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Method for treating polluted soil and device

A technology of contaminated soil and treatment method, applied in the restoration of contaminated soil, etc., can solve the problems of long repair time, impact of repair effect, poor bioavailability, etc., and achieve the effect of reducing repair cost and shortening repair time

Inactive Publication Date: 2003-05-07
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current soil remediation technology is mostly applied to bioremediation, but bioremediation has its shortcomings, such as the remediation time is generally long, and the remediation effect is easily affected by factors such as the nature of pollutants, soil microbial structure, soil properties and environmental conditions. influences
Especially for toxic organic pollutants, due to their poor bioavailability, the effect of bioremediation is not ideal

Method used

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  • Method for treating polluted soil and device
  • Method for treating polluted soil and device
  • Method for treating polluted soil and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: In this example, the soil is polluted by the polycyclic aromatic hydrocarbon phenanthrene, the content of phenanthrene is 17 mg / kg, and the removal rate is 81.9% after 15 minutes of treatment according to the above steps. The detailed operating conditions and processing results are as follows:

[0028] 1. Operating conditions:

[0029] Ozone gas flow rate: 0.16 cm / s

[0030] Ozone concentration: 9.4 mg / L

[0031] Soil Moisture: 12%

[0032] Pollutant content: 17 mg (phenanthrene) / kg (dry soil)

[0033] Response time (minutes)

Embodiment 2

[0034] Example 2: In this example, the soil is polluted by polycyclic aromatic hydrocarbon anthracene, the content of anthracene is 100 mg / kg, and the removal rate is 80.4% after 40 minutes of treatment according to the above steps. The detailed operating conditions and processing results are as follows:

[0035] 1. Operating conditions:

[0036] Ozone gas flow rate: 0.40 cm / s

[0037] Ozone concentration: 3.4 mg / L

[0038] Soil moisture: 10%

[0039] Pollutant content: 100 mg (anthracene) / kg (dry soil)

[0040] Response time (minutes)

Embodiment 3

[0041] Embodiment 3: In this embodiment, the soil is polluted by 2-chlorophenol, and the content of 2-chlorophenol is 1000 mg / L. According to the above steps, the removal rate is 92.2% after 40 minutes of treatment. The detailed operating conditions and processing results are as follows:

[0042] 1. Operating conditions:

[0043] Ozone gas flow rate: 0.32 cm / s

[0044] Ozone concentration: 7.6 mg / L

[0045] Soil moisture: 10%

[0046] Pollutant content: 1000 mg (2-chlorophenol) / liter (soil moisture)

[0047] Response time (minutes)

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Abstract

A method for treating the polluted soil features that said polluted soil is treated by ozone for 10-60 min. Its treating equipment is composed of ozone generator. soil column treater and ozone tailing decomposer. The organic pollutant can be decomposed into CO2 ,water and the water-soluble and biodegradable intermediate.

Description

technical field [0001] The invention relates to a treatment method and equipment for polluted soil, which mainly utilizes ozone to carry out chemical oxidation repair on polluted soil, and is especially suitable for purifying soil polluted by organic substances (such as polycyclic aromatic hydrocarbons, etc.) that are difficult to degrade, poisonous and have poor bioavailability . Background technique [0002] With the development of production, more and more chemical pollutants are entering the soil system through various channels, such as the large-scale application of chemical fertilizers and pesticides, the leakage of crude oil during oil extraction, and the unreasonable landfill of toxic and harmful solid waste. serious pollution of the soil. Once the soil is polluted, it will not only directly affect crops but also threaten groundwater quality, so soil pollution has received more and more attention. The current soil remediation technology is mostly applied to bioreme...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 张晖
Owner WUHAN UNIV
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