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Soil petroleum hydrocarbon contamination remediation device and remediation method

A remediation method, petroleum hydrocarbon technology, applied in the field of soil remediation, can solve the problems of expensive construction, expression and cultivation of engineering strains, easy to destroy soil nutrients, etc., and achieve the effect of low cost, high safety and high removal rate

Active Publication Date: 2021-11-30
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Microbial remediation is a technology that has been vigorously developed, but the construction, expression and culture of engineering strains are relatively expensive
[0006] The chemical oxidation method has a high removal efficiency for petroleum hydrocarbons in the soil, and the cost is low, but it also has the disadvantage of easily destroying soil nutrients

Method used

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  • Soil petroleum hydrocarbon contamination remediation device and remediation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Petroleum hydrocarbon-contaminated soil was obtained from the third oil production plant of Tianjin Dagang Oilfield. The collected contaminated soil samples were air-dried and pulverized. Sampling test showed that the total petroleum hydrocarbon content was 5092 mg / kg, and the remaining part was sterilized and dried to obtain a soil sample to be repaired.

[0063] Iris was planted in red soil for 3 months, the whole plant was pulled out, washed with deionized water, soaked in 0.01M dilute hydrochloric acid for 1 hour, dried and chopped, dried at 60°C, placed in a muffle furnace, and Nitrogen was introduced, and then the temperature was programmed to rise to 720°C at a rate of 6°C / min, and held for 60 minutes to obtain a modified biochar material with nanometer zero-valent iron average loading as iron-rich biochar.

[0064] Take part of the soil samples to be repaired and move them into flowerpots, mix iron-rich biochar with 20g / kg of soil, then spray 0.1g / L potassium p...

Embodiment 2

[0066] Iris was planted in red soil for 3 months, the whole plant was pulled out, washed with deionized water, soaked in 0.01M dilute hydrochloric acid for 1 hour, dried and chopped, dried at 70°C, placed in a muffle furnace, and Nitrogen was introduced, and then the temperature was programmed to 800°C at a rate of 8°C / min, and held for 55 minutes to obtain a modified biochar material with nanometer zero-valent iron average loading as iron-rich biochar.

[0067] Take part of the soil samples to be repaired in Example 1 and move them into flowerpots, mix iron-rich biochar with 20g / kg of soil, place them in a constant temperature box at 25 degrees Celsius, and water them every other day to keep the soil moist.

[0068] After 10 days, add microbial compound bacterial agent wherein, it is by 1.0 * 10 8 cfu / mL Bacillus pumilus (Shandong Nuojie Biotechnology Co., Ltd.), 1.0×10 8 cfu / mL Klebsiella michigans (Beijing Kezhan Biotechnology Co., Ltd.) and 1.0 × 10 7 cfu / mL Pseudomonas ...

Embodiment 3

[0071] Take part of the soil samples to be repaired in Example 1 and move them into a 20cm × 60cm rectangular planting tank, mix the iron-rich biochar obtained in Example 1 with the amount of 20g / kg soil, and spray 0.1g with the amount of 3g / kg soil / L potassium persulfate solution, placed in a sunny greenhouse at 25-30 degrees Celsius, watered every other day to keep the soil moist.

[0072] After 7 days, add microbial compound bacterial agent wherein, it is by 1.0 * 10 8 cfu / mL Bacillus pumilus (Shandong Nuojie Biotechnology Co., Ltd.), 1.0×10 8 cfu / mL Klebsiella michigans (Beijing Kezhan Biotechnology Co., Ltd.) and 1.0 × 10 7 cfu / mL Pseudomonas stutzeri (Beijing Kezhan Biotechnology Co., Ltd.) was mixed at a volume ratio of 2:2:1, and the amount added was 50ml / kg soil.

[0073] Then weave a straw layer about 5 cm thick with dry straw on the pot soil, leave 8 holes about 6 cm x 6 cm evenly, transplant iris under each hole, and water the next day.

[0074] After 60 days, ...

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Abstract

The invention discloses a soil petroleum hydrocarbon remediation device and remediation method, through combined use of iron-rich sodium charcoal, an oxidizing agent, microorganisms and / or plant iris tectorum, a good remediation effect can be achieved on petroleum hydrocarbon contaminated soil, especially under the condition of combined use of the oxidizing agent, the remediation effect is remarkably improved, the soil cannot be damaged, and the remediation effect is good. The remediation method provided by the invention is easy to operate, low in cost, free of secondary pollution to soil, high in safety, capable of effectively performing in-situ remediation and high in petroleum hydrocarbon removal rate.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a soil petroleum hydrocarbon remediation device and method. Background technique [0002] Petroleum is one of our main energy sources. Along with the exploitation, transportation, loading and unloading, storage, processing and use of petroleum, the problem of soil pollution caused by petroleum leakage and discharge becomes more and more prominent. [0003] The main components of petroleum are petroleum hydrocarbons, or hydrocarbons. Its degradation rate is low in the soil natural environment. Due to the leakage and discharge rate exceeding its degradation rate, it accumulates in the soil, which in turn affects plants, animals and even humans. [0004] There is no doubt that soil is the most precious wealth of human beings. The research on remediation of petroleum hydrocarbon-contaminated soil has become a hot spot since the 1980s. The remediation technologies for soil...

Claims

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Application Information

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IPC IPC(8): B09C1/10B09C1/08B09C1/00
CPCB09C1/10B09C1/08B09C1/00
Inventor 席北斗王雷李翔张亚丽张众磊牛永超李彤彤徐剑锋王杨杨杨茹月
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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