Enhanced remediation of oil-contaminated intertidal sediment by bacterial consortium of petroleum degraders and biosurfactant producers

文献类型： 外文期刊

第一作者： Zhou, Hanghai

作者： Zhou, Hanghai;Shen, Qi;Tang, Jiangwu;Liu, Qing;Jiang, Lijia;Chen, Chunlei;Zhang, Chunfang;Liu, Qing

作者机构：

关键词： Coastal ecosystem; Oil pollution; Bioremediation; Degrading consortium; Surfactant secretion; Microbial community

期刊名称：CHEMOSPHERE （ 影响因子：8.8； 五年影响因子：8.3 ）

ISSN： 0045-6535

年卷期： 2023 年 330 卷

页码：

收录情况： SCI

摘要： Oil pollution in intertidal zones is an important environmental issue that has serious adverse effects on coastal ecosystems. This study investigated the efficacy of a bacterial consortium constructed from petroleum degraders and biosurfactant producers in the bioremediation of oil-polluted sediment. Inoculation of the constructed consortium significantly enhanced the removal of C8-C40 n-alkanes (80.2 +/- 2.8% removal efficiency) and aromatic compounds (34.4 +/- 10.8% removal efficiency) within 10 weeks. The consortium played dual functions of petroleum degradation and biosurfactant production, greatly improving microbial growth and metabolic activities. Real-time quantitative polymerase chain reaction (PCR) showed that the consortium markedly increased the proportions of indigenous alkane-degrading populations (up to 3.88-times higher than that of the control treatment). Microbial community analysis demonstrated that the exogenous consortium activated the degradation functions of indigenous microflora and promoted synergistic cooperation among microorganisms. Our findings indicated that supplementation of a bacterial consortium of petroleum degraders and biosurfactant producers is a promising bioremediation strategy for oil-polluted sediments.

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