Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites

Autores
Parolo, Maria Eugenia; Avena, Marcelo Javier; Savini, Monica Claudia; Baschini, Miria Teresita; Nicotra, Viviana Estela
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The interaction of tetracycline (TC) with a Na+-montmorillonite and a Ca2+-montmorillonite in aqueous media was investigated using a batch technique complemented with X-ray diffraction (XRD) and circular dichroism (CD). The adsorption of TC decreases by increasing the pH in both cases, although Ca2+-montmorillonite is a more effective adsorbent than Na+-montmorillonite in the pH range 6-8.5. In both cases, TC locates in the interlayer spacing, increasing the d 001 basal spacing from nearly 13.7 Å to nearly 22.0 Å. CD data of TC solutions indicates that increasing the pH induces structural changes from the twisted conformation to the extended conformation of the TC molecule. The presence of Ca2+ in the solution enhances this effect in the pH range 6-10.5. Adsorption on Na+-montmorillonite and Ca2+-montmorillonite significantly induces the adoption of the extended conformation of TC. Chelation of TC with Ca2+ ions in the interlayer is also demonstrated. Therefore, Ca2+ ions in the interlayer behave as active sites for TC adsorption on montmorillonite, leading to the formation of montmorillonite-Ca 2+-TC complexes. The conformational changes that TC suffers upon adsorption may have important effects on the bioavailability and antimicrobial activity of the antibiotic.
Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue; 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
Fil: Savini, Monica Claudia. Universidad Nacional del Comahue; Argentina
Fil: Baschini, Miria Teresita. Universidad Nacional del Comahue; Argentina
Fil: Nicotra, Viviana Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina
Materia
TETRACYCLINE
MONTMORILLONITE
CIRCULAR DICHROISM
ADSORPTION
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:11336/101971
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/101971
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonitesParolo, Maria EugeniaAvena, Marcelo JavierSavini, Monica ClaudiaBaschini, Miria TeresitaNicotra, Viviana EstelaTETRACYCLINEMONTMORILLONITECIRCULAR DICHROISMADSORPTIONhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The interaction of tetracycline (TC) with a Na+-montmorillonite and a Ca2+-montmorillonite in aqueous media was investigated using a batch technique complemented with X-ray diffraction (XRD) and circular dichroism (CD). The adsorption of TC decreases by increasing the pH in both cases, although Ca2+-montmorillonite is a more effective adsorbent than Na+-montmorillonite in the pH range 6-8.5. In both cases, TC locates in the interlayer spacing, increasing the d 001 basal spacing from nearly 13.7 Å to nearly 22.0 Å. CD data of TC solutions indicates that increasing the pH induces structural changes from the twisted conformation to the extended conformation of the TC molecule. The presence of Ca2+ in the solution enhances this effect in the pH range 6-10.5. Adsorption on Na+-montmorillonite and Ca2+-montmorillonite significantly induces the adoption of the extended conformation of TC. Chelation of TC with Ca2+ ions in the interlayer is also demonstrated. Therefore, Ca2+ ions in the interlayer behave as active sites for TC adsorption on montmorillonite, leading to the formation of montmorillonite-Ca 2+-TC complexes. The conformational changes that TC suffers upon adsorption may have important effects on the bioavailability and antimicrobial activity of the antibiotic.Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue; 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; ArgentinaFil: Savini, Monica Claudia. Universidad Nacional del Comahue; ArgentinaFil: Baschini, Miria Teresita. Universidad Nacional del Comahue; ArgentinaFil: Nicotra, Viviana Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; ArgentinaElsevier Science2013-01info: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/11336/101971Parolo, Maria Eugenia; Avena, Marcelo Javier; Savini, Monica Claudia; Baschini, Miria Teresita; Nicotra, Viviana Estela; Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 417; 1-2013; 57-640927-7757CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.colsurfa.2012.10.060info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0927775712007479info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T10:46:38Zoai:ri.conicet.gov.ar:11336/101971instacron: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:34982025-11-05 10:46:38.89CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
title Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
spellingShingle Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
Parolo, Maria Eugenia
TETRACYCLINE
MONTMORILLONITE
CIRCULAR DICHROISM
ADSORPTION
title_short Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
