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| Reference : Crude oil bioremediation in sub-Antarctic intertidal sediments: chemistry and toxicity o... |
| Scientific journals : Article | |||
| Human health sciences : Pharmacy, pharmacology & toxicology Life sciences : Aquatic sciences & oceanology Life sciences : Environmental sciences & ecology | |||
| http://hdl.handle.net/2268/2090 | |||
| Crude oil bioremediation in sub-Antarctic intertidal sediments: chemistry and toxicity of oiled residues | |
| English | |
| Pelletier, Emilien [> > > >] | |
| Delille, Daniel [> > > >] | |
Delille, Bruno  [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >] | |
| May-2004 | |
| Marine Environmental Research | |
| Elsevier Sci Ltd | |
| 57 | |
| 4 | |
| 311-327 | |
| International | |
| 0141-1136 | |
| Oxford | |
| [en] crude oil ; bioremediation ; Antarctica ; sediments ; fertilizers ; effectiveness ; toxicity ; hydrocarbon degrading bacteria ; surfactants ; dry fish compost | |
| [en] The effectiveness of fertilizers for crude oil bioremediation in sub-Antarctic intertidal sediments was tested over a one-year period in a series of ten (10) experimental enclosures. Chemical, microbial and toxicological parameters demonstrated the effectiveness of various fertilizers in a pristine environment where hydrocarbon degrading bacteria (HDB) had not been stimulated by previous accidental spills or human activities. The low temperature of seawater (3-4 degreesC) had no obvious effects on the HDB community and the bioremediation process. Over 90% of n-alkanes were degraded in the first six months and most light aromatics (2-3 rings) disappeared during the first year of observation. The toxicity of oiled residues (Microtox(R) SP) was significantly reduced in the first 6 months of the process, but it increased again in the last months of the experiment. One of the fertilizers containing fishbone compost enriched with urea, inorganic phosphorus and a lipidic surfactant reduced significantly the toxicity of oil residues in the last 3 months of the experiment. Interstitial waters collected below the oil slicks during the remediation showed no toxicity, and even stimulated Vibrio fischeri. When comparing all fertilizers to the control plots, a good correlation (r(2) = 0.82) was found between the growth rate of HDB and the degradation rate of n-alkanes in the first 90 days of the experiment only indicating that fertilizers were efficient for at least 3 months but their beneficial effects were lost after 6 months. (C) 2003 Elsevier Ltd. All rights reserved. | |
| Institut Paul-Emile Victor ; National Sciences and Engineering Research Council of Canada | |
| Researchers | |
| http://hdl.handle.net/2268/2090 | |
| 10.1016/j.marenvres.2003.07.001 |
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