Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/107171 https://doi.org/10.3390/molecules24203701 |
Resumo: | Serious environmental and health problems arise from the everyday release of industrial wastewater effluents. A wide range of pollutants, such as volatile organic compounds, heavy metals or textile dyes, may be efficiently removed by silica materials advanced solutions such as aerogels. This option is related to their exceptional characteristics that favors the adsorption of different contaminants. The aerogels performance can be selectively tuned by an appropriate chemical or physical modification of the aerogel's surface. Therefore, the introduction of amine groups enhances the affinity between different organic and inorganic contaminants and the silica aerogels. In this work, different case studies are reported to investigate and better understand the role of these functional groups in the adsorption process, since the properties of the synthesized aerogels were significantly affected, regarding their microstructure and surface area. In general, an improvement of the removal efficiency after functionalization of aerogels with amine groups was found, with removal efficiencies higher than 90% for lead and Rubi Levafix CA. To explain the adsorption mechanism, both Langmuir and Freundlich models were applied; chemisorption is most likely the sorption type taking place in the studied cases. |
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Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutantssilica aerogelsamine modificationvolatile organic compoundsheavy metalstextile dyesadsorptionAdsorptionAminesColoring AgentsKineticsMetals, HeavySilicon DioxideSilicone GelsVolatile Organic CompoundsEnvironmental PollutantsSerious environmental and health problems arise from the everyday release of industrial wastewater effluents. A wide range of pollutants, such as volatile organic compounds, heavy metals or textile dyes, may be efficiently removed by silica materials advanced solutions such as aerogels. This option is related to their exceptional characteristics that favors the adsorption of different contaminants. The aerogels performance can be selectively tuned by an appropriate chemical or physical modification of the aerogel's surface. Therefore, the introduction of amine groups enhances the affinity between different organic and inorganic contaminants and the silica aerogels. In this work, different case studies are reported to investigate and better understand the role of these functional groups in the adsorption process, since the properties of the synthesized aerogels were significantly affected, regarding their microstructure and surface area. In general, an improvement of the removal efficiency after functionalization of aerogels with amine groups was found, with removal efficiencies higher than 90% for lead and Rubi Levafix CA. To explain the adsorption mechanism, both Langmuir and Freundlich models were applied; chemisorption is most likely the sorption type taking place in the studied cases.MDPI2019-10-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/107171http://hdl.handle.net/10316/107171https://doi.org/10.3390/molecules24203701eng1420-3049Lamy-Mendes, AlyneTorres, Rafael B.Vareda, João P.Lopes, DavidFerreira, MarcoValente, VanessaGirão, Ana V.Valente, Artur J. M.Durães, Luisainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-06-13T08:59:21Zoai:estudogeral.uc.pt:10316/107171Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:23:31.901703Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
title |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
spellingShingle |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants Lamy-Mendes, Alyne silica aerogels amine modification volatile organic compounds heavy metals textile dyes adsorption Adsorption Amines Coloring Agents Kinetics Metals, Heavy Silicon Dioxide Silicone Gels Volatile Organic Compounds Environmental Pollutants |
title_short |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
title_full |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
title_fullStr |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
title_full_unstemmed |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
title_sort |
Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
author |
Lamy-Mendes, Alyne |
author_facet |
Lamy-Mendes, Alyne Torres, Rafael B. Vareda, João P. Lopes, David Ferreira, Marco Valente, Vanessa Girão, Ana V. Valente, Artur J. M. Durães, Luisa |
author_role |
author |
author2 |
Torres, Rafael B. Vareda, João P. Lopes, David Ferreira, Marco Valente, Vanessa Girão, Ana V. Valente, Artur J. M. Durães, Luisa |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Lamy-Mendes, Alyne Torres, Rafael B. Vareda, João P. Lopes, David Ferreira, Marco Valente, Vanessa Girão, Ana V. Valente, Artur J. M. Durães, Luisa |
dc.subject.por.fl_str_mv |
silica aerogels amine modification volatile organic compounds heavy metals textile dyes adsorption Adsorption Amines Coloring Agents Kinetics Metals, Heavy Silicon Dioxide Silicone Gels Volatile Organic Compounds Environmental Pollutants |
topic |
silica aerogels amine modification volatile organic compounds heavy metals textile dyes adsorption Adsorption Amines Coloring Agents Kinetics Metals, Heavy Silicon Dioxide Silicone Gels Volatile Organic Compounds Environmental Pollutants |
description |
Serious environmental and health problems arise from the everyday release of industrial wastewater effluents. A wide range of pollutants, such as volatile organic compounds, heavy metals or textile dyes, may be efficiently removed by silica materials advanced solutions such as aerogels. This option is related to their exceptional characteristics that favors the adsorption of different contaminants. The aerogels performance can be selectively tuned by an appropriate chemical or physical modification of the aerogel's surface. Therefore, the introduction of amine groups enhances the affinity between different organic and inorganic contaminants and the silica aerogels. In this work, different case studies are reported to investigate and better understand the role of these functional groups in the adsorption process, since the properties of the synthesized aerogels were significantly affected, regarding their microstructure and surface area. In general, an improvement of the removal efficiency after functionalization of aerogels with amine groups was found, with removal efficiencies higher than 90% for lead and Rubi Levafix CA. To explain the adsorption mechanism, both Langmuir and Freundlich models were applied; chemisorption is most likely the sorption type taking place in the studied cases. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/107171 http://hdl.handle.net/10316/107171 https://doi.org/10.3390/molecules24203701 |
url |
http://hdl.handle.net/10316/107171 https://doi.org/10.3390/molecules24203701 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1420-3049 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134122206035968 |