Effects of petroleum contamination on soil microbial numbers, metabolic activity and urease activity

Chemosphere
Huan GuoBrunello Ceccanti

Abstract

The influence of petroleum contamination on soil microbial activities was investigated in 13 soil samples from sites around an injection water well (Iw-1, 2, 3, 4) (total petroleum hydrocarbons (TPH): 7.5-78 mg kg(-1)), an oil production well (Op-1, 2, 3, 4, 5) (TPH: 149-1110 mg kg(-1)), and an oil spill accident well (Os-1, 2, 3, 4) (TPH: 4500-34600 mg kg(-1)). The growth rate constant (μ) of glucose stimulated organisms, determined by microcalorimetry, was higher in Iw soil samples than in Op and Os samples. Total cultivable bacteria and fungi and urease activity also decreased with increasing concentration of TPH. Total heat produced demonstrated that TPH at concentrations less than about 1 g kg(-1) soil stimulated anaerobic respiration. A positive correlation between TPH and soil organic matter (OM) and stimulation of fungi-bacteria-urease at low TPH doses suggested that TPH is bound to soil OM and slowly metabolized in Iw soils during OM consumption. These methods can be used to evaluate the potential of polluted soils to carry out self-bioremediation by metabolizing TPH.

References

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Citations

Nov 28, 2012·Bulletin of Environmental Contamination and Toxicology·Wen Wen SheChang Shun Song
Jun 20, 2015·Environmental Science and Pollution Research International·Xiaoxi ZhangXiaobo Liu
Feb 26, 2016·Environmental Science. Processes & Impacts·Xiaoxi ZhangXiao Liang
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Aug 29, 2020·Environmental Monitoring and Assessment·Swati MauryaSeema Makhija
Aug 18, 2020·Environmental Science and Pollution Research International·Mir Md Abdus SalamPertti Pulkkinen
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Nov 15, 2020·Environmental Science and Pollution Research International·Macdonald Ogorm MafianaShi-Weng Li
Mar 27, 2020·Journal of Hazardous Materials·Yuanbo LiZhenjun Sun

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