The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants

Autores
Ferrari, Gabriela Verónica; Andrada, María Elisa; Natera, Jose Eduardo; Muñoz, Vanesa Alejandra; Montaña, Maria Paulina; Gambetta, Carolina; Boiero, María Laura; Montenegro, Mariana Angélica; Massad, Walter Alfredo; Garcia, Norman Andino
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The known O2(1g)-sensitizer system Chitosan bounded Rose Bengal (CH-RB), with Rose Bengal (RB) immobilized by irreversible covalent bonding to the polymer Chitosan (CH), soluble in aquous acidic medium, was employed in the photodegradation of three tri-hydroxy benzene water-contaminants (THBs). The system sensitizes the O2(1g)-mediated photodegradation of THBs by a process kinetically favored, as compared to that employing free RB dissolved in the same solvent. Additionally the free xanthene dye, degradable by O2(1g) through self-sensitization upon prolonged light-exposure, is considerably protected when bonded to CH-polymer. The polymeric sensitizer, totally insoluble in neutral medium, can be removed from the solution after the photodegradative cycle by precipitation through a simple pH change. This fact constitutes an interesting aspect in the context of photoremediation of confined polluted waters. In other words, the sensitizing system could be useful for avoiding to dissolve dyestuffs in the polluted waters, in order to act as conventional sunlight-absorbing dye-sensitizers. In parallel the interaction CH - O2(1g) in acidic solution was evaluated. The polymer quenches the oxidative species with a rate constant 2.4x108 M-1s-1 being the process mostly attributable to a physical interaction. This fact promotes the photoprotection of the bonded dye in the CH-RB polymer.
Fil: Ferrari, Gabriela Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Andrada, María Elisa. Universidad Nacional de Rio Cuarto; Argentina
Fil: Natera, Jose Eduardo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Muñoz, Vanesa Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Montaña, Maria Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Gambetta, Carolina. Universidad Nacional de Rio Cuarto; Argentina
Fil: Boiero, María Laura. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina
Fil: Montenegro, Mariana Angélica. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina. Universidad Nacional de Villa Maria; Argentina
Fil: Massad, Walter Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Garcia, Norman Andino. Universidad Nacional de Rio Cuarto; Argentina
Materia
Chitosan
Photodegradation
Polymeric Sensitizer
Rose Bengal
Trihydroxybenzenes
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:11336/7514
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/7514
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutantsFerrari, Gabriela VerónicaAndrada, María ElisaNatera, Jose EduardoMuñoz, Vanesa AlejandraMontaña, Maria PaulinaGambetta, CarolinaBoiero, María LauraMontenegro, Mariana AngélicaMassad, Walter AlfredoGarcia, Norman AndinoChitosanPhotodegradationPolymeric SensitizerRose BengalTrihydroxybenzeneshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The known O2(1g)-sensitizer system Chitosan bounded Rose Bengal (CH-RB), with Rose Bengal (RB) immobilized by irreversible covalent bonding to the polymer Chitosan (CH), soluble in aquous acidic medium, was employed in the photodegradation of three tri-hydroxy benzene water-contaminants (THBs). The system sensitizes the O2(1g)-mediated photodegradation of THBs by a process kinetically favored, as compared to that employing free RB dissolved in the same solvent. Additionally the free xanthene dye, degradable by O2(1g) through self-sensitization upon prolonged light-exposure, is considerably protected when bonded to CH-polymer. The polymeric sensitizer, totally insoluble in neutral medium, can be removed from the solution after the photodegradative cycle by precipitation through a simple pH change. This fact constitutes an interesting aspect in the context of photoremediation of confined polluted waters. In other words, the sensitizing system could be useful for avoiding to dissolve dyestuffs in the polluted waters, in order to act as conventional sunlight-absorbing dye-sensitizers. In parallel the interaction CH - O2(1g) in acidic solution was evaluated. The polymer quenches the oxidative species with a rate constant 2.4x108 M-1s-1 being the process mostly attributable to a physical interaction. This fact promotes the photoprotection of the bonded dye in the CH-RB polymer.Fil: Ferrari, Gabriela Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; ArgentinaFil: Andrada, María Elisa. Universidad Nacional de Rio Cuarto; ArgentinaFil: Natera, Jose Eduardo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaFil: Muñoz, Vanesa Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; ArgentinaFil: Montaña, Maria Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; ArgentinaFil: Gambetta, Carolina. Universidad Nacional de Rio Cuarto; ArgentinaFil: Boiero, María Laura. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; ArgentinaFil: Montenegro, Mariana Angélica. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina. Universidad Nacional de Villa Maria; ArgentinaFil: Massad, Walter Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaFil: Garcia, Norman Andino. Universidad Nacional de Rio Cuarto; ArgentinaWiley2014-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7514Ferrari, Gabriela Verónica; Andrada, María Elisa; Natera, Jose Eduardo; Muñoz, Vanesa Alejandra; Montaña, Maria Paulina; et al.; The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants; Wiley; Photochemistry and Photobiology; 90; 6; 10-2014; 1251-12560031-8655enginfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/php.12350/abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1111/php.12350info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:16:38Zoai:ri.conicet.gov.ar:11336/7514instacron: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 10:16:39.266CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
title The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
spellingShingle The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
Ferrari, Gabriela Verónica
Chitosan
Photodegradation
Polymeric Sensitizer
Rose Bengal
Trihydroxybenzenes
title_short The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
