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Bioremediation of marine oil spills: when and when not--the Exxon Valdez experience.

Atlas R, Bragg J - Microb Biotechnol (2009)

Bottom Line: Where SSOR does remain, it is for the most part highly weathered, with 82% of 2007 samples indicating depletion of total polycyclic aromatic hydrocarbon (Total PAH) of >70% relative to EVOS oil.This SSOR is sequestered in patchy deposits under boulder/cobble armour, generally in the mid-to-upper intertidal zone.The relatively high nutrient concentrations measured at these sites, the patchy distribution and the weathering state of the SSOR suggest that it is in a form and location where bioremediation likely would be ineffective at increasing the rate of hydrocarbon removal.

View Article: PubMed Central - PubMed

Affiliation: University of Louisville, Louisville, KY 40292, USA. r.atlas@louisville.edu

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Bioremediation indices for samples collected in 2007 as function of pit elevation above mean low tide (MLLW). Samples least degraded reside in upper intertidal zone (A and B), while few were found that might respond to bioremediation in lower intertidal (C and D).
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f7: Bioremediation indices for samples collected in 2007 as function of pit elevation above mean low tide (MLLW). Samples least degraded reside in upper intertidal zone (A and B), while few were found that might respond to bioremediation in lower intertidal (C and D).

Mentions: Figure 7 shows further breakdown of the extent of Total PAH depletion as a function of tidal elevation [i.e. pit elevation above MLLW (mean low low water tide)]. Most samples with less than 70% Total PAH depletion are located at +2 and +3 m (middle to upper intertidal zone). Very few are located in the lower intertidal zone. This is not unexpected since SSOR at 0 and +1 m is exposed to water for much longer times.


Bioremediation of marine oil spills: when and when not--the Exxon Valdez experience.

Atlas R, Bragg J - Microb Biotechnol (2009)

Bioremediation indices for samples collected in 2007 as function of pit elevation above mean low tide (MLLW). Samples least degraded reside in upper intertidal zone (A and B), while few were found that might respond to bioremediation in lower intertidal (C and D).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3815841&req=5

f7: Bioremediation indices for samples collected in 2007 as function of pit elevation above mean low tide (MLLW). Samples least degraded reside in upper intertidal zone (A and B), while few were found that might respond to bioremediation in lower intertidal (C and D).
Mentions: Figure 7 shows further breakdown of the extent of Total PAH depletion as a function of tidal elevation [i.e. pit elevation above MLLW (mean low low water tide)]. Most samples with less than 70% Total PAH depletion are located at +2 and +3 m (middle to upper intertidal zone). Very few are located in the lower intertidal zone. This is not unexpected since SSOR at 0 and +1 m is exposed to water for much longer times.

Bottom Line: Where SSOR does remain, it is for the most part highly weathered, with 82% of 2007 samples indicating depletion of total polycyclic aromatic hydrocarbon (Total PAH) of >70% relative to EVOS oil.This SSOR is sequestered in patchy deposits under boulder/cobble armour, generally in the mid-to-upper intertidal zone.The relatively high nutrient concentrations measured at these sites, the patchy distribution and the weathering state of the SSOR suggest that it is in a form and location where bioremediation likely would be ineffective at increasing the rate of hydrocarbon removal.

View Article: PubMed Central - PubMed

Affiliation: University of Louisville, Louisville, KY 40292, USA. r.atlas@louisville.edu

Show MeSH