Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.chemosphere.2021.132966 http://hdl.handle.net/11449/233832 |
Resumo: | The catalytic activity of a Brazilian natural clay modified with the immobilization of iron oxide was applied in the heterogeneous Fenton process for the degradation of the antibiotic sulfathiazole (STZ). The clay without any treatment indicated a lamellar type material with mesoporous distribution that presents a heterogeneous mixture of phases (type 1:1 and 2:1 structures), with a predominance of quartz, montmorillonite, gibbsite and kaolinite, and with SiO2, Al2O3, Fe2O3, K2O, TiO2, MgO as major oxides. Its high absorption in the UV–Vis ranges with a bandgap energy of 1.9 eV was attributed to the presence of hematite. It was observed that the effects of the addition of starch before heat treatment, and impregnation with iron, modified the clay surface. F rom the X-ray photoelectron spectroscopy analysis it was concluded that a structural reorganization is related to the conversion of the various iron oxide phases into hematite, as well as promoting an increase in Fe2+/ Fe3+ redox reactions allowing rapid degradation of STZ. The catalyst impregnated with iron and treated at 600 °C showed to be an economical and versatile catalyst with high catalytic efficiency (>97% STZ degradation after 60 min), with small differences according to the type of LED device used. Furthermore, it presented high stability and reusability reaching 93% degradation of STZ after four cycles of reuse with low consumption of H2O2. |
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Repositório Institucional da UNESP |
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Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton processCatalytic supportHydroxyl radicalIron oxideKaoliniteMontmorilloniteThe catalytic activity of a Brazilian natural clay modified with the immobilization of iron oxide was applied in the heterogeneous Fenton process for the degradation of the antibiotic sulfathiazole (STZ). The clay without any treatment indicated a lamellar type material with mesoporous distribution that presents a heterogeneous mixture of phases (type 1:1 and 2:1 structures), with a predominance of quartz, montmorillonite, gibbsite and kaolinite, and with SiO2, Al2O3, Fe2O3, K2O, TiO2, MgO as major oxides. Its high absorption in the UV–Vis ranges with a bandgap energy of 1.9 eV was attributed to the presence of hematite. It was observed that the effects of the addition of starch before heat treatment, and impregnation with iron, modified the clay surface. F rom the X-ray photoelectron spectroscopy analysis it was concluded that a structural reorganization is related to the conversion of the various iron oxide phases into hematite, as well as promoting an increase in Fe2+/ Fe3+ redox reactions allowing rapid degradation of STZ. The catalyst impregnated with iron and treated at 600 °C showed to be an economical and versatile catalyst with high catalytic efficiency (>97% STZ degradation after 60 min), with small differences according to the type of LED device used. Furthermore, it presented high stability and reusability reaching 93% degradation of STZ after four cycles of reuse with low consumption of H2O2.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)São Paulo State University (UNESP) Institute of Chemistry, Av. Prof. Francisco Degni 55 SPSão Paulo State University (UNESP) Institute of Chemistry, Av. Prof. Francisco Degni 55 SPFAPESP: 2017/03148–0FAPESP: 2018/12780–4Universidade Estadual Paulista (UNESP)Rojas-Mantilla, Hernán D. [UNESP]Ayala-Duran, Saidy C. [UNESP]Pupo Nogueira, Raquel F. [UNESP]2022-05-01T10:51:12Z2022-05-01T10:51:12Z2022-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.chemosphere.2021.132966Chemosphere, v. 291.1879-12980045-6535http://hdl.handle.net/11449/23383210.1016/j.chemosphere.2021.1329662-s2.0-85119677093Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemosphereinfo:eu-repo/semantics/openAccess2022-05-01T10:51:12Zoai:repositorio.unesp.br:11449/233832Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:45:46.291280Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
title |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
spellingShingle |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process Rojas-Mantilla, Hernán D. [UNESP] Catalytic support Hydroxyl radical Iron oxide Kaolinite Montmorillonite |
title_short |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
title_full |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
title_fullStr |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
title_full_unstemmed |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
title_sort |
Modification of a Brazilian natural clay and catalytic activity in heterogeneous photo-Fenton process |
author |
Rojas-Mantilla, Hernán D. [UNESP] |
author_facet |
Rojas-Mantilla, Hernán D. [UNESP] Ayala-Duran, Saidy C. [UNESP] Pupo Nogueira, Raquel F. [UNESP] |
author_role |
author |
author2 |
Ayala-Duran, Saidy C. [UNESP] Pupo Nogueira, Raquel F. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Rojas-Mantilla, Hernán D. [UNESP] Ayala-Duran, Saidy C. [UNESP] Pupo Nogueira, Raquel F. [UNESP] |
dc.subject.por.fl_str_mv |
Catalytic support Hydroxyl radical Iron oxide Kaolinite Montmorillonite |
topic |
Catalytic support Hydroxyl radical Iron oxide Kaolinite Montmorillonite |
description |
The catalytic activity of a Brazilian natural clay modified with the immobilization of iron oxide was applied in the heterogeneous Fenton process for the degradation of the antibiotic sulfathiazole (STZ). The clay without any treatment indicated a lamellar type material with mesoporous distribution that presents a heterogeneous mixture of phases (type 1:1 and 2:1 structures), with a predominance of quartz, montmorillonite, gibbsite and kaolinite, and with SiO2, Al2O3, Fe2O3, K2O, TiO2, MgO as major oxides. Its high absorption in the UV–Vis ranges with a bandgap energy of 1.9 eV was attributed to the presence of hematite. It was observed that the effects of the addition of starch before heat treatment, and impregnation with iron, modified the clay surface. F rom the X-ray photoelectron spectroscopy analysis it was concluded that a structural reorganization is related to the conversion of the various iron oxide phases into hematite, as well as promoting an increase in Fe2+/ Fe3+ redox reactions allowing rapid degradation of STZ. The catalyst impregnated with iron and treated at 600 °C showed to be an economical and versatile catalyst with high catalytic efficiency (>97% STZ degradation after 60 min), with small differences according to the type of LED device used. Furthermore, it presented high stability and reusability reaching 93% degradation of STZ after four cycles of reuse with low consumption of H2O2. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-05-01T10:51:12Z 2022-05-01T10:51:12Z 2022-03-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.chemosphere.2021.132966 Chemosphere, v. 291. 1879-1298 0045-6535 http://hdl.handle.net/11449/233832 10.1016/j.chemosphere.2021.132966 2-s2.0-85119677093 |
url |
http://dx.doi.org/10.1016/j.chemosphere.2021.132966 http://hdl.handle.net/11449/233832 |
identifier_str_mv |
Chemosphere, v. 291. 1879-1298 0045-6535 10.1016/j.chemosphere.2021.132966 2-s2.0-85119677093 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Chemosphere |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129243469578240 |