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Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground

This paper describes the physicochemical study of the adsorption of dysprosium (Dy(3+)) in aqueous solution onto two types of activated carbons synthesized from spent coffee ground. Potassium hydroxide (KOH)-activated carbon is a microporous material with a specific Brunauer–Emmett–Teller (BET) surf...

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Autores principales: Alcaraz, Lorena, Escudero, María Esther, Alguacil, Francisco José, Llorente, Irene, Urbieta, Ana, Fernández, Paloma, López, Félix Antonio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6836174/
https://www.ncbi.nlm.nih.gov/pubmed/31557794
http://dx.doi.org/10.3390/nano9101372
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author Alcaraz, Lorena
Escudero, María Esther
Alguacil, Francisco José
Llorente, Irene
Urbieta, Ana
Fernández, Paloma
López, Félix Antonio
author_facet Alcaraz, Lorena
Escudero, María Esther
Alguacil, Francisco José
Llorente, Irene
Urbieta, Ana
Fernández, Paloma
López, Félix Antonio
author_sort Alcaraz, Lorena
collection PubMed
description This paper describes the physicochemical study of the adsorption of dysprosium (Dy(3+)) in aqueous solution onto two types of activated carbons synthesized from spent coffee ground. Potassium hydroxide (KOH)-activated carbon is a microporous material with a specific Brunauer–Emmett–Teller (BET) surface area of 2330 m(2)·g(−1) and pores with a diameter of 3.2 nm. Carbon activated with water vapor and N(2) is a solid mesoporous, with pores of 5.7 nm in diameter and a specific surface of 982 m(2)·g(−1). A significant dependence of the adsorption capacity on the solution pH was found, but it does not significantly depend on the dysprosium concentration nor on the temperature. A maximum adsorption capacity of 31.26 mg·g(−1) and 33.52 mg·g(−1) for the chemically and physically activated carbons, respectively, were found. In both cases, the results obtained from adsorption isotherms and kinetic study were better a fit to the Langmuir model and pseudo-second-order kinetics. In addition, thermodynamic results indicate that dysprosium adsorption onto both activated carbons is an exothermic, spontaneous, and favorable process.
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spelling pubmed-68361742019-11-25 Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground Alcaraz, Lorena Escudero, María Esther Alguacil, Francisco José Llorente, Irene Urbieta, Ana Fernández, Paloma López, Félix Antonio Nanomaterials (Basel) Article This paper describes the physicochemical study of the adsorption of dysprosium (Dy(3+)) in aqueous solution onto two types of activated carbons synthesized from spent coffee ground. Potassium hydroxide (KOH)-activated carbon is a microporous material with a specific Brunauer–Emmett–Teller (BET) surface area of 2330 m(2)·g(−1) and pores with a diameter of 3.2 nm. Carbon activated with water vapor and N(2) is a solid mesoporous, with pores of 5.7 nm in diameter and a specific surface of 982 m(2)·g(−1). A significant dependence of the adsorption capacity on the solution pH was found, but it does not significantly depend on the dysprosium concentration nor on the temperature. A maximum adsorption capacity of 31.26 mg·g(−1) and 33.52 mg·g(−1) for the chemically and physically activated carbons, respectively, were found. In both cases, the results obtained from adsorption isotherms and kinetic study were better a fit to the Langmuir model and pseudo-second-order kinetics. In addition, thermodynamic results indicate that dysprosium adsorption onto both activated carbons is an exothermic, spontaneous, and favorable process. MDPI 2019-09-25 /pmc/articles/PMC6836174/ /pubmed/31557794 http://dx.doi.org/10.3390/nano9101372 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Alcaraz, Lorena
Escudero, María Esther
Alguacil, Francisco José
Llorente, Irene
Urbieta, Ana
Fernández, Paloma
López, Félix Antonio
Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title_full Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title_fullStr Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title_full_unstemmed Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title_short Dysprosium Removal from Water Using Active Carbons Obtained from Spent Coffee Ground
title_sort dysprosium removal from water using active carbons obtained from spent coffee ground
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6836174/
https://www.ncbi.nlm.nih.gov/pubmed/31557794
http://dx.doi.org/10.3390/nano9101372
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