Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Research, Society and Development |
Texto Completo: | https://rsdjournal.org/index.php/rsd/article/view/24470 |
Resumo: | The incorrect discharge of dyes has been one of the main causes of water pollution. Actions to reduce these impacts have been performed, and an alternative is through the adsorption of dyes on silica-based materials such as xerogels. Very few experiments, however, show the modification of silica-based xerogels using surfactants for dye adsorption applications. In this paper, we report the preparation of silica-based xerogels (SiO2) to explore the influence of the surface modification with sodium dodecyl sulfate (SDS) in the adsorption behavior of an organic dye, crystal violet (CV), from water using Ultra-Violet visible spectroscopy. The textural properties of the xerogels, SiO2 unmodified (SiO2-UN) and SiO2-SDS modified (SiO2-SDS) showed that the samples are mesoporous. The surface charges for SiO2-UN and SiO2-SDS were negative at experimental conditions as shown by pH point of zero charge (PZC) data. The adsorption capacity of SiO2-SDS for VC was superior to that of SiO2-UN and, in addition, SiO2-SDS had a higher rate constant. This behavior is probably ascribed to the presence of SDS micelles formed into the pores of wet silica xerogels, suggesting electrostatic interaction between anionic head groups from the micelles and cationic VC. The adsorption kinetics were best fitted by the pseudo-second order model. The equilibrium data were best described to the Langmuir isotherm model. The qm values of CV on SiO2-SDS reached 25,8 mg g−1 and 1,59 mg g−1 on SiO2-UN. These findings are important to help in the treatment of industrial wastewater. |
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Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium Efecto de la modificación de un xerogel de sílice por dodecil sulfato de sodio para la adsorción del colorante violeta cristal en medios acuosos Efeito da modificação de um xerogel de sílica por dodecilsulfato de sódio para a adsorção do corante violeta cristal em meio aquoso Violeta cristalCoranteAdsorçãoXerogéis de sílica.Violeta de cristalAdsorciónXerogeles de sílice.Crystal violetDyeAdsorptionSilica xerogels.The incorrect discharge of dyes has been one of the main causes of water pollution. Actions to reduce these impacts have been performed, and an alternative is through the adsorption of dyes on silica-based materials such as xerogels. Very few experiments, however, show the modification of silica-based xerogels using surfactants for dye adsorption applications. In this paper, we report the preparation of silica-based xerogels (SiO2) to explore the influence of the surface modification with sodium dodecyl sulfate (SDS) in the adsorption behavior of an organic dye, crystal violet (CV), from water using Ultra-Violet visible spectroscopy. The textural properties of the xerogels, SiO2 unmodified (SiO2-UN) and SiO2-SDS modified (SiO2-SDS) showed that the samples are mesoporous. The surface charges for SiO2-UN and SiO2-SDS were negative at experimental conditions as shown by pH point of zero charge (PZC) data. The adsorption capacity of SiO2-SDS for VC was superior to that of SiO2-UN and, in addition, SiO2-SDS had a higher rate constant. This behavior is probably ascribed to the presence of SDS micelles formed into the pores of wet silica xerogels, suggesting electrostatic interaction between anionic head groups from the micelles and cationic VC. The adsorption kinetics were best fitted by the pseudo-second order model. The equilibrium data were best described to the Langmuir isotherm model. The qm values of CV on SiO2-SDS reached 25,8 mg g−1 and 1,59 mg g−1 on SiO2-UN. These findings are important to help in the treatment of industrial wastewater.La eliminación incorrecta de los tintes ha sido una de las causas de la contaminación del agua. Sin embargo, hay pocos informes que muestren la modificación de los xerogeles basados en sílice utilizando tensioactivos para la adsorción de colorantes. En este trabajo, preparamos xerogeles a base de sílice (SiO2) para explorar la influencia de la modificación con