title_full The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
title_fullStr The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
title_full_unstemmed The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
title_sort The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants
dc.creator.none.fl_str_mv Ferrari, Gabriela Verónica
Andrada, María Elisa
Natera, Jose Eduardo
Muñoz, Vanesa Alejandra
Montaña, Maria Paulina
Gambetta, Carolina
Boiero, María Laura
Montenegro, Mariana Angélica
Massad, Walter Alfredo
Garcia, Norman Andino
author Ferrari, Gabriela Verónica
author_facet Ferrari, Gabriela Verónica
Andrada, María Elisa
Natera, Jose Eduardo
Muñoz, Vanesa Alejandra
Montaña, Maria Paulina
Gambetta, Carolina
Boiero, María Laura
Montenegro, Mariana Angélica
Massad, Walter Alfredo
Garcia, Norman Andino
author_role author
author2 Andrada, María Elisa
Natera, Jose Eduardo
Muñoz, Vanesa Alejandra
Montaña, Maria Paulina
Gambetta, Carolina
Boiero, María Laura
Montenegro, Mariana Angélica
Massad, Walter Alfredo
Garcia, Norman Andino
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Chitosan
Photodegradation
Polymeric Sensitizer
Rose Bengal
Trihydroxybenzenes
topic Chitosan
Photodegradation
Polymeric Sensitizer
Rose Bengal
Trihydroxybenzenes
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 known O2(1g)-sensitizer system Chitosan bounded Rose Bengal (CH-RB), with Rose Bengal (RB) immobilized by irreversible covalent bonding to the polymer Chitosan (CH), soluble in aquous acidic medium, was employed in the photodegradation of three tri-hydroxy benzene water-contaminants (THBs). The system sensitizes the O2(1g)-mediated photodegradation of THBs by a process kinetically favored, as compared to that employing free RB dissolved in the same solvent. Additionally the free xanthene dye, degradable by O2(1g) through self-sensitization upon prolonged light-exposure, is considerably protected when bonded to CH-polymer. The polymeric sensitizer, totally insoluble in neutral medium, can be removed from the solution after the photodegradative cycle by precipitation through a simple pH change. This fact constitutes an interesting aspect in the context of photoremediation of confined polluted waters. In other words, the sensitizing system could be useful for avoiding to dissolve dyestuffs in the polluted waters, in order to act as conventional sunlight-absorbing dye-sensitizers. In parallel the interaction CH - O2(1g) in acidic solution was evaluated. The polymer quenches the oxidative species with a rate constant 2.4x108 M-1s-1 being the process mostly attributable to a physical interaction. This fact promotes the photoprotection of the bonded dye in the CH-RB polymer.
Fil: Ferrari, Gabriela Verónica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Andrada, María Elisa. Universidad Nacional de Rio Cuarto; Argentina
Fil: Natera, Jose Eduardo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Muñoz, Vanesa Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Montaña, Maria Paulina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Química de San Luis; Argentina
Fil: Gambetta, Carolina. Universidad Nacional de Rio Cuarto; Argentina
Fil: Boiero, María Laura. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina
Fil: Montenegro, Mariana Angélica. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina. Universidad Nacional de Villa Maria; Argentina
Fil: Massad, Walter Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
Fil: Garcia, Norman Andino. Universidad Nacional de Rio Cuarto; Argentina
description The known O2(1g)-sensitizer system Chitosan bounded Rose Bengal (CH-RB), with Rose Bengal (RB) immobilized by irreversible covalent bonding to the polymer Chitosan (CH), soluble in aquous acidic medium, was employed in the photodegradation of three tri-hydroxy benzene water-contaminants (THBs). The system sensitizes the O2(1g)-mediated photodegradation of THBs by a process kinetically favored, as compared to that employing free RB dissolved in the same solvent. Additionally the free xanthene dye, degradable by O2(1g) through self-sensitization upon prolonged light-exposure, is considerably protected when bonded to CH-polymer. The polymeric sensitizer, totally insoluble in neutral medium, can be removed from the solution after the photodegradative cycle by precipitation through a simple pH change. This fact constitutes an interesting aspect in the context of photoremediation of confined polluted waters. In other words, the sensitizing system could be useful for avoiding to dissolve dyestuffs in the polluted waters, in order to act as conventional sunlight-absorbing dye-sensitizers. In parallel the interaction CH - O2(1g) in acidic solution was evaluated. The polymer quenches the oxidative species with a rate constant 2.4x108 M-1s-1 being the process mostly attributable to a physical interaction. This fact promotes the photoprotection of the bonded dye in the CH-RB polymer.
publishDate 2014
dc.date.none.fl_str_mv 2014-10
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/11336/7514
Ferrari, Gabriela Verónica; Andrada, María Elisa; Natera, Jose Eduardo; Muñoz, Vanesa Alejandra; Montaña, Maria Paulina; et al.; The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants; Wiley; Photochemistry and Photobiology; 90; 6; 10-2014; 1251-1256
0031-8655
url http://hdl.handle.net/11336/7514
identifier_str_mv Ferrari, Gabriela Verónica; Andrada, María Elisa; Natera, Jose Eduardo; Muñoz, Vanesa Alejandra; Montaña, Maria Paulina; et al.; The employment of a removable chitosan-derivatized polymeric sensitizer in the photooxidation of polyhydroxylated water-pollutants; Wiley; Photochemistry and Photobiology; 90; 6; 10-2014; 1251-1256
0031-8655
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/php.12350/abstract
info:eu-repo/semantics/altIdentifier/doi/10.1111/php.12350
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/
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application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
application/pdf
application/pdf
application/vnd.openxmlformats-officedocument.wordprocessingml.document
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dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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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