Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid

Autores
Perassi, Ileana; Borgnino Bianchi, Laura Carolina
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The adsorption of phosphate onto CaCO3–montmorillonite (calcite–M) was studied in a series of batch experiments and in a wide range of phosphate concentration (5–160 μM). Our results show that phosphate adsorption is dependent on pH; adsorption increases as pH decreases. Phosphate initial concentration and ionic strength also affects the process of phosphate removal, prevailing adsorption for phosphate concentration lower than 100 μM, while surface precipitation of HAP and carbonate apatite is favored at high phosphate concentration and ionic strength. Raman spectroscopy shows both the transition between adsorption and surface precipitation and the Ca–P compound formed. The presence of a competitor, such as humic acid, reduces phosphate adsorption and reveals that both ions are in competition for surface sites. Depending on the order that the adsorbates are added, higher reduction occurs when humic acid is added first. In contrast, when phosphate is added first, the adsorption increases significantly with respect to the values obtained in the absence of humic acid. Humic acid may prevent precipitation of Ca–P compounds, leaving more phosphate available in solution to be adsorbed.
Fil: Perassi, Ileana. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Materia
Phospahte Adsortpion
Calcite-Montmorillonite
Raman Spectroscopy
Humic Acid
Competition
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:11336/31887
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acidPerassi, IleanaBorgnino Bianchi, Laura CarolinaPhospahte AdsortpionCalcite-MontmorilloniteRaman SpectroscopyHumic AcidCompetitionhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The adsorption of phosphate onto CaCO3–montmorillonite (calcite–M) was studied in a series of batch experiments and in a wide range of phosphate concentration (5–160 μM). Our results show that phosphate adsorption is dependent on pH; adsorption increases as pH decreases. Phosphate initial concentration and ionic strength also affects the process of phosphate removal, prevailing adsorption for phosphate concentration lower than 100 μM, while surface precipitation of HAP and carbonate apatite is favored at high phosphate concentration and ionic strength. Raman spectroscopy shows both the transition between adsorption and surface precipitation and the Ca–P compound formed. The presence of a competitor, such as humic acid, reduces phosphate adsorption and reveals that both ions are in competition for surface sites. Depending on the order that the adsorbates are added, higher reduction occurs when humic acid is added first. In contrast, when phosphate is added first, the adsorption increases significantly with respect to the values obtained in the absence of humic acid. Humic acid may prevent precipitation of Ca–P compounds, leaving more phosphate available in solution to be adsorbed.Fil: Perassi, Ileana. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; ArgentinaFil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; ArgentinaElsevier Science2014-06info: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/11336/31887Borgnino Bianchi, Laura Carolina; Perassi, Ileana; Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid; Elsevier Science; Geoderma; 232-234; 6-2014; 600-6080016-7061CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.geoderma.2014.06.017info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S001670611400247Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:42:12Zoai:ri.conicet.gov.ar:11336/31887instacron: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 10:42:12.483CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
title Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
spellingShingle Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
Perassi, Ileana
Phospahte Adsortpion
Calcite-Montmorillonite
Raman Spectroscopy
Humic Acid
Competition
title_short Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
title_full Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
title_fullStr Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
title_full_unstemmed Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
title_sort Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid
dc.creator.none.fl_str_mv Perassi, Ileana
Borgnino Bianchi, Laura Carolina
author Perassi, Ileana
author_facet Perassi, Ileana
Borgnino Bianchi, Laura Carolina
author_role author
author2 Borgnino Bianchi, Laura Carolina
author2_role author
dc.subject.none.fl_str_mv Phospahte Adsortpion
Calcite-Montmorillonite
Raman Spectroscopy
Humic Acid
Competition
topic Phospahte Adsortpion
Calcite-Montmorillonite
Raman Spectroscopy
Humic Acid
Competition
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 phosphate onto CaCO3–montmorillonite (calcite–M) was studied in a series of batch experiments and in a wide range of phosphate concentration (5–160 μM). Our results show that phosphate adsorption is dependent on pH; adsorption increases as pH decreases. Phosphate initial concentration and ionic strength also affects the process of phosphate removal, prevailing adsorption for phosphate concentration lower than 100 μM, while surface precipitation of HAP and carbonate apatite is favored at high phosphate concentration and ionic strength. Raman spectroscopy shows both the transition between adsorption and surface precipitation and the Ca–P compound formed. The presence of a competitor, such as humic acid, reduces phosphate adsorption and reveals that both ions are in competition for surface sites. Depending on the order that the adsorbates are added, higher reduction occurs when humic acid is added first. In contrast, when phosphate is added first, the adsorption increases significantly with respect to the values obtained in the absence of humic acid. Humic acid may prevent precipitation of Ca–P compounds, leaving more phosphate available in solution to be adsorbed.
Fil: Perassi, Ileana. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
Fil: Borgnino Bianchi, Laura Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Físico-química de Córdoba. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Instituto de Investigaciones en Físico-química de Córdoba; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Químicas. Departamento de Fisicoquímica; Argentina
description The adsorption of phosphate onto CaCO3–montmorillonite (calcite–M) was studied in a series of batch experiments and in a wide range of phosphate concentration (5–160 μM). Our results show that phosphate adsorption is dependent on pH; adsorption increases as pH decreases. Phosphate initial concentration and ionic strength also affects the process of phosphate removal, prevailing adsorption for phosphate concentration lower than 100 μM, while surface precipitation of HAP and carbonate apatite is favored at high phosphate concentration and ionic strength. Raman spectroscopy shows both the transition between adsorption and surface precipitation and the Ca–P compound formed. The presence of a competitor, such as humic acid, reduces phosphate adsorption and reveals that both ions are in competition for surface sites. Depending on the order that the adsorbates are added, higher reduction occurs when humic acid is added first. In contrast, when phosphate is added first, the adsorption increases significantly with respect to the values obtained in the absence of humic acid. Humic acid may prevent precipitation of Ca–P compounds, leaving more phosphate available in solution to be adsorbed.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
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/11336/31887
Borgnino Bianchi, Laura Carolina; Perassi, Ileana; Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid; Elsevier Science; Geoderma; 232-234; 6-2014; 600-608
0016-7061
CONICET Digital
CONICET
url http://hdl.handle.net/11336/31887
identifier_str_mv Borgnino Bianchi, Laura Carolina; Perassi, Ileana; Adsorption and surface precipitation of phosphate onto CaCO3–montmorillonite: effect of pH, ionic strength and competition with humic acid; Elsevier Science; Geoderma; 232-234; 6-2014; 600-608
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.2014.06.017
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S001670611400247X
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 13.069144

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