Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite

Autores
Maqueda, C.; Dos Santos Afonso, María; Morillo, E.; Torres Sanchez, Rosa Maria; Perez Sayago, M.; Undabeytia, T.
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The effects on montmorillonite (Mt) and on sepiolite (Sep) of mechanical (60 and 180 s grinding time) and further thermal treatments (TT) at 500 °C during 24 h, for removing diuron from aqueous solutions were evaluated. The adsorbents and complexes formed were characterised. The specific surface area (SSA), SEM, XRD and zeta potential of the clay mineral samples were determined. The SSA values showed an increase of 50% for ground Mt and a slight decrease for ground Sep. TT reduced SSA by 50% for the Sep samples, but similar values remained for the Mt samples. Both minerals showed a decrease in crystallinity with increasing grinding time and TT. The zeta potential showed an increased of the negative surface charge for the Mt ground samples, but no changes were noticed for the Sep ground samples. The Mt-TT samples showed a slight decrease whilst the Sep samples showed an increase of the negative surface charge in comparison to those without thermal treatment. The adsorption of diuron on Mt was lower than on Sep, and it decreased slightly after 60 and/or 180 s of grinding, despite the larger SSA values. This differences on the adsorption extent were probably due to the increased micropore surface. In contrast, thermal activation caused signifi- cantly increased adsorption, especially for the 180-s ground sample that was inversely correlated with the micropore surface, indicating that diuron was not adsorbed in micropores. Diuron adsorption on Sep was higher than on Mt due to its higher SSA. The adsorption capacity of Sep samples was increased by mechanical treatments (ground and sonicated). Moreover, thermal activation led to additional increases in adsorption probably due to changes in the Sep structure by the loss of OH structural groups leading to a more hydrophobic surface. Diuron adsorption on Mt-TT samples produced an increase in the negative surface charge compared to the original sample, whereas a decrease in the negative surface charge was observed for Sep.
Fil: Maqueda, C.. Consejo Superior de Investigaciones Cientificas; España
Fil: Dos Santos Afonso, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Morillo, E.. Consejo Superior de Investigaciones Cientificas; España
Fil: Torres Sanchez, Rosa Maria. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Centro de Tecnología de Recursos Minerales y Ceramica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Tecnología de Recursos Minerales y Ceramica; Argentina
Fil: Perez Sayago, M.. Consejo Superior de Investigaciones Cientificas; España
Fil: Undabeytia, T.. Consejo Superior de Investigaciones Cientificas; España
Materia
Sepiolite
Montmorillonite
Diuron
Adsorption
Mechanical Treatment
Thermal Treatment
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/24031
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/24031
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Adsorption of diuron on mechanically and thermally treated montmorillonite and sepioliteMaqueda, C.Dos Santos Afonso, MaríaMorillo, E.Torres Sanchez, Rosa MariaPerez Sayago, M.Undabeytia, T.SepioliteMontmorilloniteDiuronAdsorptionMechanical TreatmentThermal Treatmenthttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2The effects on montmorillonite (Mt) and on sepiolite (Sep) of mechanical (60 and 180 s grinding time) and further thermal treatments (TT) at 500 °C during 24 h, for removing diuron from aqueous solutions were evaluated. The adsorbents and complexes formed were characterised. The specific surface area (SSA), SEM, XRD and zeta potential of the clay mineral samples were determined. The SSA values showed an increase of 50% for ground Mt and a slight decrease for ground Sep. TT reduced SSA by 50% for the Sep samples, but similar values remained for the Mt samples. Both minerals showed a decrease in crystallinity with increasing grinding time and TT. The zeta potential showed an increased of the negative surface charge for the Mt ground samples, but no changes were noticed for the Sep ground samples. The Mt-TT samples showed a slight decrease whilst the Sep samples showed an increase of the negative surface charge in comparison to those without thermal treatment. The adsorption of diuron on Mt was lower than on Sep, and it decreased slightly after 60 and/or 180 s of grinding, despite the larger SSA values. This differences on the adsorption extent were probably due to the increased micropore surface. In contrast, thermal activation caused signifi- cantly increased adsorption, especially for the 180-s ground sample that was inversely correlated with the micropore surface, indicating that diuron was not adsorbed in micropores. Diuron adsorption on Sep was higher than on Mt due to its higher SSA. The adsorption capacity of Sep samples was increased by mechanical treatments (ground and sonicated). Moreover, thermal activation led to additional increases in adsorption probably due to changes in the Sep structure by the loss of OH structural groups leading to a more hydrophobic surface. Diuron adsorption on Mt-TT samples produced an increase in the negative surface charge compared to the original sample, whereas a decrease in the negative surface charge was observed for Sep.Fil: Maqueda, C.. Consejo Superior de Investigaciones Cientificas; EspañaFil: Dos Santos Afonso, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Morillo, E.. Consejo Superior de Investigaciones Cientificas; EspañaFil: Torres Sanchez, Rosa Maria. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Centro de Tecnología de Recursos Minerales y Ceramica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Tecnología de Recursos Minerales y Ceramica; ArgentinaFil: Perez Sayago, M.. Consejo Superior de Investigaciones Cientificas; EspañaFil: Undabeytia, T.. Consejo Superior de Investigaciones Cientificas; EspañaElsevier Science2013-01info: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/11336/24031Maqueda, C.; Dos Santos Afonso, María; Morillo, E.; Torres Sanchez, Rosa Maria; Perez Sayago, M.; et al.; Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite; Elsevier Science; Applied Clay Science; 72; 1-2013; 175-1830169-1317CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2012.10.017info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169131712002773info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:42:24Zoai:ri.conicet.gov.ar:11336/24031instacron: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:34982025-10-15 14:42:24.878CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
title Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
spellingShingle Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
Maqueda, C.
