Effect of humic acids on the adsorption of paraquat by goethite

Autores
Brigante, Maximiliano Eduardo; Zanini, Graciela Pilar; Avena, Marcelo Javier
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The adsorption of the herbicide paraquat (PQ2+) on goethite and on the binary system humic acid-goethite has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration and temperature. The results were completed with capillary electrophoresis (CE) in order to measure the binding isotherm between PQ2+ and humic acid (HA) molecules in solution. PQ2+ adsorption is negligible on the bare goethite surface but important on the HA-goethite adsorbent. In this last case, the adsorption increases by increasing pH and decreasing electrolyte concentration. There are no significant effects of temperature on the adsorption. The adsorption takes place by direct binding of PQ2+ to adsorbed HA molecules leading to the formation of surface species of the type goethite-HA-PQ2+. The results are consistent with a mechanism where PQ2+ binds negatively charged groups of HA (carboxylates and phenolates) forming ionic pairs or outer-sphere complexes. Since goethite in nature usually contains adsorbed HA molecules, it may act as a good adsorbent for cationic herbicides. This will not only benefit the deactivation of the herbicides but also reduce their leaching and transport through groundwater. © 2010 Elsevier B.V.
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: Zanini, Graciela Pilar. 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
Adsorption
Capillary Electrophoresis
Goethite
Humic Acid
Paraquat
Surface Complexes
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:11336/64033
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Effect of humic acids on the adsorption of paraquat by goethiteBrigante, Maximiliano EduardoZanini, Graciela PilarAvena, Marcelo JavierAdsorptionCapillary ElectrophoresisGoethiteHumic AcidParaquatSurface Complexeshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The adsorption of the herbicide paraquat (PQ2+) on goethite and on the binary system humic acid-goethite has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration and temperature. The results were completed with capillary electrophoresis (CE) in order to measure the binding isotherm between PQ2+ and humic acid (HA) molecules in solution. PQ2+ adsorption is negligible on the bare goethite surface but important on the HA-goethite adsorbent. In this last case, the adsorption increases by increasing pH and decreasing electrolyte concentration. There are no significant effects of temperature on the adsorption. The adsorption takes place by direct binding of PQ2+ to adsorbed HA molecules leading to the formation of surface species of the type goethite-HA-PQ2+. The results are consistent with a mechanism where PQ2+ binds negatively charged groups of HA (carboxylates and phenolates) forming ionic pairs or outer-sphere complexes. Since goethite in nature usually contains adsorbed HA molecules, it may act as a good adsorbent for cationic herbicides. This will not only benefit the deactivation of the herbicides but also reduce their leaching and transport through groundwater. © 2010 Elsevier B.V.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: Zanini, Graciela Pilar. 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 Science2010-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/64033Brigante, Maximiliano Eduardo; Zanini, Graciela Pilar; Avena, Marcelo Javier; Effect of humic acids on the adsorption of paraquat by goethite; Elsevier Science; Journal of Hazardous Materials; 184; 1-3; 12-2010; 241-2470304-3894CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jhazmat.2010.08.028info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304389410010447info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:03:27Zoai:ri.conicet.gov.ar:11336/64033instacron: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:34982025-09-10 13:03:27.508CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Effect of humic acids on the adsorption of paraquat by goethite
title Effect of humic acids on the adsorption of paraquat by goethite
spellingShingle Effect of humic acids on the adsorption of paraquat by goethite
Brigante, Maximiliano Eduardo
Adsorption
Capillary Electrophoresis
Goethite
Humic Acid
Paraquat
Surface Complexes
title_short Effect of humic acids on the adsorption of paraquat by goethite
title_full Effect of humic acids on the adsorption of paraquat by goethite
title_fullStr Effect of humic acids on the adsorption of paraquat by goethite
title_full_unstemmed Effect of humic acids on the adsorption of paraquat by goethite
title_sort Effect of humic acids on the adsorption of paraquat by goethite
dc.creator.none.fl_str_mv Brigante, Maximiliano Eduardo
Zanini, Graciela Pilar
Avena, Marcelo Javier
author Brigante, Maximiliano Eduardo
author_facet Brigante, Maximiliano Eduardo
Zanini, Graciela Pilar
Avena, Marcelo Javier
author_role author
author2 Zanini, Graciela Pilar
Avena, Marcelo Javier
author2_role author
author
dc.subject.none.fl_str_mv Adsorption
Capillary Electrophoresis
Goethite
Humic Acid
Paraquat
Surface Complexes
topic Adsorption
Capillary Electrophoresis
Goethite
Humic Acid
Paraquat
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 The adsorption of the herbicide paraquat (PQ2+) on goethite and on the binary system humic acid-goethite has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration and temperature. The results were completed with capillary electrophoresis (CE) in order to measure the binding isotherm between PQ2+ and humic acid (HA) molecules in solution. PQ2+ adsorption is negligible on the bare goethite surface but important on the HA-goethite adsorbent. In this last case, the adsorption increases by increasing pH and decreasing electrolyte concentration. There are no significant effects of temperature on the adsorption. The adsorption takes place by direct binding of PQ2+ to adsorbed HA molecules leading to the formation of surface species of the type goethite-HA-PQ2+. The results are consistent with a mechanism where PQ2+ binds negatively charged groups of HA (carboxylates and phenolates) forming ionic pairs or outer-sphere complexes. Since goethite in nature usually contains adsorbed HA molecules, it may act as a good adsorbent for cationic herbicides. This will not only benefit the deactivation of the herbicides but also reduce their leaching and transport through groundwater. © 2010 Elsevier B.V.
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: Zanini, Graciela Pilar. 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 The adsorption of the herbicide paraquat (PQ2+) on goethite and on the binary system humic acid-goethite has been studied in batch experiments by performing adsorption isotherms under different conditions of pH, supporting electrolyte concentration and temperature. The results were completed with capillary electrophoresis (CE) in order to measure the binding isotherm between PQ2+ and humic acid (HA) molecules in solution. PQ2+ adsorption is negligible on the bare goethite surface but important on the HA-goethite adsorbent. In this last case, the adsorption increases by increasing pH and decreasing electrolyte concentration. There are no significant effects of temperature on the adsorption. The adsorption takes place by direct binding of PQ2+ to adsorbed HA molecules leading to the formation of surface species of the type goethite-HA-PQ2+. The results are consistent with a mechanism where PQ2+ binds negatively charged groups of HA (carboxylates and phenolates) forming ionic pairs or outer-sphere complexes. Since goethite in nature usually contains adsorbed HA molecules, it may act as a good adsorbent for cationic herbicides. This will not only benefit the deactivation of the herbicides but also reduce their leaching and transport through groundwater. © 2010 Elsevier B.V.
publishDate 2010
dc.date.none.fl_str_mv 2010-12
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/11336/64033
Brigante, Maximiliano Eduardo; Zanini, Graciela Pilar; Avena, Marcelo Javier; Effect of humic acids on the adsorption of paraquat by goethite; Elsevier Science; Journal of Hazardous Materials; 184; 1-3; 12-2010; 241-247
0304-3894
CONICET Digital
CONICET
url http://hdl.handle.net/11336/64033
identifier_str_mv Brigante, Maximiliano Eduardo; Zanini, Graciela Pilar; Avena, Marcelo Javier; Effect of humic acids on the adsorption of paraquat by goethite; Elsevier Science; Journal of Hazardous Materials; 184; 1-3; 12-2010; 241-247
0304-3894
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.jhazmat.2010.08.028
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0304389410010447
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
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 12.993085

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