Tetracycline adsorption on montmorillonite: pH and ionic strength effects

Autores
Parolo, Maria Eugenia; Savini, Monica Claudia; Valles, Jorge Manuel; Baschini, Miria Teresita; Avena, Marcelo Javier
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The adsorption of tetracycline (TC) on a Patagonian montmorillonite is studied as a function of pH, ionic strength and TC concentration by using X-ray diffraction, UV-Visible spectroscopy, ATR-FTIR spectroscopy, batch experiments and adsorption modeling. X-ray diffraction reveals that TC species can intercalate into the interlayer space of montmorillonite as deduced from the change in the basal spacing from 12.6 Å to 19.5 Å, in the absence or presence of TC respectively. UV-Visible and ATR-FTIR spectroscopies show that the corresponding spectra of TC change upon adsorption, suggesting important montmorillonite-TC interactions in the adsorbed state. Batch experiments, on the other hand, reveal that there is an important adsorption of TC in a wide range of pH. Since at low pH (pH < 4) the prevailing species of TC is a cation with a net charge of + 1, the adsorption is rather high at this pH, reaching nearly the cation exchange capacity of the mineral. The adsorption then decreases as the pH is increased and eventually becomes negligible at pH 11. Experiments and modeling suggest that not only the cationic species but also the neutral and monoanionic species of TC adsorb on the negatively charged montmorillonite surface. Although there is a significant electrostatic interaction between TC and montmorillonite, a rather strong non-electrostatic interaction also exists. At all pH values TC species compete with sodium ions for surface sites, and thus there is an important effect of ionic strength on the adsorption. © 2007 Elsevier B.V. All rights reserved.
Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Savini, Monica Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Valles, Jorge Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Baschini, Miria Teresita. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; 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
Atr-Ftir
Montmorillonite
Tetracyclines
Uv-Visible Spectroscopy
Xrd
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:11336/66052
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/66052
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Tetracycline adsorption on montmorillonite: pH and ionic strength effectsParolo, Maria EugeniaSavini, Monica ClaudiaValles, Jorge ManuelBaschini, Miria TeresitaAvena, Marcelo JavierAdsorptionAtr-FtirMontmorilloniteTetracyclinesUv-Visible SpectroscopyXrdhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The adsorption of tetracycline (TC) on a Patagonian montmorillonite is studied as a function of pH, ionic strength and TC concentration by using X-ray diffraction, UV-Visible spectroscopy, ATR-FTIR spectroscopy, batch experiments and adsorption modeling. X-ray diffraction reveals that TC species can intercalate into the interlayer space of montmorillonite as deduced from the change in the basal spacing from 12.6 Å to 19.5 Å, in the absence or presence of TC respectively. UV-Visible and ATR-FTIR spectroscopies show that the corresponding spectra of TC change upon adsorption, suggesting important montmorillonite-TC interactions in the adsorbed state. Batch experiments, on the other hand, reveal that there is an important adsorption of TC in a wide range of pH. Since at low pH (pH < 4) the prevailing species of TC is a cation with a net charge of + 1, the adsorption is rather high at this pH, reaching nearly the cation exchange capacity of the mineral. The adsorption then decreases as the pH is increased and eventually becomes negligible at pH 11. Experiments and modeling suggest that not only the cationic species but also the neutral and monoanionic species of TC adsorb on the negatively charged montmorillonite surface. Although there is a significant electrostatic interaction between TC and montmorillonite, a rather strong non-electrostatic interaction also exists. At all pH values TC species compete with sodium ions for surface sites, and thus there is an important effect of ionic strength on the adsorption. © 2007 Elsevier B.V. All rights reserved.Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; ArgentinaFil: Savini, Monica Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; ArgentinaFil: Valles, Jorge Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; ArgentinaFil: Baschini, Miria Teresita. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; 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 Science2008-06info: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/11336/66052Parolo, Maria Eugenia; Savini, Monica Claudia; Valles, Jorge Manuel; Baschini, Miria Teresita; Avena, Marcelo Javier; Tetracycline adsorption on montmorillonite: pH and ionic strength effects; Elsevier Science; Applied Clay Science; 40; 1-4; 6-2008; 179-1860169-1317CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2007.08.003info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169131707001469info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-10T13:19:08Zoai:ri.conicet.gov.ar:11336/66052instacron: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 13:19:09.177CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Tetracycline adsorption on montmorillonite: pH and ionic strength effects
title Tetracycline adsorption on montmorillonite: pH and ionic strength effects
spellingShingle Tetracycline adsorption on montmorillonite: pH and ionic strength effects
Parolo, Maria Eugenia
Adsorption
Atr-Ftir