Sepiolite
Montmorillonite
Diuron
Adsorption
Mechanical Treatment
Thermal Treatment
title_short Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
title_full Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
title_fullStr Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
title_full_unstemmed Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
title_sort Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite
dc.creator.none.fl_str_mv Maqueda, C.
Dos Santos Afonso, María
Morillo, E.
Torres Sanchez, Rosa Maria
Perez Sayago, M.
Undabeytia, T.
author Maqueda, C.
author_facet Maqueda, C.
Dos Santos Afonso, María
Morillo, E.
Torres Sanchez, Rosa Maria
Perez Sayago, M.
Undabeytia, T.
author_role author
author2 Dos Santos Afonso, María
Morillo, E.
Torres Sanchez, Rosa Maria
Perez Sayago, M.
Undabeytia, T.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Sepiolite
Montmorillonite
Diuron
Adsorption
Mechanical Treatment
Thermal Treatment
topic Sepiolite
Montmorillonite
Diuron
Adsorption
Mechanical Treatment
Thermal Treatment
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The effects on montmorillonite (Mt) and on sepiolite (Sep) of mechanical (60 and 180 s grinding time) and further thermal treatments (TT) at 500 °C during 24 h, for removing diuron from aqueous solutions were evaluated. The adsorbents and complexes formed were characterised. The specific surface area (SSA), SEM, XRD and zeta potential of the clay mineral samples were determined. The SSA values showed an increase of 50% for ground Mt and a slight decrease for ground Sep. TT reduced SSA by 50% for the Sep samples, but similar values remained for the Mt samples. Both minerals showed a decrease in crystallinity with increasing grinding time and TT. The zeta potential showed an increased of the negative surface charge for the Mt ground samples, but no changes were noticed for the Sep ground samples. The Mt-TT samples showed a slight decrease whilst the Sep samples showed an increase of the negative surface charge in comparison to those without thermal treatment. The adsorption of diuron on Mt was lower than on Sep, and it decreased slightly after 60 and/or 180 s of grinding, despite the larger SSA values. This differences on the adsorption extent were probably due to the increased micropore surface. In contrast, thermal activation caused signifi- cantly increased adsorption, especially for the 180-s ground sample that was inversely correlated with the micropore surface, indicating that diuron was not adsorbed in micropores. Diuron adsorption on Sep was higher than on Mt due to its higher SSA. The adsorption capacity of Sep samples was increased by mechanical treatments (ground and sonicated). Moreover, thermal activation led to additional increases in adsorption probably due to changes in the Sep structure by the loss of OH structural groups leading to a more hydrophobic surface. Diuron adsorption on Mt-TT samples produced an increase in the negative surface charge compared to the original sample, whereas a decrease in the negative surface charge was observed for Sep.
Fil: Maqueda, C.. Consejo Superior de Investigaciones Cientificas; España
Fil: Dos Santos Afonso, María. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Morillo, E.. Consejo Superior de Investigaciones Cientificas; España
Fil: Torres Sanchez, Rosa Maria. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Centro de Tecnología de Recursos Minerales y Ceramica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Centro de Tecnología de Recursos Minerales y Ceramica; Argentina
Fil: Perez Sayago, M.. Consejo Superior de Investigaciones Cientificas; España
Fil: Undabeytia, T.. Consejo Superior de Investigaciones Cientificas; España
description The effects on montmorillonite (Mt) and on sepiolite (Sep) of mechanical (60 and 180 s grinding time) and further thermal treatments (TT) at 500 °C during 24 h, for removing diuron from aqueous solutions were evaluated. The adsorbents and complexes formed were characterised. The specific surface area (SSA), SEM, XRD and zeta potential of the clay mineral samples were determined. The SSA values showed an increase of 50% for ground Mt and a slight decrease for ground Sep. TT reduced SSA by 50% for the Sep samples, but similar values remained for the Mt samples. Both minerals showed a decrease in crystallinity with increasing grinding time and TT. The zeta potential showed an increased of the negative surface charge for the Mt ground samples, but no changes were noticed for the Sep ground samples. The Mt-TT samples showed a slight decrease whilst the Sep samples showed an increase of the negative surface charge in comparison to those without thermal treatment. The adsorption of diuron on Mt was lower than on Sep, and it decreased slightly after 60 and/or 180 s of grinding, despite the larger SSA values. This differences on the adsorption extent were probably due to the increased micropore surface. In contrast, thermal activation caused signifi- cantly increased adsorption, especially for the 180-s ground sample that was inversely correlated with the micropore surface, indicating that diuron was not adsorbed in micropores. Diuron adsorption on Sep was higher than on Mt due to its higher SSA. The adsorption capacity of Sep samples was increased by mechanical treatments (ground and sonicated). Moreover, thermal activation led to additional increases in adsorption probably due to changes in the Sep structure by the loss of OH structural groups leading to a more hydrophobic surface. Diuron adsorption on Mt-TT samples produced an increase in the negative surface charge compared to the original sample, whereas a decrease in the negative surface charge was observed for Sep.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
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/11336/24031
Maqueda, C.; Dos Santos Afonso, María; Morillo, E.; Torres Sanchez, Rosa Maria; Perez Sayago, M.; et al.; Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite; Elsevier Science; Applied Clay Science; 72; 1-2013; 175-183
0169-1317
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24031
identifier_str_mv Maqueda, C.; Dos Santos Afonso, María; Morillo, E.; Torres Sanchez, Rosa Maria; Perez Sayago, M.; et al.; Adsorption of diuron on mechanically and thermally treated montmorillonite and sepiolite; Elsevier Science; Applied Clay Science; 72; 1-2013; 175-183
0169-1317
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.clay.2012.10.017
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0169131712002773
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
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score 13.22299

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