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Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation

In this work, different mesoporous silicas were studied as potential sorbents for toluene, selected as a model molecule of aromatic organic fuel-based pollutants. Three siliceous materials with different textural and surface properties (i.e., fumed silica and mesoporous Santa Barbara Amorphous (SBA)...

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Autores principales: Vittoni, Chiara, Gatti, Giorgio, Braschi, Ilaria, Buscaroli, Enrico, Golemme, Giovanni, Marchese, Leonardo, Bisio, Chiara
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7344446/
https://www.ncbi.nlm.nih.gov/pubmed/32545646
http://dx.doi.org/10.3390/ma13122690
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author Vittoni, Chiara
Gatti, Giorgio
Braschi, Ilaria
Buscaroli, Enrico
Golemme, Giovanni
Marchese, Leonardo
Bisio, Chiara
author_facet Vittoni, Chiara
Gatti, Giorgio
Braschi, Ilaria
Buscaroli, Enrico
Golemme, Giovanni
Marchese, Leonardo
Bisio, Chiara
author_sort Vittoni, Chiara
collection PubMed
description In this work, different mesoporous silicas were studied as potential sorbents for toluene, selected as a model molecule of aromatic organic fuel-based pollutants. Three siliceous materials with different textural and surface properties (i.e., fumed silica and mesoporous Santa Barbara Amorphous (SBA)-15 and Mobil Composition of matter (MCM)-41 materials) were considered and the effect of their physico-chemical properties on the toluene adsorption process was studied. In particular, FT-IR spectroscopy was used to qualitatively study the interactions between the toluene molecule and the surface of silicas, while volumetric adsorption analysis allowed the quantitative determination of the toluene adsorption capacity. The combined use of these techniques revealed that textural properties of the sorbents, primarily porosity, are the driving forces that control the adsorption process. Considering that, under real conditions of usage, the sorbents are soaked in water, their hydrothermal stability was also investigated and toluene adsorption by both the gas and aqueous phase on hydrothermally pre-treated samples was studied. The presence of ordered porosity, together with the different pore size distribution and the amount of silanol groups, strongly affected the adsorption process. In toluene adsorption from water, SBA-15 performed better than MCM-41.
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spelling pubmed-73444462020-07-14 Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation Vittoni, Chiara Gatti, Giorgio Braschi, Ilaria Buscaroli, Enrico Golemme, Giovanni Marchese, Leonardo Bisio, Chiara Materials (Basel) Article In this work, different mesoporous silicas were studied as potential sorbents for toluene, selected as a model molecule of aromatic organic fuel-based pollutants. Three siliceous materials with different textural and surface properties (i.e., fumed silica and mesoporous Santa Barbara Amorphous (SBA)-15 and Mobil Composition of matter (MCM)-41 materials) were considered and the effect of their physico-chemical properties on the toluene adsorption process was studied. In particular, FT-IR spectroscopy was used to qualitatively study the interactions between the toluene molecule and the surface of silicas, while volumetric adsorption analysis allowed the quantitative determination of the toluene adsorption capacity. The combined use of these techniques revealed that textural properties of the sorbents, primarily porosity, are the driving forces that control the adsorption process. Considering that, under real conditions of usage, the sorbents are soaked in water, their hydrothermal stability was also investigated and toluene adsorption by both the gas and aqueous phase on hydrothermally pre-treated samples was studied. The presence of ordered porosity, together with the different pore size distribution and the amount of silanol groups, strongly affected the adsorption process. In toluene adsorption from water, SBA-15 performed better than MCM-41. MDPI 2020-06-12 /pmc/articles/PMC7344446/ /pubmed/32545646 http://dx.doi.org/10.3390/ma13122690 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
Vittoni, Chiara
Gatti, Giorgio
Braschi, Ilaria
Buscaroli, Enrico
Golemme, Giovanni
Marchese, Leonardo
Bisio, Chiara
Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title_full Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title_fullStr Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title_full_unstemmed Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title_short Toluene Adsorption by Mesoporous Silicas with Different Textural Properties: A Model Study for VOCs Retention and Water Remediation
title_sort toluene adsorption by mesoporous silicas with different textural properties: a model study for vocs retention and water remediation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7344446/
https://www.ncbi.nlm.nih.gov/pubmed/32545646
http://dx.doi.org/10.3390/ma13122690
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