Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements

Autores
Luengo, Carina Vanesa; Brigante, Maximiliano Eduardo; Antelo, Juan; Avena, Marcelo Javier
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The adsorption kinetics of phosphate on goethite has been studied by batch adsorption experiments and by in situ ATR-IR spectroscopy at different pH, initial phosphate concentrations and stirring rates. Batch adsorption results are very similar to those reported by several authors, and show a rather fast initial adsorption taking place in a few minutes followed by a slower process taking place in days or weeks. The adsorption kinetics could be also monitored by integrating the phosphate signals obtained in ATR-IR experiments, and a very good agreement between both techniques was found. At pH 4.5 two surface complexes, the bidentate nonprotonated (FeO)2PO2 and the bidentate protonated (FeO)2(OH)PO complexes, are formed at the surface. There are small changes in the relative concentrations of these species as the reaction proceeds, and they seem to evolve in time rather independently. At pH 7.5 and 9 the dominating surface species is (FeO)2PO2, which is accompanied by an extra unidentified species at low concentration. They also seem to evolve independently as the reaction proceeds. The results are consistent with a mechanism that involve a fast adsorption followed by a slow diffusion into pores, and are not consistent with surface precipitation of iron phosphate.
Fil: Luengo, Carina Vanesa. 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: 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: Antelo, Juan. Consejo Superior de Investigaciones Científicas; España. 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
Materia
ADSORPTION KINETICS
ADSORPTION MECHANISM
OXIDE-WATER INTERFACE
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:11336/95169
Acceder
id CONICETDig_91a03ff6702c8b036a1b9254ec79562c
oai_identifier_str oai:ri.conicet.gov.ar:11336/95169
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurementsLuengo, Carina VanesaBrigante, Maximiliano EduardoAntelo, JuanAvena, Marcelo JavierADSORPTION KINETICSADSORPTION MECHANISMOXIDE-WATER INTERFACESURFACE COMPLEXEShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The adsorption kinetics of phosphate on goethite has been studied by batch adsorption experiments and by in situ ATR-IR spectroscopy at different pH, initial phosphate concentrations and stirring rates. Batch adsorption results are very similar to those reported by several authors, and show a rather fast initial adsorption taking place in a few minutes followed by a slower process taking place in days or weeks. The adsorption kinetics could be also monitored by integrating the phosphate signals obtained in ATR-IR experiments, and a very good agreement between both techniques was found. At pH 4.5 two surface complexes, the bidentate nonprotonated (FeO)2PO2 and the bidentate protonated (FeO)2(OH)PO complexes, are formed at the surface. There are small changes in the relative concentrations of these species as the reaction proceeds, and they seem to evolve in time rather independently. At pH 7.5 and 9 the dominating surface species is (FeO)2PO2, which is accompanied by an extra unidentified species at low concentration. They also seem to evolve independently as the reaction proceeds. The results are consistent with a mechanism that involve a fast adsorption followed by a slow diffusion into pores, and are not consistent with surface precipitation of iron phosphate.Fil: Luengo, Carina Vanesa. 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: 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: Antelo, Juan. Consejo Superior de Investigaciones Científicas; España. 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; ArgentinaAcademic Press Inc Elsevier Science2006-08info: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/11336/95169Luengo, Carina Vanesa; Brigante, Maximiliano Eduardo; Antelo, Juan; Avena, Marcelo Javier; Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements; Academic Press Inc Elsevier Science; Journal of Colloid and Interface Science; 300; 2; 8-2006; 511-5180021-9797CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0021979706002967info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcis.2006.04.015info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:46Zoai:ri.conicet.gov.ar:11336/95169instacron: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 09:33:46.633CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
title Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
spellingShingle Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
Luengo, Carina Vanesa
ADSORPTION KINETICS
ADSORPTION MECHANISM
OXIDE-WATER INTERFACE
SURFACE COMPLEXES
title_short Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
