Microbial Removal of Petroleum Hydrocarbons from Contaminated Soil under Arsenic Stress

The contamination of soils with petroleum and its derivatives is a longstanding, widespread, and worsening environmental issue. However, efforts to remediate petroleum hydrocarbon-polluted soils often neglect or overlook the interference of heavy metals that often co-contaminate these soils and occu...

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Bibliographic Details
Published in:Toxics (Basel) 2023-02, Vol.11 (2), p.143
Main Authors: Su, Qu, Yu, Jiang, Fang, Kaiqin, Dong, Panyue, Li, Zheyong, Zhang, Wuzhu, Liu, Manxia, Xiang, Luojing, Cai, Junxiong
Format: Article
Language:English
Subjects:
Alkanes
Arsenic
Bacteria
Biochemical tests
Biodegradation
Bioremediation
Carbon
Carbon sources
Chain branching
Crude oil
Degradation
Efficiency
Environmental aspects
Enzymes
Growth conditions
heavy metal stress
Heavy metals
Hydrocarbons
Metabolism
Metals
Microorganisms
Petroleum
petroleum hydrocarbon removal
Petroleum hydrocarbons
Pollutants
Polycyclic aromatic hydrocarbons
rRNA 16S
Sodium chloride
Soil contamination
Soil microbiology
Soil pollution
Soil remediation
Soil stresses
Soils
Strain
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Summary:The contamination of soils with petroleum and its derivatives is a longstanding, widespread, and worsening environmental issue. However, efforts to remediate petroleum hydrocarbon-polluted soils often neglect or overlook the interference of heavy metals that often co-contaminate these soils and occur in petroleum itself. Here, we identified baumannii strain JYZ-03 according to its Gram staining, oxidase reaction, biochemical tests, and FAME and rDNA gene sequence analyses and determined that it has the ability to degrade petroleum hydrocarbons. It was isolated from soil contaminated by both heavy metals and petroleum hydrocarbons. Strain JYZ-03 utilized diesel oil, long-chain n-alkanes, branched alkanes, and polycyclic aromatic hydrocarbons (PAHs) as its sole carbon sources. It degraded 93.29% of the diesel oil burden in 7 days. It also had a high tolerance to heavy metal stress caused by arsenic (As). Its petroleum hydrocarbon degradation efficiency remained constant over the 0-300 mg/L As(V) range. Its optimal growth conditions were pH 7.0 and 25-30 °C, respectively, and its growth was not inhibited even by 3.0% ( / ) NaCl. Strain JYZ-03 effectively bioremediates petroleum hydrocarbon-contaminated soil in the presence of As stress. Therefore, strain JYZ-03 may be of high value in petroleum- and heavy-metal-contaminated site bioremediation.
ISSN:2305-6304
2305-6304
DOI:10.3390/toxics11020143