Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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.2021.130258 http://hdl.handle.net/11449/208522 |
Resumo: | This study describes the characterization of Nontronite, a clay mineral with high content of structural iron, before and after iron incorporation and 600 °C heat treatment. The Nontronite was classified as a mesoporous material, with high absorption in the UV–Vis range and band gap energy of 1.9 eV, indicative of the presence of superficial hematite, also verified in XRD analysis. The heat treatment promoted a structure rearrangement and the conversion of other iron phases to hematite, allowing the formation of surface irregular sites on Nontronite and facilitating the access for the decomposition of H2O2 into HO[rad]. Its catalytic activity in heterogeneous photo-Fenton process was evaluated during the degradation of the antibiotic sulfathiazole (STZ) and showed high activity achieving undetectable levels of STZ after 20 min under UV-LED irradiation and solar irradiation, and showing no iron leaching under controlled pH = 3. The degradation intermediates identified indicated hydroxylation as the main degradation route. |
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Repositório Institucional da UNESP |
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2946 |
spelling |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processesCatalyst supportHematiteHydroxyl radicalSimultaneous degradationSmectiteThis study describes the characterization of Nontronite, a clay mineral with high content of structural iron, before and after iron incorporation and 600 °C heat treatment. The Nontronite was classified as a mesoporous material, with high absorption in the UV–Vis range and band gap energy of 1.9 eV, indicative of the presence of superficial hematite, also verified in XRD analysis. The heat treatment promoted a structure rearrangement and the conversion of other iron phases to hematite, allowing the formation of surface irregular sites on Nontronite and facilitating the access for the decomposition of H2O2 into HO[rad]. Its catalytic activity in heterogeneous photo-Fenton process was evaluated during the degradation of the antibiotic sulfathiazole (STZ) and showed high activity achieving undetectable levels of STZ after 20 min under UV-LED irradiation and solar irradiation, and showing no iron leaching under controlled pH = 3. The degradation intermediates identified indicated hydroxylation as the main degradation route.São Paulo State University (UNESP) Institute of Chemistry, Av. Prof. Francisco Degni 55São Paulo State University (UNESP) Institute of Chemistry, Av. Prof. Francisco Degni 55Universidade Estadual Paulista (Unesp)Rojas-Mantilla, Hernán D. [UNESP]Ayala-Duran, Saidy C. [UNESP]Pupo Nogueira, Raquel F. [UNESP]2021-06-25T11:13:28Z2021-06-25T11:13:28Z2021-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.chemosphere.2021.130258Chemosphere, v. 277.1879-12980045-6535http://hdl.handle.net/11449/20852210.1016/j.chemosphere.2021.1302582-s2.0-85103086137Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengChemosphereinfo:eu-repo/semantics/openAccess2021-10-23T19:02:14Zoai:repositorio.unesp.br:11449/208522Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:48:07.764645Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
title |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
spellingShingle |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes Rojas-Mantilla, Hernán D. [UNESP] Catalyst support Hematite Hydroxyl radical Simultaneous degradation Smectite |
title_short |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
title_full |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
title_fullStr |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
title_full_unstemmed |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
title_sort |
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes |
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 |
Catalyst support Hematite Hydroxyl radical Simultaneous degradation Smectite |
topic |
Catalyst support Hematite Hydroxyl radical Simultaneous degradation Smectite |
description |
This study describes the characterization of Nontronite, a clay mineral with high content of structural iron, before and after iron incorporation and 600 °C heat treatment. The Nontronite was classified as a mesoporous material, with high absorption in the UV–Vis range and band gap energy of 1.9 eV, indicative of the presence of superficial hematite, also verified in XRD analysis. The heat treatment promoted a structure rearrangement and the conversion of other iron phases to hematite, allowing the formation of surface irregular sites on Nontronite and facilitating the access for the decomposition of H2O2 into HO[rad]. Its catalytic activity in heterogeneous photo-Fenton process was evaluated during the degradation of the antibiotic sulfathiazole (STZ) and showed high activity achieving undetectable levels of STZ after 20 min under UV-LED irradiation and solar irradiation, and showing no iron leaching under controlled pH = 3. The degradation intermediates identified indicated hydroxylation as the main degradation route. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T11:13:28Z 2021-06-25T11:13:28Z 2021-08-01 |
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.2021.130258 Chemosphere, v. 277. 1879-1298 0045-6535 http://hdl.handle.net/11449/208522 10.1016/j.chemosphere.2021.130258 2-s2.0-85103086137 |
url |
http://dx.doi.org/10.1016/j.chemosphere.2021.130258 http://hdl.handle.net/11449/208522 |
identifier_str_mv |
Chemosphere, v. 277. 1879-1298 0045-6535 10.1016/j.chemosphere.2021.130258 2-s2.0-85103086137 |
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_ |
1808128860384919552 |