Biodegradation potential of crude petroleum by hydrocarbonoclastic bacteria isolated from Soummam wadi sediment and chemical-biological proprieties of their biosurfactants

Drifa Yalaoui-Guella, Samira Fella-Temzi, Salima Djafri-Dib, Khodir Madani, Ibrahim Banat, Fatiha Brahmi

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Abstract

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.

Original languageEnglish
Article number106554
Pages (from-to)1-7
Number of pages7
JournalJournal of Petroleum Science and Engineering
Volume184
Early online date12 Oct 2019
DOIs
Publication statusPublished - 31 Jan 2020

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Keywords

  • Antimicrobial activity
  • Antioxidant activity
  • Biodegradation
  • Biosorption capacity of lead
  • Hydrocarbonoclastic bacteria

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