Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution

Autores
Brigante, Maximiliano Eduardo; Avena, Marcelo Javier
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A hexagonal mesoporous silica (SiO2) was hydrothermally synthesized in alkaline media by using mixed cationic cetyltrimethylammonium tosylate-non-ionic Pluronic F68 surfactants as template. After characterization by commonly used techniques, the solid was evaluated as adsorbent for the remotion of dicationic herbicide paraquat (PQ2+). The adsorption of the PQ2+ on SiO2 has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration, and temperature. Adsorption kinetic on the studied material has also been carried out and discussed. The adsorption of PQ2+ on the studied material is strongly dependent on pH, increasing as pH increases. The adsorption seems to take place by direct binding of the cationic herbicide to SiO2 active sites (e.g. surface and/or inside the mesopores) through electrostatic interactions and outer-sphere (or ionic pair) complexes formations, as deduce from adsorption experiments at several ionic strengths and temperatures. The analysis of thermodynamic parameters suggests that the adsorption of PQ2+ on the studied solid is exothermic and spontaneous in nature. Even after four regeneration cycles through acid washing, the mesoporous material has still a removal efficiency of ca. 75%, showing a promising application for the treatment of wastewater containing paraquat ions.
Fil: Brigante, Maximiliano Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Avena, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Materia
Mcm-41
Paraquat Adsorption
Surface Complexes
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/30325
Acceder
id CONICETDig_0cf814ee1fd9c3d6f31d2c66b5c58826
oai_identifier_str oai:ri.conicet.gov.ar:11336/30325
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solutionBrigante, Maximiliano EduardoAvena, Marcelo JavierMcm-41Paraquat AdsorptionSurface Complexeshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1A hexagonal mesoporous silica (SiO2) was hydrothermally synthesized in alkaline media by using mixed cationic cetyltrimethylammonium tosylate-non-ionic Pluronic F68 surfactants as template. After characterization by commonly used techniques, the solid was evaluated as adsorbent for the remotion of dicationic herbicide paraquat (PQ2+). The adsorption of the PQ2+ on SiO2 has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration, and temperature. Adsorption kinetic on the studied material has also been carried out and discussed. The adsorption of PQ2+ on the studied material is strongly dependent on pH, increasing as pH increases. The adsorption seems to take place by direct binding of the cationic herbicide to SiO2 active sites (e.g. surface and/or inside the mesopores) through electrostatic interactions and outer-sphere (or ionic pair) complexes formations, as deduce from adsorption experiments at several ionic strengths and temperatures. The analysis of thermodynamic parameters suggests that the adsorption of PQ2+ on the studied solid is exothermic and spontaneous in nature. Even after four regeneration cycles through acid washing, the mesoporous material has still a removal efficiency of ca. 75%, showing a promising application for the treatment of wastewater containing paraquat ions.Fil: Brigante, Maximiliano Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Avena, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaElsevier Science Inc2014-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/30325Brigante, Maximiliano Eduardo; Avena, Marcelo Javier; Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution; Elsevier Science Inc; Microporous and Mesoporous Materials; 191; 3-2014; 1-91387-1811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.micromeso.2014.02.035info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1387181114001061info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:00:59Zoai:ri.conicet.gov.ar:11336/30325instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:00:59.446CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
title Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
spellingShingle Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
Brigante, Maximiliano Eduardo
Mcm-41
Paraquat Adsorption
Surface Complexes
title_short Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
title_full Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
title_fullStr Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
title_full_unstemmed Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
title_sort Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution
dc.creator.none.fl_str_mv Brigante, Maximiliano Eduardo
Avena, Marcelo Javier
author Brigante, Maximiliano Eduardo
author_facet Brigante, Maximiliano Eduardo
Avena, Marcelo Javier
author_role author
author2 Avena, Marcelo Javier
author2_role author
dc.subject.none.fl_str_mv Mcm-41
Paraquat Adsorption
Surface Complexes
topic Mcm-41
Paraquat Adsorption
Surface Complexes
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A hexagonal mesoporous silica (SiO2) was hydrothermally synthesized in alkaline media by using mixed cationic cetyltrimethylammonium tosylate-non-ionic Pluronic F68 surfactants as template. After characterization by commonly used techniques, the solid was evaluated as adsorbent for the remotion of dicationic herbicide paraquat (PQ2+). The adsorption of the PQ2+ on SiO2 has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration, and temperature. Adsorption kinetic on the studied material has also been carried out and discussed. The adsorption of PQ2+ on the studied material is strongly dependent on pH, increasing as pH increases. The adsorption seems to take place by direct binding of the cationic herbicide to SiO2 active sites (e.g. surface and/or inside the mesopores) through electrostatic interactions and outer-sphere (or ionic pair) complexes formations, as deduce from adsorption experiments at several ionic strengths and temperatures. The analysis of thermodynamic parameters suggests that the adsorption of PQ2+ on the studied solid is exothermic and spontaneous in nature. Even after four regeneration cycles through acid washing, the mesoporous material has still a removal efficiency of ca. 75%, showing a promising application for the treatment of wastewater containing paraquat ions.
Fil: Brigante, Maximiliano Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Avena, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
description A hexagonal mesoporous silica (SiO2) was hydrothermally synthesized in alkaline media by using mixed cationic cetyltrimethylammonium tosylate-non-ionic Pluronic F68 surfactants as template. After characterization by commonly used techniques, the solid was evaluated as adsorbent for the remotion of dicationic herbicide paraquat (PQ2+). The adsorption of the PQ2+ on SiO2 has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration, and temperature. Adsorption kinetic on the studied material has also been carried out and discussed. The adsorption of PQ2+ on the studied material is strongly dependent on pH, increasing as pH increases. The adsorption seems to take place by direct binding of the cationic herbicide to SiO2 active sites (e.g. surface and/or inside the mesopores) through electrostatic interactions and outer-sphere (or ionic pair) complexes formations, as deduce from adsorption experiments at several ionic strengths and temperatures. The analysis of thermodynamic parameters suggests that the adsorption of PQ2+ on the studied solid is exothermic and spontaneous in nature. Even after four regeneration cycles through acid washing, the mesoporous material has still a removal efficiency of ca. 75%, showing a promising application for the treatment of wastewater containing paraquat ions.
publishDate 2014
dc.date.none.fl_str_mv 2014-03
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 http://hdl.handle.net/11336/30325
Brigante, Maximiliano Eduardo; Avena, Marcelo Javier; Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution; Elsevier Science Inc; Microporous and Mesoporous Materials; 191; 3-2014; 1-9
1387-1811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/30325
identifier_str_mv Brigante, Maximiliano Eduardo; Avena, Marcelo Javier; Synthesis, characterization and application of a hexagonal mesoporous silica for pesticide removal from aqueous solution; Elsevier Science Inc; Microporous and Mesoporous Materials; 191; 3-2014; 1-9
1387-1811
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.micromeso.2014.02.035
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S1387181114001061
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Inc
publisher.none.fl_str_mv Elsevier Science Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844613798207422464
score 13.070432

Publicaciones similares