Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue 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/22524 |
Resumo: | In this study, two silica xerogels were synthesized by sol-gel method using an acidic aqueous solution and a basic aqueous solution as catalysts for each material, named as SiO2-A and SiO2-B, respectively. Dyes, such as methylene blue (MB), are common contaminants present in wastewater from textile industries and the search for or improvement of processes capable of reducing these damages by retention these pollutants is extremely important. These xerogels were used as adsorbent for removing methylene blue (MB) from aqueous solutions. Ultra-Violet visible spectroscopy was used to monitor the adsorption process. The porosity and morphology of these xerogels were studied by using N2 adsorption and desorption isotherms and scanning electron microscopy (SEM), respectively. The experimental data showed that the MB adsorption is higher at pH 9,0 for both xerogels, with a high performance for the SiO2-B xerogel. These results best fitted to Langmuir isotherm model, attaining values of maximum adsorption mass of 50,6 mg g-1 and 8,24 mg g-1 of MB for the SiO2-B and SiO2-A, respectively. The SEM images show that the SiO2-A has a smooth surface, while the SiO2 B has a rough morphology with agglomerates. The porosity data show these xerogels are mesoporous. Our experiments demonstrated that the SiO2-A and SiO2-B xerogels could be used in environmental applications to removal of water pollutants such as dyes. |
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Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium Influencia de la catálisis ácida y básica en la síntesis de xerogeles de sílice para la adsorción de azul de metileno en medio acuoso Influência da catálise ácida e básica na síntese de xerogéis de sílica para a adsorção de azul de metileno em meio aquoso Methylene blueAdsorptionSilica xerogelsSol-gel process.Azul de metilenoAdsorciónXerogeles de síliceProceso sol-gel.Azul de metilenoAdsorçãoXerogéis de sílicaProcesso sol-gel.In this study, two silica xerogels were synthesized by sol-gel method using an acidic aqueous solution and a basic aqueous solution as catalysts for each material, named as SiO2-A and SiO2-B, respectively. Dyes, such as methylene blue (MB), are common contaminants present in wastewater from textile industries and the search for or improvement of processes capable of reducing these damages by retention these pollutants is extremely important. These xerogels were used as adsorbent for removing methylene blue (MB) from aqueous solutions. Ultra-Violet visible spectroscopy was used to monitor the adsorption process. The porosity and morphology of these xerogels were studied by using N2 adsorption and desorption isotherms and scanning electron microscopy (SEM), respectively. The experimental data showed that the MB adsorption is higher at pH 9,0 for both xerogels, with a high performance for the SiO2-B xerogel. These results best fitted to Langmuir isotherm model, attaining values of maximum adsorption mass of 50,6 mg g-1 and 8,24 mg g-1 of MB for the SiO2-B and SiO2-A, respectively. The SEM images show that the SiO2-A has a smooth surface, while the SiO2 B has a rough morphology with agglomerates. The porosity data show these xerogels are mesoporous. Our experiments demonstrated that the SiO2-A and SiO2-B xerogels could be used in environmental applications to removal of water pollutants such as dyes.En este trabajo, se prepararon dos xerogeles de sílice mediante un proceso sol-gel utilizando una solución acuosa ácida y una solución acuosa básica como catalizadores para cada material, denominados SiO2-A y SiO2-B, respectivamente. Los colorantes, como el azul de metileno (AM), son contaminantes comunes presentes en las aguas residuales de las industrias textiles y la búsqueda o mejora de procesos capaces de reducir este daño mediante la retención de estos contaminantes, es de suma importancia. Estos xerogeles se utilizaron como adsorbentes para la eliminación de AM de soluciones acuosas. Se utilizó la espectroscopia de absorción ultravioleta y visible para controlar el proceso de adsorción. La porosidad y la morfología de estos xerogeles se estudiaron mediante isotermas de adsorción y desorción de N2 y microscopía electrónica de barrido (SEM), respectivamente. Los datos experimentales mostraron que la adsorción de AM es mayor a pH 9,0, para ambos xerogeles, con un alto rendimiento para el xerogel SiO2-B. Estos resultados se ajustaron mejor al modelo de isoterma de Langmuir, alcanzando valores máximos de masa de adsorción de 50,6 mg g-1 y 8,24 mg g-1 de AM para SiO2-B y SiO2-A, respectivamente. Las imágenes de SEM mostraron que el xerogel SiO2-A tiene una superficie lisa, mientras que el SiO2-B tiene una morfología áspera y aglomerada. Los datos de porosidad mostraron que estos xerogeles son mesoporosos. Nuestros experimentos demostraron que los xerogeles SiO2-A y SiO2-B podrían utilizarse en aplicaciones médio ambientales para la eliminación de contaminantes del agua, como los colorantes.Neste trabalho, dois xerogéis de sílica foram preparados pelo processo sol-gel usando uma solução aquosa ácida e uma solução aquosa básica como catalisadores para cada material, nomeados como SiO2-A e SiO2-B, respectivamente. Corantes, como o azul de metileno (AM), são contaminantes comuns presentes em águas residuais de indústrias têxteis e a busca ou aperfeiçoamento de processos capazes de reduzir esses danos via retenção destes poluentes, é de extrema importância. Esses xerogéis foram usados como adsorventes para a remoção de AM de soluções aquosas. Espectroscopia de absorção nas regiões do Ultra-Violeta e do visível foi usada para monitorar o processo de adsorção. A porosidade e a morfologia destes xerogéis foram estudadas usando isotermas de adsorção e de dessorção de