MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media

Autores
Martin, Pedro Pablo; Rafti, Matías; Marchetti, Sergio Gustavo; Fellenz, Nicolás Antonio
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Martin, Pedro Pablo. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Martin, Pedro Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Rafti, Matías. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Buenos Aires, Argentina.
Fil: Marchetti, Sergio Gustavo. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge Juan Ronco". Buenos Aires, Argentina.
Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Fellenz, Nicolás Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Two mesoporous ordered silica with MCM-41 pores arrangement were synthesized and surface modified by a post-synthetic treatment. The first composite has aminopropyl functionalities while the other features amino-propyl and methyl surface groups. Both composites were used as sorbents for Cr(VI) removal from aqueous media at pH ꞊ 2. In order to test the stability and durability of the sorbents, the samples were subjected to alkaline extreme conditions (pH ꞊ 10) at different times and after that tested again for Cr(VI) removal. The bi- functionalized MCM-41 retains its Cr(VI) elimination capacity unchanged after 16 h of alkaline treatment, while the aminopropyl-MCM-41 sample suffer a drop of about 30%. The fresh and alkaline treated samples were characterized by X ray diffraction at low angles, nitrogen sorption at 77 K, Fourier transform infrared, Thermal analysis. The presence of the methyl moieties increases the hydrophobicity of the composite’s surface, which inhibit the approaching of the water molecules avoiding the hydrolysis of Si–O–Si bonds of the MCM-41 pores walls. Besides, this protective effect is reflected in the textural properties changes before and after alkaline treatments: while the specific surface area of aminopropyl-MCM-41 goes from an initial value of 793 to 495 m2 g
.
Materia
Ciencias Exactas y Naturales
Aminopropyl-MCM-41
Aminopropyl-methyl-MCM-41
Chromium
Stability
Sorbents
Ciencias Exactas y Naturales
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/6800
Acceder
id RIDUNRN_6bd34884d8f6f71a78377d88591cc716
oai_identifier_str oai:rid.unrn.edu.ar:20.500.12049/6800
network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous mediaMartin, Pedro PabloRafti, MatíasMarchetti, Sergio GustavoFellenz, Nicolás AntonioCiencias Exactas y NaturalesAminopropyl-MCM-41Aminopropyl-methyl-MCM-41ChromiumStabilitySorbentsCiencias Exactas y NaturalesFil: Martin, Pedro Pablo. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.Fil: Martin, Pedro Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.Fil: Rafti, Matías. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Buenos Aires, Argentina.Fil: Marchetti, Sergio Gustavo. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge Juan Ronco". Buenos Aires, Argentina.Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.Fil: Fellenz, Nicolás Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.Two mesoporous ordered silica with MCM-41 pores arrangement were synthesized and surface modified by a post-synthetic treatment. The first composite has aminopropyl functionalities while the other features amino-propyl and methyl surface groups. Both composites were used as sorbents for Cr(VI) removal from aqueous media at pH ꞊ 2. In order to test the stability and durability of the sorbents, the samples were subjected to alkaline extreme conditions (pH ꞊ 10) at different times and after that tested again for Cr(VI) removal. The bi- functionalized MCM-41 retains its Cr(VI) elimination capacity unchanged after 16 h of alkaline treatment, while the aminopropyl-MCM-41 sample suffer a drop of about 30%. The fresh and alkaline treated samples were characterized by X ray diffraction at low angles, nitrogen sorption at 77 K, Fourier transform infrared, Thermal analysis. The presence of the methyl moieties increases the hydrophobicity of the composite’s surface, which inhibit the approaching of the water molecules avoiding the hydrolysis of Si–O–Si bonds of the MCM-41 pores walls. Besides, this protective effect is reflected in the textural properties changes before and after alkaline treatments: while the specific surface area of aminopropyl-MCM-41 goes from an initial value of 793 to 495 m2 g.Elsevier2020-05-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfPedro, Martin., Matías, Rafti., Sergio, Marchetti., Nicolas, Fellenz. (2020) MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media. Solid State Sciences; 106; 106300.1293-2558https://www.sciencedirect.com/science/article/pii/S1293255819314797?via%3Dihub#!http://rid.unrn.edu.ar/handle/20.500.12049/6800https://doi.org/10.1016/j.solidstatesciences.2020.106300enghttps://www.sciencedirect.com/journal/solid-state-sciences106Solid State Sciencesinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-10-16T10:05:43Zoai:rid.unrn.edu.ar:20.500.12049/6800instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-10-16 10:05:43.315RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
title MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
spellingShingle MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
Martin, Pedro Pablo
Ciencias Exactas y Naturales
Aminopropyl-MCM-41
Aminopropyl-methyl-MCM-41
Chromium
Stability
Sorbents
Ciencias Exactas y Naturales
title_short MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
title_full MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
title_fullStr MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
title_full_unstemmed MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
title_sort MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media
dc.creator.none.fl_str_mv Martin, Pedro Pablo
Rafti, Matías
Marchetti, Sergio Gustavo
Fellenz, Nicolás Antonio
author Martin, Pedro Pablo
author_facet Martin, Pedro Pablo
Rafti, Matías
Marchetti, Sergio Gustavo
Fellenz, Nicolás Antonio
author_role author
author2 Rafti, Matías
Marchetti, Sergio Gustavo
Fellenz, Nicolás Antonio
author2_role author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas y Naturales
Aminopropyl-MCM-41
Aminopropyl-methyl-MCM-41
Chromium
Stability
Sorbents
Ciencias Exactas y Naturales
topic Ciencias Exactas y Naturales
Aminopropyl-MCM-41
Aminopropyl-methyl-MCM-41
Chromium
Stability
Sorbents
Ciencias Exactas y Naturales
dc.description.none.fl_txt_mv Fil: Martin, Pedro Pablo. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Martin, Pedro Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Rafti, Matías. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Buenos Aires, Argentina.
Fil: Marchetti, Sergio Gustavo. Universidad Nacional de La Plata. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. Jorge Juan Ronco". Buenos Aires, Argentina.
Fil: Fellenz, Nicolás Antonio. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Fil: Fellenz, Nicolás Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
Two mesoporous ordered silica with MCM-41 pores arrangement were synthesized and surface modified by a post-synthetic treatment. The first composite has aminopropyl functionalities while the other features amino-propyl and methyl surface groups. Both composites were used as sorbents for Cr(VI) removal from aqueous media at pH ꞊ 2. In order to test the stability and durability of the sorbents, the samples were subjected to alkaline extreme conditions (pH ꞊ 10) at different times and after that tested again for Cr(VI) removal. The bi- functionalized MCM-41 retains its Cr(VI) elimination capacity unchanged after 16 h of alkaline treatment, while the aminopropyl-MCM-41 sample suffer a drop of about 30%. The fresh and alkaline treated samples were characterized by X ray diffraction at low angles, nitrogen sorption at 77 K, Fourier transform infrared, Thermal analysis. The presence of the methyl moieties increases the hydrophobicity of the composite’s surface, which inhibit the approaching of the water molecules avoiding the hydrolysis of Si–O–Si bonds of the MCM-41 pores walls. Besides, this protective effect is reflected in the textural properties changes before and after alkaline treatments: while the specific surface area of aminopropyl-MCM-41 goes from an initial value of 793 to 495 m2 g
.
description Fil: Martin, Pedro Pablo. Universidad Nacional de Río Negro. Centro de Investigaciones y Transferencia. Río Negro, Argentina.
publishDate 2020
dc.date.none.fl_str_mv 2020-05-25
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv Pedro, Martin., Matías, Rafti., Sergio, Marchetti., Nicolas, Fellenz. (2020) MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media. Solid State Sciences; 106; 106300.
1293-2558
https://www.sciencedirect.com/science/article/pii/S1293255819314797?via%3Dihub#!
http://rid.unrn.edu.ar/handle/20.500.12049/6800
https://doi.org/10.1016/j.solidstatesciences.2020.106300
identifier_str_mv Pedro, Martin., Matías, Rafti., Sergio, Marchetti., Nicolas, Fellenz. (2020) MCM-41-based composite with enhanced stability for Cr(VI) removal from aqueous media. Solid State Sciences; 106; 106300.
1293-2558
url https://www.sciencedirect.com/science/article/pii/S1293255819314797?via%3Dihub#!
http://rid.unrn.edu.ar/handle/20.500.12049/6800
https://doi.org/10.1016/j.solidstatesciences.2020.106300
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.sciencedirect.com/journal/solid-state-sciences
106
Solid State Sciences
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RID-UNRN (UNRN)
instname:Universidad Nacional de Río Negro
reponame_str RID-UNRN (UNRN)
collection RID-UNRN (UNRN)
instname_str Universidad Nacional de Río Negro
repository.name.fl_str_mv RID-UNRN (UNRN) - Universidad Nacional de Río Negro
repository.mail.fl_str_mv rid@unrn.edu.ar
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score 12.712165

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