dodecil sulfato de sodio (SDS) en la adsorción de un colorante, el violeta de cristal (VC), en el agua utilizando la espectroscopia en la región ultravioleta visible. Las propiedades texturales de los xerogeles, del SiO2 no modificado (SiO2-NM) y del SiO2 modificado con SDS (SiO2-SDS) mostraron que las muestras son mesoporosas. Las cargas superficiales de SiO2-NM y SiO2-SDS fueron negativas en las condiciones experimentales utilizadas, como muestran los datos de pH en el punto de carga cero (PCZ). La capacidad de adsorción del SiO2-SDS para el CV fue mayor que la del SiO2-NM, con una constante de velocidad más alta para el SiO2-SDS. Este comportamiento se atribuyó a las micelas de SDS formadas en los poros de sílice seca, lo que sugiere interacciones electrostáticas entre las cabezas polares aniónicas de las micelas y el CV catiónico. La cinética de adsorción se ajustó mejor al modelo de pseudo segundo orden. Los datos de equilibrio se describieron mejor mediante el modelo de isoterma de Langmuir. Los valores de VC qm para SiO2-SDS fueron 25,8 mg g-1 y 1,59 mg g-1 en SiO2-NM. Estos resultados son importantes para ayudar al tratamiento de los efluentes industriales.O descarte incorreto de corantes tem sido uma das causas para a poluição de águas. Ações para reduzir estes impactos têm sido feitas, e uma alternativa é a adsorção de corantes em materiais à base de sílica como os xerogéis. Poucos relatos na literatura, entretanto, mostram a modificação de xerogéis à base de sílica usando tensoativos para adsorção de corantes. Neste trabalho, nós preparamos xerogéis à base de sílica (SiO2) para explorar a influência da modificação da superfície com dodecilsulfato de sódio (SDS) na adsorção de um corante, violeta cristal (VC), em água usando espectroscopia na região do ultra-violeta visível. As propriedades texturais dos xerogéis, SiO2 não modificado (SiO2-NM) e SiO2 modificado com SDS (SiO2-SDS) mostraram que as amostras são mesoporosas. As cargas superficiais para SiO2-NM e SiO2-SDS foram negativas nas condições experimentais usadas como mostrado pelos dados de pH no ponto de carga zero pH (PCZ). A capacidade de adsorção de SiO2-SDS para VC foi superior àquela para SiO2-NM, com maior constante de velocidade para SiO2-SDS. Este comportamento foi atribuído às micelas de SDS formadas nos poros da sílica seca, sugerindo interações eletrostáticas entre as cabeças polares aniônicas das micelas e o VC catiônico. As cinéticas de adsorção foram melhores ajustadas pelo modelo de pseudo segunda-ordem. Os dados de equilíbrio foram melhores descritos pelo modelo de isoterma de Langmuir. Os valores de qm de VC para SiO2-SDS foram de 25,8 mg g−1 e 1,59 mg g−1 on SiO2-NM. Estes resultados são importantes para auxiliar no tratamento de efluentes industriais.Research, Society and Development2021-12-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/2447010.33448/rsd-v10i17.24470Research, Society and Development; Vol. 10 No. 17; e78101724470Research, Society and Development; Vol. 10 Núm. 17; e78101724470Research, Society and Development; v. 10 n. 17; e781017244702525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/24470/21371Copyright (c) 2021 Gabriel Vinicius Buzato; Pedro Henrique de Paulo Olívio; Adriano Lopes de Souzahttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessBuzato, Gabriel ViniciusOlívio, Pedro Henrique de PauloSouza, Adriano Lopes de 2022-01-01T11:11:08Zoai:ojs.pkp.sfu.ca:article/24470Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:43:00.866858Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium Efecto de la modificación de un xerogel de sílice por dodecil sulfato de sodio para la adsorción del colorante violeta cristal en medios acuosos Efeito da modificação de um xerogel de sílica por dodecilsulfato de sódio para a adsorção do corante violeta cristal em meio aquoso |
title |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
spellingShingle |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium Buzato, Gabriel Vinicius Violeta cristal Corante Adsorção Xerogéis de sílica. Violeta de cristal Adsorción Xerogeles de sílice. Crystal violet Dye Adsorption Silica xerogels. |
