Petroleum pollution affects soil chemistry and reshapes the diversity and networks of microbial communities

Li, Yongquan; Li, Caili; Xiao, Ying; Huang, T.; Liu, Jin

doi:10.1016/j.ecoenv.2022.114129

Cited by 25 publications

(2 citation statements)

References 30 publications

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“…The microorganisms in aerobic reaction zone are mainly Proteobacteria , Firmicutes , Actinobacteria and Saccharibacteria . Proteobacteria are the dominant microorganisms in the three reaction zones, and Proteobacteria bacteria play an important role in the process of petroleum degradation ( Li et al, 2022 ; Xiao et al, 2022 ).…”

Section: Resultsmentioning

confidence: 99%

Efficiency and microbial community characteristics of strong alkali ASP flooding produced water treated by composite biofilm system

Dong

Zhang

et al. 2023

Front. Microbiol.

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Strong alkali alkali-surfactant-polymer (ASP) flooding produced water is a by-product of oil recovery, and it is a stable system composed of petroleum, polyacrylamide, surfactant, and inorganic salts. Efficient, green, and safe ASP produced water treatment technology is essential for oilfield exploitation and environmental protection. In this study, an anaerobic/anoxic/moving bed biofilm reactor with a microfiltration membrane was established and assessed for the real strong alkali ASP flooding produced water (pH 10.1–10.4) treatment. The results show that the average removal rates of COD, petroleum, suspended solids, polymers and surfactants in this process are 57, 99, 66, 40, and 44%, respectively. GC-MS results show that most of the organic compounds such as alkanes and olefins in the strong alkali ASP produced water are degraded. Microfiltration membrane can significantly improve the efficiency and stability of sewage treatment system. Paracoccus (AN), Synergistaceae (ANO) and Trichococcus (MBBR) are the main microorganisms involved in the degradation of pollutants. This study reveals the potential and adaptability of composite biofilm system in treating the produced water of strong alkali ASP produced water.

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Section: Resultsmentioning

confidence: 99%

Efficiency and microbial community characteristics of strong alkali ASP flooding produced water treated by composite biofilm system

Dong

Zhang

et al. 2023

Front. Microbiol.

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“…The soil samples collected in the experiment were from the loess high crude oil wellhead and nearby areas in Qingcheng County, Huachi County and Xifeng District in Changqing Oilfield (Qingyang City, Gansu Province) [19,22]. The oilcontaminated topsoil (0-20 cm) was collected as experimental soil, and the nearby unpolluted topsoil was collected as control soil (soil samples with less than 500 mg/kg of petroleum hydrocarbon content were regarded as clean soil).…”

Section: Sample Collectionmentioning

confidence: 99%

Metagenomics-metabolomics analysis of microbial function and metabolism in petroleum-contaminated soil

Xiao

et al. 2023

Braz J Microbiol

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Contamination of soil by petroleum is becoming increasingly serious in the world today. However, the research on gene functional characteristics, metabolites and distribution of microbial genomes in oil-contaminated soil is limited. Considering that, metagenomic and metabonomic were used to detect microbes and metabolites in oil-contaminated soil, and the changes of functional pathways were analyzed. We found that oil pollution significantly changed the composition of soil microorganisms and metabolites, and promoted the relative abundance of Pseudoxanthomonas, Pseudomonas, Mycobacterium, Immundisolibacter, etc. The degradation of toluene, xylene, polycyclic aromatic hydrocarbon and fluorobenzoate increased in Xenobiotics biodegradation and metabolism. Key monooxygenases and dioxygenase systems were regulated to promote ring opening and degradation of aromatic hydrocarbons. Metabolite contents of polycyclic aromatic hydrocarbons (PAHs) such as 9-fluoronone and gentisic acid increased significantly. The soil microbiome degraded petroleum pollutants into small molecular substances and promoted the bioremediation of petroleum-contaminated soil. Besides, we discovered the complete degradation pathway of petroleum-contaminated soil microorganisms to generate gentisic acid from the hydroxylation of naphthalene in PAHs by salicylic acid. This study offers important insights into bioremediation of oil-contaminated soil from the aspect of molecular regulation mechanism and provides a theoretical basis for the screening of new oil degrading bacteria.

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Distribution Characteristics, Source Analysis of Heavy Metal(oid)s, and Ecological and Health Risk Assessment around Shale Gas Extraction Platform in Sichuan, China

Wang,

Li,

et al. 2024

Water Air Soil Pollut

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Petroleum pollution affects soil chemistry and reshapes the diversity and networks of microbial communities

Cited by 25 publications

References 30 publications

Efficiency and microbial community characteristics of strong alkali ASP flooding produced water treated by composite biofilm system

Efficiency and microbial community characteristics of strong alkali ASP flooding produced water treated by composite biofilm system

Metagenomics-metabolomics analysis of microbial function and metabolism in petroleum-contaminated soil

Distribution Characteristics, Source Analysis of Heavy Metal(oid)s, and Ecological and Health Risk Assessment around Shale Gas Extraction Platform in Sichuan, China

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