Montmorillonite
Tetracyclines
Uv-Visible Spectroscopy
Xrd
title_short Tetracycline adsorption on montmorillonite: pH and ionic strength effects
title_full Tetracycline adsorption on montmorillonite: pH and ionic strength effects
title_fullStr Tetracycline adsorption on montmorillonite: pH and ionic strength effects
title_full_unstemmed Tetracycline adsorption on montmorillonite: pH and ionic strength effects
title_sort Tetracycline adsorption on montmorillonite: pH and ionic strength effects
dc.creator.none.fl_str_mv Parolo, Maria Eugenia
Savini, Monica Claudia
Valles, Jorge Manuel
Baschini, Miria Teresita
Avena, Marcelo Javier
author Parolo, Maria Eugenia
author_facet Parolo, Maria Eugenia
Savini, Monica Claudia
Valles, Jorge Manuel
Baschini, Miria Teresita
Avena, Marcelo Javier
author_role author
author2 Savini, Monica Claudia
Valles, Jorge Manuel
Baschini, Miria Teresita
Avena, Marcelo Javier
author2_role author
author
author
author
dc.subject.none.fl_str_mv Adsorption
Atr-Ftir
Montmorillonite
Tetracyclines
Uv-Visible Spectroscopy
Xrd
topic Adsorption
Atr-Ftir
Montmorillonite
Tetracyclines
Uv-Visible Spectroscopy
Xrd
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 tetracycline (TC) on a Patagonian montmorillonite is studied as a function of pH, ionic strength and TC concentration by using X-ray diffraction, UV-Visible spectroscopy, ATR-FTIR spectroscopy, batch experiments and adsorption modeling. X-ray diffraction reveals that TC species can intercalate into the interlayer space of montmorillonite as deduced from the change in the basal spacing from 12.6 Å to 19.5 Å, in the absence or presence of TC respectively. UV-Visible and ATR-FTIR spectroscopies show that the corresponding spectra of TC change upon adsorption, suggesting important montmorillonite-TC interactions in the adsorbed state. Batch experiments, on the other hand, reveal that there is an important adsorption of TC in a wide range of pH. Since at low pH (pH < 4) the prevailing species of TC is a cation with a net charge of + 1, the adsorption is rather high at this pH, reaching nearly the cation exchange capacity of the mineral. The adsorption then decreases as the pH is increased and eventually becomes negligible at pH 11. Experiments and modeling suggest that not only the cationic species but also the neutral and monoanionic species of TC adsorb on the negatively charged montmorillonite surface. Although there is a significant electrostatic interaction between TC and montmorillonite, a rather strong non-electrostatic interaction also exists. At all pH values TC species compete with sodium ions for surface sites, and thus there is an important effect of ionic strength on the adsorption. © 2007 Elsevier B.V. All rights reserved.
Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Savini, Monica Claudia. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Valles, Jorge Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; Argentina
Fil: Baschini, Miria Teresita. Universidad Nacional del Comahue. Facultad de Ingeniería. Departamento de Química; 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 tetracycline (TC) on a Patagonian montmorillonite is studied as a function of pH, ionic strength and TC concentration by using X-ray diffraction, UV-Visible spectroscopy, ATR-FTIR spectroscopy, batch experiments and adsorption modeling. X-ray diffraction reveals that TC species can intercalate into the interlayer space of montmorillonite as deduced from the change in the basal spacing from 12.6 Å to 19.5 Å, in the absence or presence of TC respectively. UV-Visible and ATR-FTIR spectroscopies show that the corresponding spectra of TC change upon adsorption, suggesting important montmorillonite-TC interactions in the adsorbed state. Batch experiments, on the other hand, reveal that there is an important adsorption of TC in a wide range of pH. Since at low pH (pH < 4) the prevailing species of TC is a cation with a net charge of + 1, the adsorption is rather high at this pH, reaching nearly the cation exchange capacity of the mineral. The adsorption then decreases as the pH is increased and eventually becomes negligible at pH 11. Experiments and modeling suggest that not only the cationic species but also the neutral and monoanionic species of TC adsorb on the negatively charged montmorillonite surface. Although there is a significant electrostatic interaction between TC and montmorillonite, a rather strong non-electrostatic interaction also exists. At all pH values TC species compete with sodium ions for surface sites, and thus there is an important effect of ionic strength on the adsorption. © 2007 Elsevier B.V. All rights reserved.
publishDate 2008
dc.date.none.fl_str_mv 2008-06
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/11336/66052
Parolo, Maria Eugenia; Savini, Monica Claudia; Valles, Jorge Manuel; Baschini, Miria Teresita; Avena, Marcelo Javier; Tetracycline adsorption on montmorillonite: pH and ionic strength effects; Elsevier Science; Applied Clay Science; 40; 1-4; 6-2008; 179-186
0169-1317
CONICET Digital
CONICET
url http://hdl.handle.net/11336/66052
identifier_str_mv Parolo, Maria Eugenia; Savini, Monica Claudia; Valles, Jorge Manuel; Baschini, Miria Teresita; Avena, Marcelo Javier; Tetracycline adsorption on montmorillonite: pH and ionic strength effects; Elsevier Science; Applied Clay Science; 40; 1-4; 6-2008; 179-186
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.2007.08.003
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169131707001469
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 12.48226

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