Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate

Autores
Antelo, J.; Arce, F.; Avena, Marcelo Javier; Fiol, S.; López, R.; Macías, F.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In order to be able to make predictions about the bioavailability and transport of contaminants and nutrients in soils, detailed knowledge is required about the adsorption of natural organic matter on the surface of oxides, as well as the processes of competition with the different ions present in the soil. With this aim, experiments investigating the adsorption of a soil humic acid (SHA) on goethite were carried out at pH 4.5, 7.0 and 10.0 and ionic strengths of 0.1 and 0.01 M, and the competition between SHA and phosphate was analysed by performing adsorption isotherms and electrophoresis experiments. Adsorption of SHA was clearly dependent on pH and ionic strength, decreasing with increasing pH or decreasing ionic strength. The results show that SHA and phosphate compete for the goethite surface, since the presence of phosphate decreases the adsorption of SHA and the presence of SHA decreases the adsorption of phosphate. Under certain conditions of pH, a decrease in phosphate adsorption of up to 45% and a decrease of SHA adsorption between 20 and 35% is produced. Furthermore, experiments performed by varying the order of addition of adsorbates to the goethite dispersion suggest that equilibration is attained more quickly when the adsorbates are added simultaneously than when one of the adsorbates is added before the other.
Fil: Antelo, J.. Universidad de Santiago de Compostela; España
Fil: Arce, F.. Universidad de Santiago de Compostela; España
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
Fil: Fiol, S.. Universidad de Santiago de Compostela; España
Fil: López, R.. Universidad de Santiago de Compostela; España
Fil: Macías, F.. Universidad de Santiago de Compostela; España
Materia
COMPETITION
GOETHITE
PHOSPHATE ADSORPTION
SOIL HUMIC ACID
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:11336/95033
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/95033
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphateAntelo, J.Arce, F.Avena, Marcelo JavierFiol, S.López, R.Macías, F.COMPETITIONGOETHITEPHOSPHATE ADSORPTIONSOIL HUMIC ACIDhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In order to be able to make predictions about the bioavailability and transport of contaminants and nutrients in soils, detailed knowledge is required about the adsorption of natural organic matter on the surface of oxides, as well as the processes of competition with the different ions present in the soil. With this aim, experiments investigating the adsorption of a soil humic acid (SHA) on goethite were carried out at pH 4.5, 7.0 and 10.0 and ionic strengths of 0.1 and 0.01 M, and the competition between SHA and phosphate was analysed by performing adsorption isotherms and electrophoresis experiments. Adsorption of SHA was clearly dependent on pH and ionic strength, decreasing with increasing pH or decreasing ionic strength. The results show that SHA and phosphate compete for the goethite surface, since the presence of phosphate decreases the adsorption of SHA and the presence of SHA decreases the adsorption of phosphate. Under certain conditions of pH, a decrease in phosphate adsorption of up to 45% and a decrease of SHA adsorption between 20 and 35% is produced. Furthermore, experiments performed by varying the order of addition of adsorbates to the goethite dispersion suggest that equilibration is attained more quickly when the adsorbates are added simultaneously than when one of the adsorbates is added before the other.Fil: Antelo, J.. Universidad de Santiago de Compostela; EspañaFil: Arce, F.. Universidad de Santiago de Compostela; EspañaFil: 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; ArgentinaFil: Fiol, S.. Universidad de Santiago de Compostela; EspañaFil: López, R.. Universidad de Santiago de Compostela; EspañaFil: Macías, F.. Universidad de Santiago de Compostela; EspañaElsevier Science2007-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/95033Antelo, J.; Arce, F.; Avena, Marcelo Javier; Fiol, S.; López, R.; et al.; Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate; Elsevier Science; Geoderma; 138; 1-2; 2-2007; 12-190016-7061CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2006.10.011info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706106002989info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:36:34Zoai:ri.conicet.gov.ar:11336/95033instacron: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 09:36:34.315CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
title Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
spellingShingle Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
Antelo, J.
COMPETITION
GOETHITE
PHOSPHATE ADSORPTION
SOIL HUMIC ACID
title_short Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
title_full Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
title_fullStr Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
title_full_unstemmed Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
title_sort Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate
dc.creator.none.fl_str_mv Antelo, J.
