scholarly journals Biodegradation of Crude Oil and Corexit 9500 in Arctic Seawater

2018 ◽  
Vol 9 ◽  
Author(s):  
Kelly M. McFarlin ◽  
Matt J. Perkins ◽  
Jennifer A. Field ◽  
Mary B. Leigh
Keyword(s):  
Crude Oil ◽  
Corexit 9500

Biodegradability of Corexit 9500 and Dispersed South Louisiana Crude Oil at 5 and 25 °C

2013 ◽  
Vol 47 (4) ◽  
pp. 1960-1967 ◽  
Author(s):  
Pablo Campo ◽  
Albert D. Venosa ◽  
Makram T. Suidan
Keyword(s):  
Crude Oil ◽  
Corexit 9500 ◽  
South Louisiana

Kinetic modeling and half life study on bioremediation of crude oil dispersed by Corexit 9500

2011 ◽  
Vol 185 (2-3) ◽  
pp. 1027-1031 ◽  
Author(s):  
Mohammad Ali Zahed ◽  
Hamidi Abdul Aziz ◽  
Mohamed Hasnain Isa ◽  
Leila Mohajeri ◽  
Soraya Mohajeri ◽  
...  
Keyword(s):  
Crude Oil ◽  
Kinetic Modeling ◽  
Half Life ◽  
Life Study ◽  
Corexit 9500

Innate immunity and antioxidant systems in different tissues of sea bass (Dicentrarchus labrax) exposed to crude oil dispersed mechanically or chemically with Corexit 9500

2015 ◽  
Vol 120 ◽  
pp. 270-278 ◽  
Author(s):  
Matthieu Dussauze ◽  
Morgane Danion ◽  
Stéphane Le Floch ◽  
Philippe Lemaire ◽  
Karine Pichavant-Rafini ◽  
...  
Keyword(s):  
Innate Immunity ◽  
Crude Oil ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Antioxidant Systems ◽  
Corexit 9500 ◽  
Different Tissues

scholarly journals The Interactive Effects of Crude Oil and Corexit 9500 on Their Biodegradation in Arctic Seawater

2020 ◽  
Vol 86 (21) ◽  
Author(s):  
Taylor R. Gofstein ◽  
Matthew Perkins ◽  
Jennifer Field ◽  
Mary Beth Leigh
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Crude Oil ◽  
Microbial Communities ◽  
Microbial Community Structure ◽  
Interactive Effects ◽  
The Arctic ◽  
Corexit 9500 ◽  
Span 80 ◽  
Over Time

ABSTRACT The risk of petroleum spills coupled with the potential application of chemical dispersants as a spill response strategy necessitates further understanding of the fate of oil and dispersants and their interactive effects during biodegradation. Using Arctic seawater mesocosms amended with either crude oil, Corexit 9500, or both together, we quantified the chemical losses of crude oil and Corexit 9500 and identified microbial taxa implicated in their biodegradation based on shifts in the microbial community structure over a 30-day time course. Chemical analyses included total petroleum hydrocarbons (TPH), n-alkanes, branched alkanes, and polycyclic aromatic hydrocarbons (PAHs) for oil loss and the surfactant components dioctyl sodium sulfosuccinate (DOSS), Span 80, Tween 80, Tween 85, and the DOSS metabolite ethylhexyl sulfosuccinate (EHSS) for Corexit loss. Changes to the microbial communities and identification of key taxa were determined by 16S rRNA gene amplicon sequencing. The nonionic surfactants of Corexit 9500 (Span 80 and Tweens 80 and 85) biodegraded rapidly, dropping to below the limits of detection within 5 days and prior to any detectable initiation of oil biodegradation. This resulted in no observable suppression of petroleum biodegradation in the presence of Corexit compared to that of oil alone. In contrast, biodegradation of DOSS was delayed in the presence of oil, based on the prolonged presence of DOSS and accumulation of the degradation intermediate EHSS that did not occur in the absence of oil. Microbial analyses revealed that oil and Corexit enriched different overall microbial communities, with the presence of both resulting in a community composition that shifted from one more similar to that of Corexit only to one reflecting the oil-only community over time, in parallel with the degradation of predominantly Corexit and then oil components. Some microbial taxa (Oleispira, Pseudofulvibacter, and Roseobacter) responded to either oil or Corexit, suggesting that some organisms may be capable of utilizing both substrates. Together, these findings reveal interactive effects of crude oil and Corexit 9500 on chemical losses and microbial communities as they biodegrade, providing further insight into their fate when copresent in the environment. IMPORTANCE Chemical dispersants such as Corexit 9500 are commonly used in oil spill response and are currently under consideration for use in the Arctic, where their fate and effects have not been well studied. This research was performed to determine the interactive effects of the copresence of crude oil and Corexit 9500 on the degradation of components from each mixture and the associated microbial community structure over time in Arctic seawater. These findings will help yield a better understanding of the biodegradability of dispersant components applied to an oil spill, the temporal microbial community response to dispersed oil, and the fundamental microbial ecology of organic contaminant biodegradation processes in the Arctic marine environment.

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