Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine

Autores
Benzaquén, Tamara; Di Benedetto, Yanina Vanesa; Alfano, Orlando; Cuello, Natalia; Eimer, Griselda Alejandra
Año de publicación
2017
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Although wastewater treatment with conventional biological processes are often the most cost-effective alternative of all treatment options, different industrial wastewaters containing toxic or biorecalcitrant organic pollutants cannot be treated with these processes [1]. In recent years, to overcome this drawback, the applications of Advanced Oxidation Processes (AOP’s) have emerged as an important alternative for the efficient removal of organic pollutants [2]. In this work, MCM-41 materials have been synthesized and modified with different metal loadings of iron by the wet impregnation method. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and TEM and their behaviors as heterogeneous catalysts in the photo-Fenton reaction were studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine (ATZ) aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. Photo-Fenton tests were carried out in an isothermal, batch reactor (VR=85 cm3) made of borosilicate glass tube, with four tubular UV-Vis lamps (ACTINIC BL 20, Philips). The system included a sintered glass piece placed at the bottom through which an air flow was introduced to provide good mixing conditions. Also, the experimental setup had an all-glass heat exchanger connected to a thermostatic bath. As a result, it was shown that when the Fe content was 2.5 wt.% the pollutant degradation reached a maximum value. Then, in order to compare the effects of the most significant operating variables (initial catalyst concentrations (C0Fe/MCM-41(2.5)), H2O2 to ATZ initial molar ratios (R) and radiation levels (RAD)) on atrazine degradation, a study of the photonic efficiency is presented. The photonic efficiency of atrazine degradation was evaluated considering different experimental conditions employed two factorial designs (one for RAD=100% and the other for RAD=50%). Optimal values of R and C0Fe/MCM-41(2.5) were detected for the two radiation levels studied. Thus, it was demonstrated that the photonic efficiencies were negatively affected by an increase of initial H2O2 concentration above R=175 and of initial catalyst concentration above 1 g L-1. In addition, the efficiency of the system is not significantly improved by an increase of the levels of UV-radiation for R=350. Finally, the evolution in the iron speciation on solids for different metal loadings was also investigated. Several iron species were detected and, nature, dispersion and size of such species, was correlated with the different catalytic behaviors of the nanocomposites. It was found that iron oxide nanoparticles increased in amount and size when the Fe loading was increased (5, 10 and 15 wt.%) indicating a possible blocking of isolated Fe+3 species responsible for the activity of the solid (active sites). Consequently, the Fe/MCM-41(2.5) appears as a very promising catalyst for a heterogeneous photo-Fenton process of pre-treatment, capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the herbicide atrazine.
Fil: Benzaquén, Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Di Benedetto, Yanina Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Alfano, Orlando. Universidad Nacional del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina.
Fil: Fil. Cuello, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Materia
Heterogeneous photo-fenton penton
Degradation of atrazine.
Iron
MCM-41
Nivel de accesibilidad
acceso abierto
Condiciones de uso
2022-05-27T18:48:25Z
Repositorio
Repositorio Institucional Abierto (UTN)
Institución
Universidad Tecnológica Nacional
OAI Identificador
oai:ria.utn.edu.ar:20.500.12272/6488
Acceder
id RIAUTN_0da7cf1e9b46a513cfa303058360d931
oai_identifier_str oai:ria.utn.edu.ar:20.500.12272/6488
network_acronym_str RIAUTN
repository_id_str a
network_name_str Repositorio Institucional Abierto (UTN)
spelling Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazineBenzaquén, TamaraDi Benedetto, Yanina VanesaAlfano, OrlandoCuello, NataliaEimer, Griselda AlejandraHeterogeneous photo-fenton pentonDegradation of atrazine.IronMCM-41Although wastewater treatment with conventional biological processes are often the most cost-effective alternative of all treatment options, different industrial wastewaters containing toxic or biorecalcitrant organic pollutants cannot be treated with these processes [1]. In recent years, to overcome this drawback, the applications of Advanced Oxidation Processes (AOP’s) have emerged as an important alternative for the efficient removal of organic pollutants [2]. In this work, MCM-41 materials have been synthesized and modified with different metal loadings of iron by the wet impregnation method. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and TEM and their behaviors as heterogeneous catalysts in the photo-Fenton reaction were studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine (ATZ) aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. Photo-Fenton tests were carried out in an isothermal, batch reactor (VR=85 cm3) made of borosilicate glass tube, with four tubular UV-Vis lamps (ACTINIC BL 20, Philips). The system included a sintered glass piece placed at the bottom through which an air flow was introduced to provide good mixing conditions. Also, the experimental setup had an all-glass heat exchanger connected to a thermostatic bath. As a result, it was shown that when the Fe content was 2.5 wt.% the pollutant degradation reached a maximum value. Then, in order to compare the effects of the most significant operating variables (initial catalyst concentrations (C0Fe/MCM-41(2.5)), H2O2 to ATZ initial molar ratios (R) and radiation levels (RAD)) on atrazine degradation, a study of the photonic efficiency is presented. The photonic efficiency of atrazine degradation was evaluated considering different experimental conditions employed two factorial designs (one for RAD=100% and the other for RAD=50%). Optimal values of R and C0Fe/MCM-41(2.5) were detected for the two radiation levels studied. Thus, it was demonstrated that the photonic efficiencies were negatively affected by an increase of initial H2O2 concentration above R=175 and of initial catalyst concentration above 1 g L-1. In addition, the efficiency of the system is not significantly improved by an increase of the levels of UV-radiation for R=350. Finally, the evolution in the iron speciation on solids for different metal loadings was also investigated. Several iron species were detected and, nature, dispersion and size of such species, was correlated with the different catalytic behaviors of the nanocomposites. It was found that iron oxide nanoparticles increased in amount and size when the Fe loading was increased (5, 10 and 15 wt.