Document Detail

Comparative mesocosm study of biostimulation efficiency in two different oil-amended sub-antarctic soils.
MedLine Citation:
PMID:  18074169     Owner:  NLM     Status:  MEDLINE    
Biological treatment has become increasingly popular as a remediation method for soils and groundwater contaminated with petroleum hydrocarbon, chlorinated solvents, and pesticides. Bioremediation has been considered for application in cold regions such as Arctic and sub-Arctic climates and Antarctica. Studies to date suggest that indigenous microbes suitable for bioremediation exist in soils in these regions. This paper reports on two case studies at the sub-Antarctic Kerguelen Island in which indigenous bacteria were found that were capable of mineralizing petroleum hydrocarbons in soil contaminated with crude oil and diesel fuel. All results demonstrate a serious influence of the soil properties on the biostimulation efficiency. Both temperature elevation and fertilizer addition have a more significant impact on the microbial assemblages in the mineral soil than in the organic one. Analysis of the hydrocarbons remaining at the end of the experiments confirmed the bacterial observations. Optimum temperature seems to be around 10 degrees C in organic soil, whereas it was higher in mineral soil. The benefit of adding nutrients was much stronger in mineral than in the organic soil. Overall, this study suggests that biostimulation treatments were driven by soil properties and that ex situ bioremediation for treatment of cold contaminated soils will allow greater control over soil temperature, a limiting factor in cold climates.
Daniel Delille; Frédéric Coulon
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-12-12
Journal Detail:
Title:  Microbial ecology     Volume:  56     ISSN:  0095-3628     ISO Abbreviation:  Microb. Ecol.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-06-30     Completed Date:  2008-09-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7500663     Medline TA:  Microb Ecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  243-52     Citation Subset:  IM    
Laboratoire Arago, Observatoire Océanologique de Banyuls, Université P. et M. Curie UMR-CNRS 7621, 66650, Banyuls sur mer cedex, France.
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MeSH Terms
Antarctic Regions
Bacteria / growth & development*,  metabolism
Biodegradation, Environmental
Hydrocarbons / metabolism*
Petroleum* / metabolism
Rosaceae / growth & development
Soil / analysis
Soil Microbiology*
Soil Pollutants / metabolism
Reg. No./Substance:
0/Fertilizers; 0/Gasoline; 0/Hydrocarbons; 0/Petroleum; 0/Soil; 0/Soil Pollutants

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