title_full Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
title_fullStr Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
title_full_unstemmed Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
title_sort Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements
dc.creator.none.fl_str_mv Luengo, Carina Vanesa
Brigante, Maximiliano Eduardo
Antelo, Juan
Avena, Marcelo Javier
author Luengo, Carina Vanesa
author_facet Luengo, Carina Vanesa
Brigante, Maximiliano Eduardo
Antelo, Juan
Avena, Marcelo Javier
author_role author
author2 Brigante, Maximiliano Eduardo
Antelo, Juan
Avena, Marcelo Javier
author2_role author
author
author
dc.subject.none.fl_str_mv ADSORPTION KINETICS
ADSORPTION MECHANISM
OXIDE-WATER INTERFACE
SURFACE COMPLEXES
topic ADSORPTION KINETICS
ADSORPTION MECHANISM
OXIDE-WATER INTERFACE
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 kinetics of phosphate on goethite has been studied by batch adsorption experiments and by in situ ATR-IR spectroscopy at different pH, initial phosphate concentrations and stirring rates. Batch adsorption results are very similar to those reported by several authors, and show a rather fast initial adsorption taking place in a few minutes followed by a slower process taking place in days or weeks. The adsorption kinetics could be also monitored by integrating the phosphate signals obtained in ATR-IR experiments, and a very good agreement between both techniques was found. At pH 4.5 two surface complexes, the bidentate nonprotonated (FeO)2PO2 and the bidentate protonated (FeO)2(OH)PO complexes, are formed at the surface. There are small changes in the relative concentrations of these species as the reaction proceeds, and they seem to evolve in time rather independently. At pH 7.5 and 9 the dominating surface species is (FeO)2PO2, which is accompanied by an extra unidentified species at low concentration. They also seem to evolve independently as the reaction proceeds. The results are consistent with a mechanism that involve a fast adsorption followed by a slow diffusion into pores, and are not consistent with surface precipitation of iron phosphate.
Fil: Luengo, Carina Vanesa. 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: 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: Antelo, Juan. Consejo Superior de Investigaciones Científicas; España. 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
description The adsorption kinetics of phosphate on goethite has been studied by batch adsorption experiments and by in situ ATR-IR spectroscopy at different pH, initial phosphate concentrations and stirring rates. Batch adsorption results are very similar to those reported by several authors, and show a rather fast initial adsorption taking place in a few minutes followed by a slower process taking place in days or weeks. The adsorption kinetics could be also monitored by integrating the phosphate signals obtained in ATR-IR experiments, and a very good agreement between both techniques was found. At pH 4.5 two surface complexes, the bidentate nonprotonated (FeO)2PO2 and the bidentate protonated (FeO)2(OH)PO complexes, are formed at the surface. There are small changes in the relative concentrations of these species as the reaction proceeds, and they seem to evolve in time rather independently. At pH 7.5 and 9 the dominating surface species is (FeO)2PO2, which is accompanied by an extra unidentified species at low concentration. They also seem to evolve independently as the reaction proceeds. The results are consistent with a mechanism that involve a fast adsorption followed by a slow diffusion into pores, and are not consistent with surface precipitation of iron phosphate.
publishDate 2006
dc.date.none.fl_str_mv 2006-08
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/11336/95169
Luengo, Carina Vanesa; Brigante, Maximiliano Eduardo; Antelo, Juan; Avena, Marcelo Javier; Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements; Academic Press Inc Elsevier Science; Journal of Colloid and Interface Science; 300; 2; 8-2006; 511-518
0021-9797
CONICET Digital
CONICET
url http://hdl.handle.net/11336/95169
identifier_str_mv Luengo, Carina Vanesa; Brigante, Maximiliano Eduardo; Antelo, Juan; Avena, Marcelo Javier; Kinetics of phosphate adsorption on goethite: Comparing batch adsorption and ATR-IR measurements; Academic Press Inc Elsevier Science; Journal of Colloid and Interface Science; 300; 2; 8-2006; 511-518
0021-9797
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0021979706002967
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcis.2006.04.015
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 Academic Press Inc Elsevier Science
publisher.none.fl_str_mv Academic Press Inc 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
_version_ 1844613040414130176
score 13.070432

Publicaciones similares