%) indicating a possible blocking of isolated Fe+3 species responsible for the activity of the solid (active sites). Consequently, the Fe/MCM-41(2.5) appears as a very promising catalyst for a heterogeneous photo-Fenton process of pre-treatment, capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the herbicide atrazine.Fil: Benzaquén, Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.Fil: Di Benedetto, Yanina Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.Fil: Alfano, Orlando. Universidad Nacional del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina.Fil: Fil. Cuello, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.2022-05-27T18:48:25Z2022-05-27T18:48:25Z2017info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciapdfapplication/pdf5th European Conference Environmental Applications of Advanced Oxidation Processes (2017).http://hdl.handle.net/20.500.12272/6488enginfo:eu-repo/semantics/openAccess2022-05-27T18:48:25Zhttp://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives 4.0 InternacionalEimer, Griselda AlejandraNo comercial. Sólo de uso académico.reponame:Repositorio Institucional Abierto (UTN)instname:Universidad Tecnológica Nacional2026-09-24T12:44:41Zoai:ria.utn.edu.ar:20.500.12272/6488instacron:UTNInstitucionalhttp://ria.utn.edu.ar/Universidad públicaNo correspondehttp://ria.utn.edu.ar/oaigestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:a2026-09-24 12:44:41.981Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacionalfalse
dc.title.none.fl_str_mv Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
title Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
spellingShingle Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
Benzaquén, Tamara
Heterogeneous photo-fenton penton
Degradation of atrazine.
Iron
MCM-41
title_short Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
title_full Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
title_fullStr Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
title_full_unstemmed Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
title_sort Heterogeneous photo-fenton process with iron modified MCM-41 materials for the degradation of atrazine
dc.creator.none.fl_str_mv Benzaquén, Tamara
Di Benedetto, Yanina Vanesa
Alfano, Orlando
Cuello, Natalia
Eimer, Griselda Alejandra
author Benzaquén, Tamara
author_facet Benzaquén, Tamara
Di Benedetto, Yanina Vanesa
Alfano, Orlando
Cuello, Natalia
Eimer, Griselda Alejandra
author_role author
author2 Di Benedetto, Yanina Vanesa
Alfano, Orlando
Cuello, Natalia
Eimer, Griselda Alejandra
author2_role author
author
author
author
dc.subject.none.fl_str_mv Heterogeneous photo-fenton penton
Degradation of atrazine.
Iron
MCM-41
topic Heterogeneous photo-fenton penton
Degradation of atrazine.
Iron
MCM-41
dc.description.none.fl_txt_mv Although wastewater treatment with conventional biological processes are often the most cost-effective alternative of all treatment options, different industrial wastewaters containing toxic or biorecalcitrant organic pollutants cannot be treated with these processes [1]. In recent years, to overcome this drawback, the applications of Advanced Oxidation Processes (AOP’s) have emerged as an important alternative for the efficient removal of organic pollutants [2]. In this work, MCM-41 materials have been synthesized and modified with different metal loadings of iron by the wet impregnation method. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and TEM and their behaviors as heterogeneous catalysts in the photo-Fenton reaction were studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine (ATZ) aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. Photo-Fenton tests were carried out in an isothermal, batch reactor (VR=85 cm3) made of borosilicate glass tube, with four tubular UV-Vis lamps (ACTINIC BL 20, Philips). The system included a sintered glass piece placed at the bottom through which an air flow was introduced to provide good mixing conditions. Also, the experimental setup had an all-glass heat exchanger connected to a thermostatic bath. As a result, it was shown that when the Fe content was 2.5 wt.% the pollutant degradation reached a maximum value. Then, in order to compare the effects of the most significant operating variables (initial catalyst concentrations (C0Fe/MCM-41(2.5)), H2O2 to ATZ initial molar ratios (R) and radiation levels (RAD)) on atrazine degradation, a study of the photonic efficiency is presented. The photonic efficiency of atrazine degradation was evaluated considering different experimental conditions employed two factorial designs (one for RAD=100% and the other for RAD=50%). Optimal values of R and C0Fe/MCM-41(2.5) were detected for the two radiation levels studied. Thus, it was demonstrated that the photonic efficiencies were negatively affected by an increase of initial H2O2 concentration above R=175 and of initial catalyst concentration above 1 g L-1. In addition, the efficiency of the system is not significantly improved by an increase of the levels of UV-radiation for R=350. Finally, the evolution in the iron speciation on solids for different metal loadings was also investigated. Several iron species were detected and, nature, dispersion and size of such species, was correlated with the different catalytic behaviors of the nanocomposites. It was found that iron oxide nanoparticles increased in amount and size when the Fe loading was increased (5, 10 and 15 wt.%) indicating a possible blocking of isolated Fe+3 species responsible for the activity of the solid (active sites). Consequently, the Fe/MCM-41(2.5) appears as a very promising catalyst for a heterogeneous photo-Fenton process of pre-treatment, capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the herbicide atrazine.
