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dc.contributor.authorLofthus, Synnøve
dc.contributor.authorAlmås, Inger Kjersti
dc.contributor.authorEvans, Peter
dc.contributor.authorPelz, Oliver
dc.contributor.authorBrakstad, Odd Gunnar
dc.date.accessioned2018-05-22T11:07:27Z
dc.date.available2018-05-22T11:07:27Z
dc.date.created2018-05-08T10:19:49Z
dc.date.issued2018-09
dc.identifier.citationChemosphere 206, September 2018, pages 465-473nb_NO
dc.identifier.issn0045-6535
dc.identifier.urihttp://hdl.handle.net/11250/2498689
dc.description.abstractOperational planned discharges of produced water (PW) to the marine environment from offshore oil production installations, contain low concentrations of dispersed oil compounds, like polycyclic aromatic hydrocarbons (PAH) and alkylated phenols (APs). Biotransformation in natural seawater (SW) of naphthalene/PAH and phenol/AP in field-collected PW from a North Sea platform was investigated in this biodegradation study. The PW was diluted in SW from a Norwegian fjord, and the biodegradation study was performed in slowly rotating carousels at environmental conditions (13⁰C) over a period of 62 days. Naphthalene/PAH and phenol/AP biotransformation was determined by first-order rate kinetics, after normalization against the recalcitrant biomarker 17α(H),21β(H)-Hopane. The results from this study showed total biotransformation half-lives ranging from 10 to 19 days for groups of naphthalenes and PAH, while half-lives for APs (C0- to C9-alkylated) were 10 to 14 days. Biotransformation half-lives of single components ranged from 8 to >100 days for naphthalenes and PAHs (median 16 days), and from 6 to 72 days (median 15 days) for phenols and AP. Four of the tested PAHs (chrysene, benzo(b)fluoranthene, benzo(e)pyrene, benzo(g,h,i,)perylene) and one AP (4-tert-butylphenol) showed biotransformation half-lives >50 days. This is one of a few studies that has investigated the potential for biodegradation of PW in natural SW. Methods and data from this study may be used as a part of Risk Based Approaches (RBA) for assessments of environmental fate of PW released to the marine environment and as part of the persistence related to risk.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectProduced waternb_NO
dc.subjectBiodegradationnb_NO
dc.subjectPAHnb_NO
dc.subjectAlkylphenolsnb_NO
dc.subjectSeawaternb_NO
dc.titleBiodegradation in seawater of PAH and alkylphenols from produced water of a North Sea Platformnb_NO
dc.title.alternativeBiodegradation in seawater of PAH and alkylphenols from produced water of a North Sea Platformnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holderCrown Copyright © 2018 Published by Elsevier Ltd. - Accepted manuscript © the author(s) 2018nb_NO
dc.source.journalChemospherenb_NO
dc.identifier.doi10.1016/j.chemosphere.2018.05.006
dc.identifier.cristin1584062
cristin.unitcode7566,0,0,0
cristin.unitcode7566,6,0,0
cristin.unitnameSINTEF Ocean
cristin.unitnameMiljøteknologi
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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