Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/24727 |
Resumo: | Sulfamethoxazole (SMX) is the most representative antibiotic of the sulfonamides group used in both human and veterinary medicine, and thus frequently detected in water resources. This has caused special concern due to the pronounced toxicity and potential to foster bacterial resistance of this drug. Therefore, and to further understand the fate of SMX in the aquatic environment, its photodegradation under simulated solar radiation was here studied in ultrapure water and in different environmental samples, namely estuarine water, freshwater and wastewater. SMX underwent very fast photodegradation in ultrapure water, presenting a half-life time (t1/2) of 0.86 h. However, in environmental samples, the SMX photodegradation rate was much slower, with 5.4 h < t1/2 < 7.8 h. The main novelty of this work was to prove that pH, salinity and dissolved organic matter are determinant factors in the decrease of the SMX photodegradation rate observed in environmental samples and, thus, they will influence the SMX fate and persistence, potentially increasing the risks associated to the presence of this pollutant in the environment. |
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Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinityHumic SubstancesPhotolysisSulfonamide antibioticsApparent direct quantum yieldEmerging contaminantsSulfamethoxazole (SMX) is the most representative antibiotic of the sulfonamides group used in both human and veterinary medicine, and thus frequently detected in water resources. This has caused special concern due to the pronounced toxicity and potential to foster bacterial resistance of this drug. Therefore, and to further understand the fate of SMX in the aquatic environment, its photodegradation under simulated solar radiation was here studied in ultrapure water and in different environmental samples, namely estuarine water, freshwater and wastewater. SMX underwent very fast photodegradation in ultrapure water, presenting a half-life time (t1/2) of 0.86 h. However, in environmental samples, the SMX photodegradation rate was much slower, with 5.4 h < t1/2 < 7.8 h. The main novelty of this work was to prove that pH, salinity and dissolved organic matter are determinant factors in the decrease of the SMX photodegradation rate observed in environmental samples and, thus, they will influence the SMX fate and persistence, potentially increasing the risks associated to the presence of this pollutant in the environment.Elsevier2020-01-15T00:00:00Z2019-01-15T00:00:00Z2019-01-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/24727eng0048-969710.1016/j.scitotenv.2018.08.235Oliveira, CindyLima, Diana L DSilva, Carla PatríciaCalisto, VâniaOtero, MartaEsteves, Valdemar Iinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:48:10Zoai:ria.ua.pt:10773/24727Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:13.189582Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
title |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
spellingShingle |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity Oliveira, Cindy Humic Substances Photolysis Sulfonamide antibiotics Apparent direct quantum yield Emerging contaminants |
title_short |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
title_full |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
title_fullStr |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
title_full_unstemmed |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
title_sort |
Photodegradation of sulfamethoxazole in environmental samples: the role of pH, organic matter and salinity |
author |
Oliveira, Cindy |
author_facet |
Oliveira, Cindy Lima, Diana L D Silva, Carla Patrícia Calisto, Vânia Otero, Marta Esteves, Valdemar I |
author_role |
author |
author2 |
Lima, Diana L D Silva, Carla Patrícia Calisto, Vânia Otero, Marta Esteves, Valdemar I |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Oliveira, Cindy Lima, Diana L D Silva, Carla Patrícia Calisto, Vânia Otero, Marta Esteves, Valdemar I |
dc.subject.por.fl_str_mv |
Humic Substances Photolysis Sulfonamide antibiotics Apparent direct quantum yield Emerging contaminants |
topic |
Humic Substances Photolysis Sulfonamide antibiotics Apparent direct quantum yield Emerging contaminants |
description |
Sulfamethoxazole (SMX) is the most representative antibiotic of the sulfonamides group used in both human and veterinary medicine, and thus frequently detected in water resources. This has caused special concern due to the pronounced toxicity and potential to foster bacterial resistance of this drug. Therefore, and to further understand the fate of SMX in the aquatic environment, its photodegradation under simulated solar radiation was here studied in ultrapure water and in different environmental samples, namely estuarine water, freshwater and wastewater. SMX underwent very fast photodegradation in ultrapure water, presenting a half-life time (t1/2) of 0.86 h. However, in environmental samples, the SMX photodegradation rate was much slower, with 5.4 h < t1/2 < 7.8 h. The main novelty of this work was to prove that pH, salinity and dissolved organic matter are determinant factors in the decrease of the SMX photodegradation rate observed in environmental samples and, thus, they will influence the SMX fate and persistence, potentially increasing the risks associated to the presence of this pollutant in the environment. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-15T00:00:00Z 2019-01-15 2020-01-15T00:00:00Z |
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://hdl.handle.net/10773/24727 |
url |
http://hdl.handle.net/10773/24727 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0048-9697 10.1016/j.scitotenv.2018.08.235 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137636439293952 |