Fil: Benzaquén, Tamara. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Di Benedetto, Yanina Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Alfano, Orlando. Universidad Nacional del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina.
Fil: Fil. Cuello, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina.
description Although wastewater treatment with conventional biological processes are often the most cost-effective alternative of all treatment options, different industrial wastewaters containing toxic or biorecalcitrant organic pollutants cannot be treated with these processes [1]. In recent years, to overcome this drawback, the applications of Advanced Oxidation Processes (AOP’s) have emerged as an important alternative for the efficient removal of organic pollutants [2]. In this work, MCM-41 materials have been synthesized and modified with different metal loadings of iron by the wet impregnation method. The different meso-structures obtained were characterized by XDR, UVVIS-RD, ICP and TEM and their behaviors as heterogeneous catalysts in the photo-Fenton reaction were studied. Thus, iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of atrazine (ATZ) aqueous solutions using UV-visible irradiation at room temperature and close to neutral pH. Photo-Fenton tests were carried out in an isothermal, batch reactor (VR=85 cm3) made of borosilicate glass tube, with four tubular UV-Vis lamps (ACTINIC BL 20, Philips). The system included a sintered glass piece placed at the bottom through which an air flow was introduced to provide good mixing conditions. Also, the experimental setup had an all-glass heat exchanger connected to a thermostatic bath. As a result, it was shown that when the Fe content was 2.5 wt.% the pollutant degradation reached a maximum value. Then, in order to compare the effects of the most significant operating variables (initial catalyst concentrations (C0Fe/MCM-41(2.5)), H2O2 to ATZ initial molar ratios (R) and radiation levels (RAD)) on atrazine degradation, a study of the photonic efficiency is presented. The photonic efficiency of atrazine degradation was evaluated considering different experimental conditions employed two factorial designs (one for RAD=100% and the other for RAD=50%). Optimal values of R and C0Fe/MCM-41(2.5) were detected for the two radiation levels studied. Thus, it was demonstrated that the photonic efficiencies were negatively affected by an increase of initial H2O2 concentration above R=175 and of initial catalyst concentration above 1 g L-1. In addition, the efficiency of the system is not significantly improved by an increase of the levels of UV-radiation for R=350. Finally, the evolution in the iron speciation on solids for different metal loadings was also investigated. Several iron species were detected and, nature, dispersion and size of such species, was correlated with the different catalytic behaviors of the nanocomposites. It was found that iron oxide nanoparticles increased in amount and size when the Fe loading was increased (5, 10 and 15 wt.%) indicating a possible blocking of isolated Fe+3 species responsible for the activity of the solid (active sites). Consequently, the Fe/MCM-41(2.5) appears as a very promising catalyst for a heterogeneous photo-Fenton process of pre-treatment, capable of enhancing the biodegradability of water contaminated with biorecalcitrant chemicals, as the herbicide atrazine.
publishDate 2017
dc.date.none.fl_str_mv 2017
2022-05-27T18:48:25Z
2022-05-27T18:48:25Z
dc.type.none.fl_str_mv info:eu-repo/semantics/conferenceObject
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
format conferenceObject
status_str publishedVersion
dc.identifier.none.fl_str_mv 5th European Conference Environmental Applications of Advanced Oxidation Processes (2017).
http://hdl.handle.net/20.500.12272/6488
identifier_str_mv 5th European Conference Environmental Applications of Advanced Oxidation Processes (2017).
url http://hdl.handle.net/20.500.12272/6488
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
2022-05-27T18:48:25Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Eimer, Griselda Alejandra
No comercial. Sólo de uso académico.
eu_rights_str_mv openAccess
rights_invalid_str_mv 2022-05-27T18:48:25Z
http://creativecommons.org/licenses/by-nc-nd/4.0/
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Eimer, Griselda Alejandra
No comercial. Sólo de uso académico.
dc.format.none.fl_str_mv pdf
application/pdf
dc.source.none.fl_str_mv reponame:Repositorio Institucional Abierto (UTN)
instname:Universidad Tecnológica Nacional
reponame_str Repositorio Institucional Abierto (UTN)
collection Repositorio Institucional Abierto (UTN)
instname_str Universidad Tecnológica Nacional
repository.name.fl_str_mv Repositorio Institucional Abierto (UTN) - Universidad Tecnológica Nacional
repository.mail.fl_str_mv gestionria@rec.utn.edu.ar; fsuarez@rec.utn.edu.ar
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