N2 e Microscopia Eletrônica de Varredura (MEV), respectivamente. Os dados experimentais mostraram que a adsorção de AM é maior em pH 9,0, para ambos os xerogéis, com uma alta performance para o xerogel SiO2-B. Estes resultados foram melhor ajustados ao modelo da isoterma de Langmuir, atingindo valores de massa máxima de adsorção de 50,6 mg g-1 e 8,24 mg g-1 de AM para SiO2-B e SiO2-A, respectivamente. As imagens de MEV mostraram que o xerogel SiO2-A possui uma superfície lisa, enquanto que SiO2-B tem uma morfologia rugosa e com aglomerados. Os dados de porosidade mostraram que esses xerogéis são mesoporosos. Nossos experimentos demonstraram que os xerogéis SiO2-A e SiO2-B poderiam ser usados em aplicações ambientais para a remoção de poluentes da água tais como corantes.Research, Society and Development2021-11-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/2252410.33448/rsd-v10i15.22524Research, Society and Development; Vol. 10 No. 15; e132101522524Research, Society and Development; Vol. 10 Núm. 15; e132101522524Research, Society and Development; v. 10 n. 15; e1321015225242525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIporhttps://rsdjournal.org/index.php/rsd/article/view/22524/20137Copyright (c) 2021 Pedro Henrique de Paulo Olívio; Gabriel Vinicius Buzato; Adriano Lopes de Souzahttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessOlívio, Pedro Henrique de PauloBuzato, Gabriel ViniciusSouza, Adriano Lopes de 2021-12-06T10:13:53Zoai:ojs.pkp.sfu.ca:article/22524Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:41:39.909076Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false |
dc.title.none.fl_str_mv |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium Influencia de la catálisis ácida y básica en la síntesis de xerogeles de sílice para la adsorción de azul de metileno en medio acuoso Influência da catálise ácida e básica na síntese de xerogéis de sílica para a adsorção de azul de metileno em meio aquoso |
title |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
spellingShingle |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium Olívio, Pedro Henrique de Paulo Methylene blue Adsorption Silica xerogels Sol-gel process. Azul de metileno Adsorción Xerogeles de sílice Proceso sol-gel. Azul de metileno Adsorção Xerogéis de sílica Processo sol-gel. |
title_short |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
title_full |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
title_fullStr |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
title_full_unstemmed |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
title_sort |
Influence of acidic and basic catalysis on the synthesis of silica xerogels for the adsorption of methylene blue in aqueous medium |
author |
Olívio, Pedro Henrique de Paulo |
author_facet |
Olívio, Pedro Henrique de Paulo Buzato, Gabriel Vinicius Souza, Adriano Lopes de |
author_role |
author |
author2 |
Buzato, Gabriel Vinicius Souza, Adriano Lopes de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Olívio, Pedro Henrique de Paulo Buzato, Gabriel Vinicius Souza, Adriano Lopes de |
dc.subject.por.fl_str_mv |
Methylene blue Adsorption Silica xerogels Sol-gel process. Azul de metileno Adsorción Xerogeles de sílice Proceso sol-gel. Azul de metileno Adsorção Xerogéis de sílica Processo sol-gel. |
topic |
Methylene blue Adsorption Silica xerogels Sol-gel process. Azul de metileno Adsorción Xerogeles de sílice Proceso sol-gel. Azul de metileno Adsorção Xerogéis de sílica Processo sol-gel. |
description |
In this study, two silica xerogels were synthesized by sol-gel method using an acidic aqueous solution and a basic aqueous solution as catalysts for each material, named as SiO2-A and SiO2-B, respectively. Dyes, such as methylene blue (MB), are common contaminants present in wastewater from textile industries and the search for or improvement of processes capable of reducing these damages by retention these pollutants is extremely important. These xerogels were used as adsorbent for removing methylene blue (MB) from aqueous solutions. Ultra-Violet visible spectroscopy was used to monitor the adsorption process. The porosity and morphology of these xerogels were studied by using N2 adsorption and desorption isotherms and scanning electron microscopy (SEM), respectively. The experimental data showed that the MB adsorption is higher at pH 9,0 for both xerogels, with a high performance for the SiO2-B xerogel. These results best fitted to Langmuir isotherm model, attaining values of maximum adsorption mass of 50,6 mg g-1 and 8,24 mg g-1 of MB for the SiO2-B and SiO2-A, respectively. The SEM images show that the SiO2-A has a smooth surface, while the SiO2 B has a rough morphology with agglomerates. The porosity data show these xerogels are mesoporous. Our experiments demonstrated that the SiO2-A and SiO2-B xerogels could be used in environmental applications to removal of water pollutants such as dyes. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-11-21 |
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/22524 10.33448/rsd-v10i15.22524 |
url |
https://rsdjournal.org/index.php/rsd/article/view/22524 |
identifier_str_mv |
10.33448/rsd-v10i15.22524 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://rsdjournal.org/index.php/rsd/article/view/22524/20137 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2021 Pedro Henrique de Paulo Olívio; Gabriel Vinicius Buzato; Adriano Lopes de Souza https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2021 Pedro Henrique de Paulo Olívio; Gabriel Vinicius Buzato; 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. 15; e132101522524 Research, Society and Development; Vol. 10 Núm. 15; e132101522524 Research, Society and Development; v. 10 n. 15; e132101522524 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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1797052819410255872 |