| Title: | Microbial community composition and degradation potential of petroleum-contaminated sites under heavy metal stress |
| Author(s): | Wang X; Wang X; Wu F; Zhang J; Ai S; Liu Z; |
| Address: | "State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China. Electronic address: wangxn@craes.org.cn. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China. The College of Life Science, Nanchang University, Nanchang 330047, PR China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China; State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China. Electronic address: liuzt@craes.org.cn" |
| DOI: | 10.1016/j.jhazmat.2023.131814 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "Total petroleum hydrocarbons (n-alkanes), semi-volatile organic compounds, and heavy metals pose major ecological risks at petrochemical-contaminated sites. The efficiency of natural remediation in situ is often unsatisfactory, particularly under heavy metal pollution stress. This study aimed to verify the hypothesis that after long-term contamination and restoration, microbial communities in situ exhibit significantly different biodegradation efficiencies under different concentrations of heavy metals. Moreover, they determine the appropriate microbial community to restore the contaminated soil. Therefore, we investigated the heavy metals in petroleum-contaminated soils and observed that heavy metals effects on distinct ecological clusters varied significantly. Finally, alterations in the native microbial community degradation ability were demonstrated through the occurrence of petroleum pollutant degradation function genes in different communities at the tested sites. Furthermore, structural equation modeling (SEM) was used to explain the influence of all factors on the degradation function of petroleum pollution. These results suggest that heavy metal contamination from petroleum-contaminated sites reduces the efficiency of natural remediation. In addition, it infers that MOD1 microorganisms have greater degradation potential under heavy metal stress. Utilizing appropriate microorganisms in situ may effectively help resist the stress of heavy metals and continuously degrade petroleum pollutants" |
| Keywords: | "*Petroleum/toxicity/metabolism Soil/chemistry *Metals, Heavy/analysis Biodegradation, Environmental *Microbiota Hydrocarbons/metabolism *Soil Pollutants/metabolism Soil Microbiology Co-occurrence network Degradation pathways Heavy metals Microbial communi;" |
| Notes: | "MedlineWang, Xusheng Wang, Xiaonan Wu, Fan Zhang, Jiawen Ai, Shunhao Liu, Zhengtao eng Research Support, Non-U.S. Gov't Netherlands 2023/06/12 J Hazard Mater. 2023 Sep 5; 457:131814. doi: 10.1016/j.jhazmat.2023.131814. Epub 2023 Jun 9" |