Arce, F.
Avena, Marcelo Javier
Fiol, S.
López, R.
Macías, F.
author Antelo, J.
author_facet Antelo, J.
Arce, F.
Avena, Marcelo Javier
Fiol, S.
López, R.
Macías, F.
author_role author
author2 Arce, F.
Avena, Marcelo Javier
Fiol, S.
López, R.
Macías, F.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv COMPETITION
GOETHITE
PHOSPHATE ADSORPTION
SOIL HUMIC ACID
topic COMPETITION
GOETHITE
PHOSPHATE ADSORPTION
SOIL HUMIC ACID
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In order to be able to make predictions about the bioavailability and transport of contaminants and nutrients in soils, detailed knowledge is required about the adsorption of natural organic matter on the surface of oxides, as well as the processes of competition with the different ions present in the soil. With this aim, experiments investigating the adsorption of a soil humic acid (SHA) on goethite were carried out at pH 4.5, 7.0 and 10.0 and ionic strengths of 0.1 and 0.01 M, and the competition between SHA and phosphate was analysed by performing adsorption isotherms and electrophoresis experiments. Adsorption of SHA was clearly dependent on pH and ionic strength, decreasing with increasing pH or decreasing ionic strength. The results show that SHA and phosphate compete for the goethite surface, since the presence of phosphate decreases the adsorption of SHA and the presence of SHA decreases the adsorption of phosphate. Under certain conditions of pH, a decrease in phosphate adsorption of up to 45% and a decrease of SHA adsorption between 20 and 35% is produced. Furthermore, experiments performed by varying the order of addition of adsorbates to the goethite dispersion suggest that equilibration is attained more quickly when the adsorbates are added simultaneously than when one of the adsorbates is added before the other.
Fil: Antelo, J.. Universidad de Santiago de Compostela; España
Fil: Arce, F.. Universidad de Santiago de Compostela; España
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
Fil: Fiol, S.. Universidad de Santiago de Compostela; España
Fil: López, R.. Universidad de Santiago de Compostela; España
Fil: Macías, F.. Universidad de Santiago de Compostela; España
description In order to be able to make predictions about the bioavailability and transport of contaminants and nutrients in soils, detailed knowledge is required about the adsorption of natural organic matter on the surface of oxides, as well as the processes of competition with the different ions present in the soil. With this aim, experiments investigating the adsorption of a soil humic acid (SHA) on goethite were carried out at pH 4.5, 7.0 and 10.0 and ionic strengths of 0.1 and 0.01 M, and the competition between SHA and phosphate was analysed by performing adsorption isotherms and electrophoresis experiments. Adsorption of SHA was clearly dependent on pH and ionic strength, decreasing with increasing pH or decreasing ionic strength. The results show that SHA and phosphate compete for the goethite surface, since the presence of phosphate decreases the adsorption of SHA and the presence of SHA decreases the adsorption of phosphate. Under certain conditions of pH, a decrease in phosphate adsorption of up to 45% and a decrease of SHA adsorption between 20 and 35% is produced. Furthermore, experiments performed by varying the order of addition of adsorbates to the goethite dispersion suggest that equilibration is attained more quickly when the adsorbates are added simultaneously than when one of the adsorbates is added before the other.
publishDate 2007
dc.date.none.fl_str_mv 2007-02
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/11336/95033
Antelo, J.; Arce, F.; Avena, Marcelo Javier; Fiol, S.; López, R.; et al.; Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate; Elsevier Science; Geoderma; 138; 1-2; 2-2007; 12-19
0016-7061
CONICET Digital
CONICET
url http://hdl.handle.net/11336/95033
identifier_str_mv Antelo, J.; Arce, F.; Avena, Marcelo Javier; Fiol, S.; López, R.; et al.; Adsorption of a soil humic acid at the surface of goethite and its competitive interaction with phosphate; Elsevier Science; Geoderma; 138; 1-2; 2-2007; 12-19
0016-7061
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.geoderma.2006.10.011
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0016706106002989
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
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 13.069144

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