Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s13762-020-03012-4 http://hdl.handle.net/11449/205487 |
Resumo: | A comparison of the catalytic activity of the copper-modified magnetite was carried out under different conditions (dark and irradiated) and irradiation systems (460 nm Vis-LED, 370 nm UV-LED and Solar) in the degradation of the antibiotic sulfathiazole (STZ). The catalyst copper-modified magnetite presented a mesoporous structure, with a high absorption range (200–800 nm), band gap of 1.80 eV characteristic of iron and copper oxides, negative surface charge (− 24.6 mV) at neutral pH and high stability in solution (absence of iron and copper leaching). The results showed that the degradation kinetics of STZ increased in the following order in relation to irradiation: dark < Vis-LED < UV-LED < Solar), promoting complete degradation after 15 min, indicating that under solar and UV irradiation the catalytic activity is improved, due to an increase in the speed of the Fe–Cu redox reactions from a quick transfer of electrons that occur on the surface of the catalyst, further facilitating the formation of HO· radicals. The results have further demonstrated that the copper-modified magnetite can promote heterogeneous Fenton processes under LED or solar irradiation and be applied to effective degradation of micropollutants in wastewaters and have proven the versatility and high catalytic activity. |
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Repositório Institucional da UNESP |
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spelling |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazoleAntibioticsFenton-likeIron and copper oxidesSolar irradiationUV–Vis LEDA comparison of the catalytic activity of the copper-modified magnetite was carried out under different conditions (dark and irradiated) and irradiation systems (460 nm Vis-LED, 370 nm UV-LED and Solar) in the degradation of the antibiotic sulfathiazole (STZ). The catalyst copper-modified magnetite presented a mesoporous structure, with a high absorption range (200–800 nm), band gap of 1.80 eV characteristic of iron and copper oxides, negative surface charge (− 24.6 mV) at neutral pH and high stability in solution (absence of iron and copper leaching). The results showed that the degradation kinetics of STZ increased in the following order in relation to irradiation: dark < Vis-LED < UV-LED < Solar), promoting complete degradation after 15 min, indicating that under solar and UV irradiation the catalytic activity is improved, due to an increase in the speed of the Fe–Cu redox reactions from a quick transfer of electrons that occur on the surface of the catalyst, further facilitating the formation of HO· radicals. The results have further demonstrated that the copper-modified magnetite can promote heterogeneous Fenton processes under LED or solar irradiation and be applied to effective degradation of micropollutants in wastewaters and have proven the versatility and high catalytic activity.Institute of Chemistry São Paulo State University (UNESP)Institute of Chemistry São Paulo State University (UNESP)Universidade Estadual Paulista (Unesp)Rojas-Mantilla, H. D. [UNESP]Lazarević, A. [UNESP]Emídio, E. S. [UNESP]Pupo Nogueira, R. F. [UNESP]2021-06-25T10:16:11Z2021-06-25T10:16:11Z2020-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s13762-020-03012-4International Journal of Environmental Science and Technology.1735-26301735-1472http://hdl.handle.net/11449/20548710.1007/s13762-020-03012-42-s2.0-85096337396Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengInternational Journal of Environmental Science and Technologyinfo:eu-repo/semantics/openAccess2021-10-23T14:40:27Zoai:repositorio.unesp.br:11449/205487Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:00:06.335820Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
title |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
spellingShingle |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole Rojas-Mantilla, H. D. [UNESP] Antibiotics Fenton-like Iron and copper oxides Solar irradiation UV–Vis LED |
title_short |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
title_full |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
title_fullStr |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
title_full_unstemmed |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
title_sort |
Influence of irradiation sources on the efficiency of copper-modified magnetite for photo-Fenton degradation of sulfathiazole |
author |
Rojas-Mantilla, H. D. [UNESP] |
author_facet |
Rojas-Mantilla, H. D. [UNESP] Lazarević, A. [UNESP] Emídio, E. S. [UNESP] Pupo Nogueira, R. F. [UNESP] |
author_role |
author |
author2 |
Lazarević, A. [UNESP] Emídio, E. S. [UNESP] Pupo Nogueira, R. F. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Rojas-Mantilla, H. D. [UNESP] Lazarević, A. [UNESP] Emídio, E. S. [UNESP] Pupo Nogueira, R. F. [UNESP] |
dc.subject.por.fl_str_mv |
Antibiotics Fenton-like Iron and copper oxides Solar irradiation UV–Vis LED |
topic |
Antibiotics Fenton-like Iron and copper oxides Solar irradiation UV–Vis LED |
description |
A comparison of the catalytic activity of the copper-modified magnetite was carried out under different conditions (dark and irradiated) and irradiation systems (460 nm Vis-LED, 370 nm UV-LED and Solar) in the degradation of the antibiotic sulfathiazole (STZ). The catalyst copper-modified magnetite presented a mesoporous structure, with a high absorption range (200–800 nm), band gap of 1.80 eV characteristic of iron and copper oxides, negative surface charge (− 24.6 mV) at neutral pH and high stability in solution (absence of iron and copper leaching). The results showed that the degradation kinetics of STZ increased in the following order in relation to irradiation: dark < Vis-LED < UV-LED < Solar), promoting complete degradation after 15 min, indicating that under solar and UV irradiation the catalytic activity is improved, due to an increase in the speed of the Fe–Cu redox reactions from a quick transfer of electrons that occur on the surface of the catalyst, further facilitating the formation of HO· radicals. The results have further demonstrated that the copper-modified magnetite can promote heterogeneous Fenton processes under LED or solar irradiation and be applied to effective degradation of micropollutants in wastewaters and have proven the versatility and high catalytic activity. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 2021-06-25T10:16:11Z 2021-06-25T10:16:11Z |
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/10.1007/s13762-020-03012-4 International Journal of Environmental Science and Technology. 1735-2630 1735-1472 http://hdl.handle.net/11449/205487 10.1007/s13762-020-03012-4 2-s2.0-85096337396 |
url |
http://dx.doi.org/10.1007/s13762-020-03012-4 http://hdl.handle.net/11449/205487 |
identifier_str_mv |
International Journal of Environmental Science and Technology. 1735-2630 1735-1472 10.1007/s13762-020-03012-4 2-s2.0-85096337396 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Environmental Science and Technology |
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_ |
1808129382538018816 |