This work aims to evaluate the biodegradation potential of petroleum by hydrocarbonoclastic bacteria isolated from Soummam wadi sediments. The chemical-biological properties of their biosurfactants products were also determined. Percentage of petroleum degraded by Rhodococcus ruber, Alcaligenes faecalis and Cellulosimicrobium sp. reached the maximum of 56.5 ± 1.2%, 52.7 ± 1.1% and 49.7 ± 1.2% respectively. Chemical profile study of the biosurfactants confirms their lipopeptide nature. The antifungal activity of these biosurfactants has given diameters of the zones of inhibition varying between 11.66 ± 0.57 mm and 18.33 ± 0.57 mm. The antioxidant activity showed a low activity for the antiradical power using the DPPH * and the molybdate test. The biosorption capacity of lead showed maximum biosorption of 74.91 ± 2.1 μg/g of Rhodococcus ruber biosurfactants. These bacterial isolates may find applications in bioremediation of petroleum spills. Thus their biosurfactants can furnish a choice to the current chemical compounds and they may find applications in biotechnologies.
Bibliographical noteFunding Information:
This work was supported by a grant from the Ministry of High Education and Scientific Research of Algeria . All authors thank everyone who contributed to the realization of this work.
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- Antimicrobial activity
- Antioxidant activity
- Biosorption capacity of lead
- Hydrocarbonoclastic bacteria