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Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1

Two cyclodextrins (CDs), γ– and hydroxypropyl (HP)–γ–CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, par...

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Autores principales: Pellicer, José A., Rodríguez-López, María Isabel, Fortea, María Isabel, Gómez-López, Vicente M., Auñón, David, Núñez-Delicado, Estrella, Gabaldón, José A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7576497/
https://www.ncbi.nlm.nih.gov/pubmed/32825485
http://dx.doi.org/10.3390/polym12091880
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author Pellicer, José A.
Rodríguez-López, María Isabel
Fortea, María Isabel
Gómez-López, Vicente M.
Auñón, David
Núñez-Delicado, Estrella
Gabaldón, José A.
author_facet Pellicer, José A.
Rodríguez-López, María Isabel
Fortea, María Isabel
Gómez-López, Vicente M.
Auñón, David
Núñez-Delicado, Estrella
Gabaldón, José A.
author_sort Pellicer, José A.
collection PubMed
description Two cyclodextrins (CDs), γ– and hydroxypropyl (HP)–γ–CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, particle size distribution and thermogravimetric analysis. Experimental data for both polymers were well fitted to the pseudo-second order and intraparticle diffusion model, indicating that in the adsorption both chemical and physical interactions are essential in the removal of DR. Three different isotherm models were analyzed, concluding that γ–CDs–EPI followed the Temkin isotherm and HP–γ–CDs-EPI the Freundlich isotherm, these results suggested that the adsorption was happening onto heterogeneous surfaces. The results of the Gibbs free energy showed that the adsorption was spontaneous at room temperature. In order to eliminate the remaining dye after the polymer treatment, and advanced oxidation process (AOP) was considered, achieving more than 90% of removal combining both mechanisms.
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spelling pubmed-75764972020-10-28 Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1 Pellicer, José A. Rodríguez-López, María Isabel Fortea, María Isabel Gómez-López, Vicente M. Auñón, David Núñez-Delicado, Estrella Gabaldón, José A. Polymers (Basel) Article Two cyclodextrins (CDs), γ– and hydroxypropyl (HP)–γ–CDs were used to synthesize new adsorbents by using epichlorohydrin (EPI) as cross-linking agent in order to remove Direct Red 83:1 (DR) from water. Both polymers were characterized in terms of Fourier spectroscopy, nuclear magnetic resonance, particle size distribution and thermogravimetric analysis. Experimental data for both polymers were well fitted to the pseudo-second order and intraparticle diffusion model, indicating that in the adsorption both chemical and physical interactions are essential in the removal of DR. Three different isotherm models were analyzed, concluding that γ–CDs–EPI followed the Temkin isotherm and HP–γ–CDs-EPI the Freundlich isotherm, these results suggested that the adsorption was happening onto heterogeneous surfaces. The results of the Gibbs free energy showed that the adsorption was spontaneous at room temperature. In order to eliminate the remaining dye after the polymer treatment, and advanced oxidation process (AOP) was considered, achieving more than 90% of removal combining both mechanisms. MDPI 2020-08-20 /pmc/articles/PMC7576497/ /pubmed/32825485 http://dx.doi.org/10.3390/polym12091880 Text en © 2020 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
Pellicer, José A.
Rodríguez-López, María Isabel
Fortea, María Isabel
Gómez-López, Vicente M.
Auñón, David
Núñez-Delicado, Estrella
Gabaldón, José A.
Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title_full Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title_fullStr Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title_full_unstemmed Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title_short Synthesis of New Cyclodextrin-Based Adsorbents to Remove Direct Red 83:1
title_sort synthesis of new cyclodextrin-based adsorbents to remove direct red 83:1
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7576497/
https://www.ncbi.nlm.nih.gov/pubmed/32825485
http://dx.doi.org/10.3390/polym12091880
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