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(1g)-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(1g)-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(1g) 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(1g) 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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/7514
Ver los metadatos del registro completo
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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(1g)-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(1g)-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(1g) 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(1g) 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 Técnicas2025-09-03T10:01:55Zoai: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:34982025-09-03 10:01:55.955CONICET 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(1g)-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(1g)-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(1g) 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(1g) 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(1g)-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(1g)-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(1g) 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(1g) 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/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf application/pdf application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf application/pdf application/pdf |
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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13.13397 |