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Biodegradation of Crude Oil by a Newly Isolated Strain Rhodococcus sp. JZX-01
Authors:Chen Li  Zheng-Xi Zhou  Xiao-Qiang Jia  Yu Chen  Jiao Liu  Jian-Ping Wen
Institution:1. Department of Biological Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People’s Republic of China
2. Department of Environmental Science, School of Environmental Science and Technology, Tianjin University, Tianjin, 300072, People’s Republic of China
3. China Offshore Environmental Services Ltd, Tianjin Economic Development Zone, Tianjin, 300452, People’s Republic of China
Abstract:A highly efficient oil-degrading bacteria JZX-01 was isolated from the oil-contaminated soil of the seacoast near the Boxi Offshore Oil Field of China. Morphological, physiological, and 16S rDNA gene sequence analyses indicated that JZX-01 was assigned to the genus Rhodococcus sp. This strain decomposed 65.27?±?5.63 % of the crude oil in 9 days. Gas chromatography–mass spectrometry analysis showed that even the long-chain hydrocarbons (C31–C38) and branched alkanes (pristine and phytane), which were regarded as the stubborn ones, could be degraded. Further study showed that the bacteria still has good oil degradation ability at low temperatures as well as under high salt conditions. Moreover, JZX-01 was found to have a biosurfactant-producing capacity, which significantly favors the surface tension reduction and crude oil degradation. The promising isolated strain Rhodococcus sp. JZX-01 could be further used for the bioremediation of oil-polluted soil or seawater in a wide range of temperatures and high salt conditions.
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