Biodegradation potential of residue generated during the in-situ burning of oil in the marine environment.

Autor: Pyke R; McGill University, Department of Natural Resource Sciences, Ste-Anne-de-Bellevue, QC, Canada., Fortin N; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada., Wasserscheid J; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada., Tremblay J; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada., Schreiber L; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada., Levesque MJ; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada., Messina-Pacheco S; McGill University, Department of Natural Resource Sciences, Ste-Anne-de-Bellevue, QC, Canada., Whyte L; McGill University, Department of Natural Resource Sciences, Ste-Anne-de-Bellevue, QC, Canada., Wang F; Centre for Earth Observation Science and Department of Environment and Geography, University of Manitoba, Winnipeg, MB, Canada., Lee K; Fisheries and Oceans Canada, Ottawa, ON, Canada., Cooper D; SL Ross Environmental Research Ltd., Ottawa, ON, Canada., Greer CW; McGill University, Department of Natural Resource Sciences, Ste-Anne-de-Bellevue, QC, Canada; National Research Council Canada, Energy, Mining and Environment Research Centre, Montréal, QC, Canada. Electronic address: Charles.Greer@cnrc-nrc.gc.ca.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2023 Mar 05; Vol. 445, pp. 130439. Date of Electronic Publication: 2022 Nov 21.
DOI: 10.1016/j.jhazmat.2022.130439
Abstrakt: The biodegradability of residues derived from in-situ burning, an oil spill response strategy which involves burning an oil slick on the sea surface, has not yet been fully studied. With a growing risk of oil spills, the fate of the persistent burn residue containing potentially toxic substances must be better understood. Microcosms were used to study the microbial community response and potential biodegradability of in-situ burn residues generated from Ultra Low Sulphur (ULS) marine diesel. Microcosm studies were conducted using residues originating from the burning of unweathered and weathered diesel, with the addition of a fertilizer and a dispersant. Burn residues were incubated for 6 weeks at 7 °C in natural seawater with continual agitation in the dark. Samples were subsequently sacrificed for chemistry as well as 16S rRNA gene amplicon and shotgun metagenomic sequencing. Chemistry analyses revealed a reduction in hydrocarbon concentrations. Medium chain-length n-alkanes (nC 16 -nC 24 ) decreased by 8% in unweathered burn residue microcosms and up to 26% in weathered burn residue microcosms. A significant decrease in polycyclic aromatic hydrocarbon (PAH) concentrations was observed only for naphthalene, fluorene and their alkylated homologs, in the microcosms amended with residue produced from burning weathered diesel. Decreases of 2-24%, were identified depending on the compound. Microcosms amended with burn residues had distinct microbial communities marked by an increase in relative abundance of putative hydrocarbon degraders as well as an increase of known hydrocarbon-degradation genes. These novel results suggest that if in-situ burning is performed on ULS marine diesel, some of the indigenous bacteria would respond to the newly available carbon source and some of the residual compounds would be biodegraded. Future studies involving longer incubation periods could give a better understanding of the fate of burn residues by shedding light on the potential biodegradability of the more recalcitrant residual compounds.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022. Published by Elsevier B.V.)
Databáze: MEDLINE
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