IMPACTS OF PETROLEUM HYDROCARBONS BIODEGRADATION IN OIL-CONTAMINATED SOIL AFTER PRE-OXIDATION WITH THREE BATCHS H<sub>2</sub>O<sub>2</sub> ADDITION

XU Jinlan; YANG Zhengli

doi:10.13205/j.hjgc.202302017

Volume 41 Issue 2

Feb. 2023

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XU Jinlan, YANG Zhengli. IMPACTS OF PETROLEUM HYDROCARBONS BIODEGRADATION IN OIL-CONTAMINATED SOIL AFTER PRE-OXIDATION WITH THREE BATCHS H2O2 ADDITION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 122-130. doi: 10.13205/j.hjgc.202302017

Citation:

XU Jinlan, YANG Zhengli. IMPACTS OF PETROLEUM HYDROCARBONS BIODEGRADATION IN OIL-CONTAMINATED SOIL AFTER PRE-OXIDATION WITH THREE BATCHS H₂O₂ ADDITION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 122-130. doi: 10.13205/j.hjgc.202302017

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IMPACTS OF PETROLEUM HYDROCARBONS BIODEGRADATION IN OIL-CONTAMINATED SOIL AFTER PRE-OXIDATION WITH THREE BATCHS H₂O₂ ADDITION

doi: 10.13205/j.hjgc.202302017

XU Jinlan^{1,2
,
,},
YANG Zhengli^1,2

1. School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. Shaanxi Key Laboratory of Environmental Engineering, Xi'an 710055, China

Received Date: 2022-03-06
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

To obtain a remediation method of Fenton pre-oxidation combined with bioremediation of oil-contaminated soil for efficient degradation of petroleum hydrocarbons (TPH), the characteristics of hydroxyl radical (·OH), NH⁺₄-N concentration, DOC concentration, dehydrogenase and polyphenol oxidase activities and TPH removal with dosing different concentration of H₂O₂ by three batches were investigated in this study. The results showed that the maximum instantaneous intensity and duration of ·OH were low, the bacteria destruction was low and TPH oxidation was high after pre-oxidation with 900 mmol/L H₂O₂ (4.635 mL) by three batches dosing. The NH⁺₄-N consumption (170.45 mg/kg) was high and the quantity of hydrocarbon-degrading microorganisms increased rapidly, then long-chain alkanes C₂₁ to C₃₀ (22%) and DOC (69%) degradation were high at the first 20 days in bio-remediation. Therefore, hydrocarbon degraders were induced to degrade long-alkane (42%) in 0 to 50 days by sufficient NH⁺₄-N concentration consumption in the early bio-remediation stage. The activities of dehydrogenase and polyphenol oxidase reached a peak on the 20th day, indicating that the metabolic activity of microorganisms increased, and petroleum hydrocarbon degradation mainly occurred in this period.
- Fenton pre-oxidation,
- NH⁺₄-N,
- long-chain alkane,
- bio-remediation,
- enzyme activity

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References(34)

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