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Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties

The effect of the counteranion of hexadecyltrimethylammonium salts on the physico-chemical properties of organoclays was investigated, using a selected natural clay mineral with a cation exchange capacity of 95 meq/100 g. The uptake amount of C(16) cations was dependent on the hexadecyltrimethylammo...

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Autores principales: Kooli, Fethi, Rakass, Souad, Liu, Yan, Abboudi, Mostafa, Oudghiri Hassani, Hicham, Muhammad Ibrahim, Sheikh, Al Wadaani, Fahd, Al-Faze, Rawan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720785/
https://www.ncbi.nlm.nih.gov/pubmed/31434234
http://dx.doi.org/10.3390/molecules24163015
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author Kooli, Fethi
Rakass, Souad
Liu, Yan
Abboudi, Mostafa
Oudghiri Hassani, Hicham
Muhammad Ibrahim, Sheikh
Al Wadaani, Fahd
Al-Faze, Rawan
author_facet Kooli, Fethi
Rakass, Souad
Liu, Yan
Abboudi, Mostafa
Oudghiri Hassani, Hicham
Muhammad Ibrahim, Sheikh
Al Wadaani, Fahd
Al-Faze, Rawan
author_sort Kooli, Fethi
collection PubMed
description The effect of the counteranion of hexadecyltrimethylammonium salts on the physico-chemical properties of organoclays was investigated, using a selected natural clay mineral with a cation exchange capacity of 95 meq/100 g. The uptake amount of C(16) cations was dependent on the hexadecyltrimethylammonium (C(16)) salt solution used, the organoclay prepared from C(16)Br salt solution exhibited a value of 1. 05 mmole/g higher than those prepared from C(16)Cl and C(16)OH salt solutions. The basal spacing of these organoclays was in the range of 1.81 nm to 2.10 nm, indicating a similar orientation of the intercalated surfactants, and could indicated that the excess amount of surfactants, above the cation exchange capacity of 0.95 meq/g could be adsorbed on the external surface of the clay mineral sheets. These organoclays were found to be stable in neutral, acidic, and basic media. The thermal stability of these organoclays was carried out using thermogravimetric analysis and in-situ X-ray diffraction (XRD) techniques. The decomposition of the surfactant occurred at a maximum temperature of 240 °C, accompanied with a decrease of the basal spacing value close to 1.42 nm. The application of these organoclays was investigated to remove an acidic dye, eosin. The removal amount was related to the initial used concentrations, the amount of the surfactants contents, and to the preheated temperatures of the organoclays. The removal was found to be endothermic process with a maximum amount of 55 mg of eosin/g of organoclay. The value decreased to 25 mg/g, when the intercalated surfactants were decomposed. The reuse of these organoclays was limited to four regeneration recycles with a reduction of 20 to 30%. However, noticeable reduction between 35% to 50% of the initial efficiency, was achieved after the fifth cycle, depending of the used organoclays.
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spelling pubmed-67207852019-09-10 Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties Kooli, Fethi Rakass, Souad Liu, Yan Abboudi, Mostafa Oudghiri Hassani, Hicham Muhammad Ibrahim, Sheikh Al Wadaani, Fahd Al-Faze, Rawan Molecules Article The effect of the counteranion of hexadecyltrimethylammonium salts on the physico-chemical properties of organoclays was investigated, using a selected natural clay mineral with a cation exchange capacity of 95 meq/100 g. The uptake amount of C(16) cations was dependent on the hexadecyltrimethylammonium (C(16)) salt solution used, the organoclay prepared from C(16)Br salt solution exhibited a value of 1. 05 mmole/g higher than those prepared from C(16)Cl and C(16)OH salt solutions. The basal spacing of these organoclays was in the range of 1.81 nm to 2.10 nm, indicating a similar orientation of the intercalated surfactants, and could indicated that the excess amount of surfactants, above the cation exchange capacity of 0.95 meq/g could be adsorbed on the external surface of the clay mineral sheets. These organoclays were found to be stable in neutral, acidic, and basic media. The thermal stability of these organoclays was carried out using thermogravimetric analysis and in-situ X-ray diffraction (XRD) techniques. The decomposition of the surfactant occurred at a maximum temperature of 240 °C, accompanied with a decrease of the basal spacing value close to 1.42 nm. The application of these organoclays was investigated to remove an acidic dye, eosin. The removal amount was related to the initial used concentrations, the amount of the surfactants contents, and to the preheated temperatures of the organoclays. The removal was found to be endothermic process with a maximum amount of 55 mg of eosin/g of organoclay. The value decreased to 25 mg/g, when the intercalated surfactants were decomposed. The reuse of these organoclays was limited to four regeneration recycles with a reduction of 20 to 30%. However, noticeable reduction between 35% to 50% of the initial efficiency, was achieved after the fifth cycle, depending of the used organoclays. MDPI 2019-08-20 /pmc/articles/PMC6720785/ /pubmed/31434234 http://dx.doi.org/10.3390/molecules24163015 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
Kooli, Fethi
Rakass, Souad
Liu, Yan
Abboudi, Mostafa
Oudghiri Hassani, Hicham
Muhammad Ibrahim, Sheikh
Al Wadaani, Fahd
Al-Faze, Rawan
Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title_full Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title_fullStr Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title_full_unstemmed Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title_short Eosin Removal by Cetyl Trimethylammonium-Cloisites: Influence of the Surfactant Solution Type and Regeneration Properties
title_sort eosin removal by cetyl trimethylammonium-cloisites: influence of the surfactant solution type and regeneration properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720785/
https://www.ncbi.nlm.nih.gov/pubmed/31434234
http://dx.doi.org/10.3390/molecules24163015
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