title_full Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
title_fullStr Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
title_full_unstemmed Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
title_sort Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites
dc.creator.none.fl_str_mv Parolo, Maria Eugenia
Avena, Marcelo Javier
Savini, Monica Claudia
Baschini, Miria Teresita
Nicotra, Viviana Estela
author Parolo, Maria Eugenia
author_facet Parolo, Maria Eugenia
Avena, Marcelo Javier
Savini, Monica Claudia
Baschini, Miria Teresita
Nicotra, Viviana Estela
author_role author
author2 Avena, Marcelo Javier
Savini, Monica Claudia
Baschini, Miria Teresita
Nicotra, Viviana Estela
author2_role author
author
author
author
dc.subject.none.fl_str_mv TETRACYCLINE
MONTMORILLONITE
CIRCULAR DICHROISM
ADSORPTION
topic TETRACYCLINE
MONTMORILLONITE
CIRCULAR DICHROISM
ADSORPTION
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 interaction of tetracycline (TC) with a Na+-montmorillonite and a Ca2+-montmorillonite in aqueous media was investigated using a batch technique complemented with X-ray diffraction (XRD) and circular dichroism (CD). The adsorption of TC decreases by increasing the pH in both cases, although Ca2+-montmorillonite is a more effective adsorbent than Na+-montmorillonite in the pH range 6-8.5. In both cases, TC locates in the interlayer spacing, increasing the d 001 basal spacing from nearly 13.7 Å to nearly 22.0 Å. CD data of TC solutions indicates that increasing the pH induces structural changes from the twisted conformation to the extended conformation of the TC molecule. The presence of Ca2+ in the solution enhances this effect in the pH range 6-10.5. Adsorption on Na+-montmorillonite and Ca2+-montmorillonite significantly induces the adoption of the extended conformation of TC. Chelation of TC with Ca2+ ions in the interlayer is also demonstrated. Therefore, Ca2+ ions in the interlayer behave as active sites for TC adsorption on montmorillonite, leading to the formation of montmorillonite-Ca 2+-TC complexes. The conformational changes that TC suffers upon adsorption may have important effects on the bioavailability and antimicrobial activity of the antibiotic.
Fil: Parolo, Maria Eugenia. Universidad Nacional del Comahue; 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
Fil: Savini, Monica Claudia. Universidad Nacional del Comahue; Argentina
Fil: Baschini, Miria Teresita. Universidad Nacional del Comahue; Argentina
Fil: Nicotra, Viviana Estela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto Multidisciplinario de Biología Vegetal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto Multidisciplinario de Biología Vegetal; Argentina
description The interaction of tetracycline (TC) with a Na+-montmorillonite and a Ca2+-montmorillonite in aqueous media was investigated using a batch technique complemented with X-ray diffraction (XRD) and circular dichroism (CD). The adsorption of TC decreases by increasing the pH in both cases, although Ca2+-montmorillonite is a more effective adsorbent than Na+-montmorillonite in the pH range 6-8.5. In both cases, TC locates in the interlayer spacing, increasing the d 001 basal spacing from nearly 13.7 Å to nearly 22.0 Å. CD data of TC solutions indicates that increasing the pH induces structural changes from the twisted conformation to the extended conformation of the TC molecule. The presence of Ca2+ in the solution enhances this effect in the pH range 6-10.5. Adsorption on Na+-montmorillonite and Ca2+-montmorillonite significantly induces the adoption of the extended conformation of TC. Chelation of TC with Ca2+ ions in the interlayer is also demonstrated. Therefore, Ca2+ ions in the interlayer behave as active sites for TC adsorption on montmorillonite, leading to the formation of montmorillonite-Ca 2+-TC complexes. The conformational changes that TC suffers upon adsorption may have important effects on the bioavailability and antimicrobial activity of the antibiotic.
publishDate 2013
dc.date.none.fl_str_mv 2013-01
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/11336/101971
Parolo, Maria Eugenia; Avena, Marcelo Javier; Savini, Monica Claudia; Baschini, Miria Teresita; Nicotra, Viviana Estela; Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 417; 1-2013; 57-64
0927-7757
CONICET Digital
CONICET
url http://hdl.handle.net/11336/101971
identifier_str_mv Parolo, Maria Eugenia; Avena, Marcelo Javier; Savini, Monica Claudia; Baschini, Miria Teresita; Nicotra, Viviana Estela; Adsorption and circular dichroism of tetracycline on sodium and calcium-montmorillonites; Elsevier Science; Colloids and Surfaces A: Physicochemical and Engineering Aspects; 417; 1-2013; 57-64
0927-7757
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.colsurfa.2012.10.060
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0927775712007479
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 13.084122

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