Biodegradation of oil spill dispersant surfactants in cold seawater
While biodegradation of chemically dispersed oil has been well documented, only a few studies have focused on the degradation of the dispersant compounds themselves. The objective of this study was to determine the biodegradation of dispersant surfactants in cold seawater, relevant for deep sea or A...
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ftsintef:oai:sintef.brage.unit.no:11250/2498697 2023-05-15T15:09:27+02:00 Biodegradation of oil spill dispersant surfactants in cold seawater Brakstad, Odd Gunnar Størseth, Trond Røvik Brunsvik, Anders Bonaunet, Kristin Faksness, Liv Guri 2018 application/pdf http://hdl.handle.net/11250/2498697 https://doi.org/10.1016/j.chemosphere.2018.04.051 eng eng Chemosphere. 2018, 204 290-293. urn:issn:0045-6535 http://hdl.handle.net/11250/2498697 https://doi.org/10.1016/j.chemosphere.2018.04.051 cristin:1578887 Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2018 Elsevier Ltd. All rights reserved - Accepted manuscript © the author(s) 2018 CC-BY-NC-ND 290-293 204 Chemosphere Oil spill dispersants Surfactants Biotransformation Seawater Low temperature Journal article Peer reviewed 2018 ftsintef https://doi.org/10.1016/j.chemosphere.2018.04.051 2021-08-04T11:59:06Z While biodegradation of chemically dispersed oil has been well documented, only a few studies have focused on the degradation of the dispersant compounds themselves. The objective of this study was to determine the biodegradation of dispersant surfactants in cold seawater, relevant for deep sea or Arctic conditions. Biotransformation of the surfactants dioctyl-sodium sulfosuccinate (DOSS), Tween 80, Tween 85, and α/β-ethylhexylsulfosuccinate (EHSS, expected DOSS hydrolysis product) in the commercial dispersants Corexit 9500, Dasic Slickgone NS and Finasol OSR52 were determined. The biotransformation studies of the surfactants were performed in natural seawater at 5 °C over a period of 54 days without oil present. The surfactants were tested at concentrations of 1, 5, and 50 mg/L, the lower concentration being as close as possible to expected field concentrations. Experiments with dispersants concentrations of 1 mg/L resulted in rapid biotransformation of Tween 80 and Tween 85, with depletion after 8 days, while DOSS showed rapid biotransformation after a lag period of 16 days. The degradation half-life of DOSS increased from 4.1 days to >500 days as Corexit 9500 concentrations went from 1 mg/L to 50 mg/L, emphasizing the importance of performing experiments at dispersant concentrations as close as possible to environmentally relevant concentrations. EHSS showed limited degradation compared to other surfactants. This study shows that the surfactants DOSS, Tween 80 and Tween 85 in the three chemical dispersants studied are biodegradable in cold seawater, particularly in environmentally relevant concentrations acceptedVersion Article in Journal/Newspaper Arctic SINTEF Open (Brage) Arctic Chemosphere 204 290 293 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Oil spill dispersants Surfactants Biotransformation Seawater Low temperature |
spellingShingle |
Oil spill dispersants Surfactants Biotransformation Seawater Low temperature Brakstad, Odd Gunnar Størseth, Trond Røvik Brunsvik, Anders Bonaunet, Kristin Faksness, Liv Guri Biodegradation of oil spill dispersant surfactants in cold seawater |
topic_facet |
Oil spill dispersants Surfactants Biotransformation Seawater Low temperature |
description |
While biodegradation of chemically dispersed oil has been well documented, only a few studies have focused on the degradation of the dispersant compounds themselves. The objective of this study was to determine the biodegradation of dispersant surfactants in cold seawater, relevant for deep sea or Arctic conditions. Biotransformation of the surfactants dioctyl-sodium sulfosuccinate (DOSS), Tween 80, Tween 85, and α/β-ethylhexylsulfosuccinate (EHSS, expected DOSS hydrolysis product) in the commercial dispersants Corexit 9500, Dasic Slickgone NS and Finasol OSR52 were determined. The biotransformation studies of the surfactants were performed in natural seawater at 5 °C over a period of 54 days without oil present. The surfactants were tested at concentrations of 1, 5, and 50 mg/L, the lower concentration being as close as possible to expected field concentrations. Experiments with dispersants concentrations of 1 mg/L resulted in rapid biotransformation of Tween 80 and Tween 85, with depletion after 8 days, while DOSS showed rapid biotransformation after a lag period of 16 days. The degradation half-life of DOSS increased from 4.1 days to >500 days as Corexit 9500 concentrations went from 1 mg/L to 50 mg/L, emphasizing the importance of performing experiments at dispersant concentrations as close as possible to environmentally relevant concentrations. EHSS showed limited degradation compared to other surfactants. This study shows that the surfactants DOSS, Tween 80 and Tween 85 in the three chemical dispersants studied are biodegradable in cold seawater, particularly in environmentally relevant concentrations acceptedVersion |
format |
Article in Journal/Newspaper |
author |
Brakstad, Odd Gunnar Størseth, Trond Røvik Brunsvik, Anders Bonaunet, Kristin Faksness, Liv Guri |
author_facet |
Brakstad, Odd Gunnar Størseth, Trond Røvik Brunsvik, Anders Bonaunet, Kristin Faksness, Liv Guri |
author_sort |
Brakstad, Odd Gunnar |
title |
Biodegradation of oil spill dispersant surfactants in cold seawater |
title_short |
Biodegradation of oil spill dispersant surfactants in cold seawater |
title_full |
Biodegradation of oil spill dispersant surfactants in cold seawater |
title_fullStr |
Biodegradation of oil spill dispersant surfactants in cold seawater |
title_full_unstemmed |
Biodegradation of oil spill dispersant surfactants in cold seawater |
title_sort |
biodegradation of oil spill dispersant surfactants in cold seawater |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2498697 https://doi.org/10.1016/j.chemosphere.2018.04.051 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
290-293 204 Chemosphere |
op_relation |
Chemosphere. 2018, 204 290-293. urn:issn:0045-6535 http://hdl.handle.net/11250/2498697 https://doi.org/10.1016/j.chemosphere.2018.04.051 cristin:1578887 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no © 2018 Elsevier Ltd. All rights reserved - Accepted manuscript © the author(s) 2018 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.chemosphere.2018.04.051 |
container_title |
Chemosphere |
container_volume |
204 |
container_start_page |
290 |
op_container_end_page |
293 |
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1766340646392561664 |