Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter
Abstract Photolysis is an important attenuation pathway for the removal of wastewater effluent organic micropollutants from surface waters. In this work, direct and indirect processes leading to the degradation of the disinfectant, triclocarban were studied. Photo-irradiation experiments were conduc...
Published in: | Elementa: Science of the Anthropocene |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
BioOne
2015
|
Subjects: | |
Online Access: | https://doi.org/10.12952/journal.elementa.000050 https://doaj.org/article/542566ca0abd4587a2dd40203c58ec26 |
id |
ftdoajarticles:oai:doaj.org/article:542566ca0abd4587a2dd40203c58ec26 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:542566ca0abd4587a2dd40203c58ec26 2023-05-15T13:31:06+02:00 Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter Tamara D. Trouts Yu-Ping Chin 2015-05-01T00:00:00Z https://doi.org/10.12952/journal.elementa.000050 https://doaj.org/article/542566ca0abd4587a2dd40203c58ec26 EN eng BioOne http://elementascience.org/article/info:doi/10.12952/journal.elementa.000050 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000050 https://doaj.org/article/542566ca0abd4587a2dd40203c58ec26 Elementa: Science of the Anthropocene (2015) triclocarban photolysis DOM Environmental sciences GE1-350 article 2015 ftdoajarticles https://doi.org/10.12952/journal.elementa.000050 2022-12-31T12:18:53Z Abstract Photolysis is an important attenuation pathway for the removal of wastewater effluent organic micropollutants from surface waters. In this work, direct and indirect processes leading to the degradation of the disinfectant, triclocarban were studied. Photo-irradiation experiments were conducted in water collected from Old Woman Creek (OWC) a tributary of Lake Erie near Huron, OH, USA and in solutions of fulvic acids isolated from the Suwannee River, Georgia, USA (SRFA), Old Woman Creek (OWCFA) and Pony Lake, Antarctica (PLFA). Photodegradation of triclocarban proceeded faster in the presence of all three fulvic acids relative to deionized water. PLFA, an autochthonous dissolved organic matter (DOM) was found to be more reactive than the other fulvic acids, while the mostly allochthonous SRFA exhibited the lowest reactivity toward triclocarban. The later observation can be in part explained by anti-oxidant moieties present in SRFA. Photosensitized triclocarban degradation in whole water DOM from OWC was entirely attributable to the fulvic acid fraction and suggests that this component is the most photo-reactive fraction of the DOM. Anoxic and methanol-quenched experiments revealed unexpected results whereby the former suggests oxidation through reaction with triplet DOM, while the later is indicative of reaction with photo-generated hydroxyl radicals. It is possible that methanol can quench excited DOM species, which would shut down the triplet oxidation pathway. Finally, we observed no enhancement of triclocarban-photosensitized degradation through the addition of iron. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Pony Lake ENVELOPE(166.150,166.150,-77.550,-77.550) Suwannee River ENVELOPE(-100.046,-100.046,56.125,56.125) Elementa: Science of the Anthropocene 3 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
triclocarban photolysis DOM Environmental sciences GE1-350 |
spellingShingle |
triclocarban photolysis DOM Environmental sciences GE1-350 Tamara D. Trouts Yu-Ping Chin Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
topic_facet |
triclocarban photolysis DOM Environmental sciences GE1-350 |
description |
Abstract Photolysis is an important attenuation pathway for the removal of wastewater effluent organic micropollutants from surface waters. In this work, direct and indirect processes leading to the degradation of the disinfectant, triclocarban were studied. Photo-irradiation experiments were conducted in water collected from Old Woman Creek (OWC) a tributary of Lake Erie near Huron, OH, USA and in solutions of fulvic acids isolated from the Suwannee River, Georgia, USA (SRFA), Old Woman Creek (OWCFA) and Pony Lake, Antarctica (PLFA). Photodegradation of triclocarban proceeded faster in the presence of all three fulvic acids relative to deionized water. PLFA, an autochthonous dissolved organic matter (DOM) was found to be more reactive than the other fulvic acids, while the mostly allochthonous SRFA exhibited the lowest reactivity toward triclocarban. The later observation can be in part explained by anti-oxidant moieties present in SRFA. Photosensitized triclocarban degradation in whole water DOM from OWC was entirely attributable to the fulvic acid fraction and suggests that this component is the most photo-reactive fraction of the DOM. Anoxic and methanol-quenched experiments revealed unexpected results whereby the former suggests oxidation through reaction with triplet DOM, while the later is indicative of reaction with photo-generated hydroxyl radicals. It is possible that methanol can quench excited DOM species, which would shut down the triplet oxidation pathway. Finally, we observed no enhancement of triclocarban-photosensitized degradation through the addition of iron. |
format |
Article in Journal/Newspaper |
author |
Tamara D. Trouts Yu-Ping Chin |
author_facet |
Tamara D. Trouts Yu-Ping Chin |
author_sort |
Tamara D. Trouts |
title |
Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
title_short |
Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
title_full |
Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
title_fullStr |
Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
title_full_unstemmed |
Direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
title_sort |
direct and indirect photolysis of triclocarban in the presence of dissolved organic matter |
publisher |
BioOne |
publishDate |
2015 |
url |
https://doi.org/10.12952/journal.elementa.000050 https://doaj.org/article/542566ca0abd4587a2dd40203c58ec26 |
long_lat |
ENVELOPE(166.150,166.150,-77.550,-77.550) ENVELOPE(-100.046,-100.046,56.125,56.125) |
geographic |
Pony Lake Suwannee River |
geographic_facet |
Pony Lake Suwannee River |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Elementa: Science of the Anthropocene (2015) |
op_relation |
http://elementascience.org/article/info:doi/10.12952/journal.elementa.000050 https://doaj.org/toc/2325-1026 2325-1026 doi:10.12952/journal.elementa.000050 https://doaj.org/article/542566ca0abd4587a2dd40203c58ec26 |
op_doi |
https://doi.org/10.12952/journal.elementa.000050 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
3 |
_version_ |
1766015994278445056 |