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Article Dans Une Revue World Journal of Microbiology and Biotechnology Année : 2010

Total mineralization of 2-ethylhexyl nitrate by bacterial cocultures

Résumé

2-Ethylhexyl nitrate (2-EHN) is a widely-used chemical which is commonly added to diesel oil to boost its cetane index. The 2-EHN molecule is recalcitrant to biodegradation but still utilized as sole carbon source by Mycobacterium austroafricanum IFP 2173. The incomplete degradation of 2-EHN by this strain results in the accumulation of an intermediary metabolite i.e. 4-ethyldihydrofuran-2(3H)-one (4-EDF). The study aimed at isolating 4-EDF degraders in order to achieve total mineralization of 2-EHN in cocultures with M. austroafricanum IFP 2173. Bacterial isolates were obtained from diesel-contaminated soil by enrichment in serial cultures supplemented with 4-EDF, the degradation of which was monitored by CO(2) measurements. Two strains were isolated and identified as Bacillus cereus and Burkholderia sp., respectively. Complete mineralization of 2-EHN was achieved by associating M. austroafricanum IFP 2173 with either bacterial isolate in cocultures. In the context of environmental acceptability, efficient degradation of a potentially persistent pollutant by a bacterial consortium is demonstrated.
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Dates et versions

hal-01144930 , version 1 (23-04-2015)

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Elodie Nicolau, Giustina Gabriella Della, Yves Jouanneau, Rémy Marchal. Total mineralization of 2-ethylhexyl nitrate by bacterial cocultures. World Journal of Microbiology and Biotechnology, 2010, 26 (11), pp.2113-2116. ⟨10.1007/s11274.010.0395.6⟩. ⟨hal-01144930⟩
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