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dc.contributor.authorBrakstad, Odd Gunnar
dc.contributor.authorStørseth, Trond Røvik
dc.contributor.authorRønsberg, Marianne Unaas
dc.contributor.authorHansen, Bjørn Henrik
dc.date.accessioned2018-05-22T10:29:41Z
dc.date.available2018-05-22T10:29:41Z
dc.date.created2018-04-09T08:35:03Z
dc.date.issued2018-08
dc.identifier.citationChemosphere. 2018, 204 87-91.nb_NO
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/11250/2498675
dc.description.abstractHydrocarbon biodegradation may be slower in cold Arctic than in temperate seawater, and this will affect the toxicity time window of the hydrocarbons. In this study, the acute toxicities of water-soluble phases of 1,3-dimethylnaphthalene, phenanthrene, fluoranthene, and low energy water-accommodated fractions (LE-WAFs) of an evaporated (200 °C+) crude oil, were screened by a Microtox bioassay during biodegradation in cold seawater (4–5 °C). The water-solubility of fluoranthene was too low to provoke a toxic response at any time, whereas the toxicity of 1,3-dimethylnaphthalene and phenanthrene decreased over time in relation to biotransformation of these compounds. In LE-WAFs, the Microtox EC50 was associated with biodegradation of the predominant hydrocarbons (naphthalenes, 2- to 3-ring PAH), as well as with phenol degradation products. The acute toxicities of single hydrocarbons and LE-WAFs persisted for a longer period in the cold seawater than previously shown at higher seawater temperatures. These results suggest implications for fate and effects assessment of hydrocarbons after oil spills in cold environments, like the Arctic. However, further biodegradation studies using Arctic seawater and relevant species for toxicity testing are needed for confirmation.nb_NO
dc.language.isoengnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectBiodegradationnb_NO
dc.subjectSeawaternb_NO
dc.subjectAcute toxicitynb_NO
dc.subjectMicrotox assaynb_NO
dc.subjectWater-accommodated fractionsnb_NO
dc.subjectPAHnb_NO
dc.titleBiodegradation-mediated alterations in acute toxicity of water-accommodated fraction and single crude oil components in cold seawaternb_NO
dc.title.alternativeBiodegradation-mediated alterations in acute toxicity of water-accommodated fraction and single crude oil components in cold seawaternb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holder© 2018 Elsevier Ltd. All rights reserved. - Accepted manuscript © the author(s) 2018nb_NO
dc.source.pagenumber87-91nb_NO
dc.source.volume204nb_NO
dc.source.journalChemospherenb_NO
dc.identifier.doi10.1016/j.chemosphere.2018.04.032
dc.identifier.cristin1578225
cristin.unitcode7566,6,0,0
cristin.unitnameMiljøteknologi
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode1


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