Characterization of Diesel Degrading Indigenous Bacterial Strains, and , Isolated from Oil Contaminated Soils.

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In this study, 13 diesel degrading bacteria were isolated from the oil contaminated soils and the promising strains identified as ED1 and BN were evaluated for their diesel degrading capabilities. These strains degraded the diesel optimally at 30 °C, pH 7.0 and 1% diesel concentration. Both the strains produced biofilm at 1% diesel concentration indicating their ability to tolerate diesel induced abiotic stress. Gravimetric analysis of the spent medium after 7 days of incubation showed that ED1 and BN degraded 68.61% and 76% diesel, respectively, while biodegradation reached more than 90% after 21 days. Fourier Transform Infrared (FTIR) analysis of the degraded diesel showed 1636.67 cm (C=C stretch, N-H bond) peak corresponding to alkenes and primary amines, while GC-TOF-MS analysis showed decline in hydrocarbon intensities after 7 days of incubation. The present study revealed that newly isolated ED1 and BN were able to degrade diesel hydrocarbons (C11-C18, and C19-C24) efficiently and have potential for bioremediation of the oil-contaminated sites.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s12088-024-01317-3.