |
On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes |
title_full |
On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes |
title_fullStr |
On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes |
title_full_unstemmed |
On the Adsorption of Cerium(III) Using Multiwalled Carbon Nanotubes |
title_sort |
on the adsorption of cerium(iii) using multiwalled carbon nanotubes |
publisher |
MDPI AG |
series |
Metals |
issn |
2075-4701 |
publishDate |
2020-08-01 |
description |
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. |
topic |
adsorption carbon nanotubes rare earth |
url |
https://www.mdpi.com/2075-4701/10/8/1057 |
work_keys_str_mv |
AT franciscojosealguacil ontheadsorptionofceriumiiiusingmultiwalledcarbonnanotubes AT irenegarciadiaz ontheadsorptionofceriumiiiusingmultiwalledcarbonnanotubes AT estherescuderobaquero ontheadsorptionofceriumiiiusingmultiwalledcarbonnanotubes AT olgarodriguezlargo ontheadsorptionofceriumiiiusingmultiwalledcarbonnanotubes AT felixantoniolopez ontheadsorptionofceriumiiiusingmultiwalledcarbonnanotubes |
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