Abstract:
:Macondo source oils and artificially weathered oil residues from 150 °C+ to 300 °C+, including artificially photo oxidized oils, were prepared and used for generating low energy water accommodated fractions (LE-WAFs) in order to assess the impact of oil weathering on WAF chemistry composition and toxicity to marine organisms. Two pelagic species representing primary producers (the marine algae Skeletonema pseudocostatum) and invertebrates (the marine copepod Acartia tonsa) were tested. Obtained acute toxicity levels, expressed as EC/LC50 values, were in the same range or above the obtained maximum WAF concentrations for WAFs from most weathering degrees. Based on % WAF dilutions, reduced toxicity was determined as a function of weathering. The chemical compositions of all WAFs were compared to compositions obtained from water samples reported in the GRIIDC database using multivariate analysis, indicating that WAFs of photo oxidized and two field weathered oils resembled the field data the most.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Faksness LG,Altin D,Størseth TR,Nordtug T,Hansen BHdoi
10.1016/j.marenvres.2020.104928subject
Has Abstractpub_date
2020-05-01 00:00:00pages
104928eissn
0141-1136issn
1879-0291pii
S0141-1136(19)30646-4journal_volume
157pub_type
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