The dynamic change of microbial communities in crude oil contaminated soils from oilfields in China

Jia, Jianli and Zong, Shuang and Hu, Lei and Shi, Shaohe and Zhai, Xiaobo and Wang, Bingbing and Li, Guanghe and Zhang, Dayi (2017) The dynamic change of microbial communities in crude oil contaminated soils from oilfields in China. Soil and Sediment Contamination: An International Journal, 26 (2). pp. 171-183. ISSN 1549-7887

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Abstract

To study the biodegradability of microbial communities in crude oil contamination, crude oil-contaminated soil samples from different areas of China were collected. Using polyphasic approach, this study explored the dynamic change of the microbial communities during natural accumulation in oilfield and how the constructed bioremediation systems reshape the composition of microbial communities. The abundance of oil-degrading microbes was highest when oil content was 3%–8%. This oil content is potentially optimal for oil-degrading bacteria proliferate. During a ∼12 months natural accumulation, the quantity of oil-degrading microbes increased from 105 to 108 cells/g of soil. A typical sample of Liaohe (LH, oil-contaminated site near Liaohe river, Liaoning Province, China) was remediated for 50 days to investigate the dynamic change of microbial communities. The average FDA (a fluorescein diacetate approach) activities reached 0.25 abs/h·g dry soil in the artificially enhanced repair system, 32% higher than the 0.19 abs/h·g dry soil in natural circumstances. The abundance of oil-degrading microbes increased steadily from 0.001 to 0.068. During remediation treatment, oil content in the soil sample was reduced from 6.0% to 3.7%. GC-MS analysis indicated up to 67% utilization of C10–C20 normal paraffin hydrocarbons, the typical compounds that undergo microbial degradation.

Item Type:
Journal Article
Journal or Publication Title:
Soil and Sediment Contamination: An International Journal
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2307
Subjects:
ID Code:
83501
Deposited By:
Deposited On:
13 Jan 2017 10:22
Refereed?:
Yes
Published?:
Published
Last Modified:
22 Nov 2020 04:34