title_short |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
title_full |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
title_fullStr |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
title_full_unstemmed |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
title_sort |
Effect of the modification of a silica xerogel by sodium dodecyl sulfate for the adsorption of crystal violet dye in aqueous medium |
author |
Buzato, Gabriel Vinicius |
author_facet |
Buzato, Gabriel Vinicius Olívio, Pedro Henrique de Paulo Souza, Adriano Lopes de |
author_role |
author |
author2 |
Olívio, Pedro Henrique de Paulo Souza, Adriano Lopes de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Buzato, Gabriel Vinicius Olívio, Pedro Henrique de Paulo Souza, Adriano Lopes de |
dc.subject.por.fl_str_mv |
Violeta cristal Corante Adsorção Xerogéis de sílica. Violeta de cristal Adsorción Xerogeles de sílice. Crystal violet Dye Adsorption Silica xerogels. |
topic |
Violeta cristal Corante Adsorção Xerogéis de sílica. Violeta de cristal Adsorción Xerogeles de sílice. Crystal violet Dye Adsorption Silica xerogels. |
description |
The incorrect discharge of dyes has been one of the main causes of water pollution. Actions to reduce these impacts have been performed, and an alternative is through the adsorption of dyes on silica-based materials such as xerogels. Very few experiments, however, show the modification of silica-based xerogels using surfactants for dye adsorption applications. In this paper, we report the preparation of silica-based xerogels (SiO2) to explore the influence of the surface modification with sodium dodecyl sulfate (SDS) in the adsorption behavior of an organic dye, crystal violet (CV), from water using Ultra-Violet visible spectroscopy. The textural properties of the xerogels, SiO2 unmodified (SiO2-UN) and SiO2-SDS modified (SiO2-SDS) showed that the samples are mesoporous. The surface charges for SiO2-UN and SiO2-SDS were negative at experimental conditions as shown by pH point of zero charge (PZC) data. The adsorption capacity of SiO2-SDS for VC was superior to that of SiO2-UN and, in addition, SiO2-SDS had a higher rate constant. This behavior is probably ascribed to the presence of SDS micelles formed into the pores of wet silica xerogels, suggesting electrostatic interaction between anionic head groups from the micelles and cationic VC. The adsorption kinetics were best fitted by the pseudo-second order model. The equilibrium data were best described to the Langmuir isotherm model. The qm values of CV on SiO2-SDS reached 25,8 mg g−1 and 1,59 mg g−1 on SiO2-UN. These findings are important to help in the treatment of industrial wastewater. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-21 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/24470 10.33448/rsd-v10i17.24470 |
url |
https://rsdjournal.org/index.php/rsd/article/view/24470 |
identifier_str_mv |
10.33448/rsd-v10i17.24470 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/24470/21371 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Gabriel Vinicius Buzato; Pedro Henrique de Paulo Olívio; Adriano Lopes de Souza https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Gabriel Vinicius Buzato; Pedro Henrique de Paulo Olívio; Adriano Lopes de Souza https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Research, Society and Development |
publisher.none.fl_str_mv |
Research, Society and Development |
dc.source.none.fl_str_mv |
Research, Society and Development; Vol. 10 No. 17; e78101724470 Research, Society and Development; Vol. 10 Núm. 17; e78101724470 Research, Society and Development; v. 10 n. 17; e78101724470 2525-3409 reponame:Research, Society and Development instname:Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
instname_str |
Universidade Federal de Itajubá (UNIFEI) |
instacron_str |
UNIFEI |
institution |
UNIFEI |
reponame_str |
Research, Society and Development |
collection |
Research, Society and Development |
repository.name.fl_str_mv |
Research, Society and Development - Universidade Federal de Itajubá (UNIFEI) |
repository.mail.fl_str_mv |
rsd.articles@gmail.com |
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1797052700234350592 |