期刊
MARINE POLLUTION BULLETIN
卷 150, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2019.110787
关键词
In-situ bioremediation; PAHs; Heavy mental; Sediment; Evaluation
资金
- Shandong Province Key Research and Development Program of China (Public Welfare Project) [2019GSF109081]
- Key Projects in the Yantai Science & Technology Pillar Program [2018ZHGY079]
- Project of on-site sediment microbial remediation of public area of central Bohai Sea, North China Sea Branch of State Oceanic Administration [QDZC20150420-002]
- Inter cooperation, CAS, Chinese-foreign cooperation in key projects [133337KYSB20160002]
Owing to the semi-enclosed environment of the Bohai Sea, the ecological effects caused by an oil spill would be significant. A typical in- situ bioremediation engineering project for of oil-spilled marine sediments was performed in the Bohai Sea and a quantitative assessment of the ecological restoration was performed. The bioremediation efficiencies of n-alkane and PAHs in the sediment are 32.84 +/- 21.66% and 50.42 +/- 17.49% after 70 days of bioremediation, and 60.99 +/- 10.14% and 68.01 +/- 18.60% after 210 days, respectively. After 210 days of bioremediation, the degradation rates of two- to three ring PAHs and four-ring PAHs are 84.44 +/- 23.03% and 26.62 +/- 43.76%, respectively. In addition, the concentrations of the heavy metals first increased by 6.00% due to oil spill degradation and release, and then decreased by 72.60% with the degradation of oil caused by bioremediation or vertical migration. According to the continuous tracking monitoring, the composition of the microbial community in the restored area was similar to that in the control area and the clean area in Bohai Sea after 210 days of bioremediation. These results may provide some theoretical and scientific data to understand the degradation mechanism and assessing the ecological remediation efficiency for oil spills in open sea areas.
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