Method for reducing volatile organic contaminant residue in soil in mechanical ventilation repair process

A volatile organic and mechanical ventilation technology, which is applied in the field of remediation of polluted soil, can solve the problems of easy volatilization and small range of pollutants, and achieve the effects of saving costs, speeding up the repair of volatiles, and saving consumption

CN103934262BActive Publication Date: 2015-01-07CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-01-07

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Abstract

The invention discloses a method for reducing volatile organic contaminant residue in the soil in a mechanical ventilation repair process. The method comprises the steps of firstly disturbing volatile organic contaminated soil to enable a volatile organic contaminant in the volatile organic contaminated soil to fully volatilize; when the volatile organic contaminated soil enters the repair trailing period, detecting the concentration of the volatile organic contaminant in the volatile organic contaminated soil; if the concentration of the volatile organic contaminant exceeds a repair target value, feeding quick lime into the volatile organic contaminated soil, continuously disturbing the volatile organic contaminated soil and carrying out intensive repair treatment; and if the concentration of the volatile organic contaminant reaches or is lower than the repair target value, finishing the repair work. By using the method, not only is the smearing of the contaminant in the soil obviously relieved or eliminated, the repair period shortened and further the residue concentration of the contaminant in the soil reduced, but also the amount of the fed quick lime is obviously reduced, so that the cost of the intensive treatment can be saved.
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Description

technical field

[0001] The invention relates to a method for repairing polluted soil, in particular to a method for reducing the residue of volatile organic pollutants in soil in a mechanical ventilation repair process. Background technique

[0002] Mechanical Soil Aeration is a soil remediation technology with simple operation, good effect and low cost. It is especially suitable for soil remediation of large-scale VOC-contaminated sites. It is especially worth noting that this technology is very economical and especially suitable for It is popularized and applied to developing countries where the high cost of soil remediation is unacceptable.

[0003] This process utilizes mechanical disturbance of polluted soil in a closed remediation greenhouse, and through means such as forced convection ventilation, to strengthen the escape of volatile organic compounds in the soil, and achieve the purpose of remediating volatile organic contaminated soil through the collection and trea...

Examples

Embodiment Construction

[0038] Such as figure 1 As shown, a method for reducing the residual volatile organic pollutants in the soil of the mechanical ventilation repair process provided by the embodiment of the present invention first disturbs the volatile organic polluted soil to fully volatilize the volatile organic pollutants in the volatile organic polluted soil ; When the volatile organic polluted soil enters the remediation tailing period, detect the concentration of volatile organic pollutants in the volatile organic polluted soil; collect soil samples at a certain time interval during the disturbance process, and a part of the gas pollutants is collected by the activated carbon filter device After treatment, it is discharged into the atmosphere, and the other part is connected to a portable gas chromatograph for real-time monitoring and analysis of gas components and concentrations; if the concentration of volatile organic pollutants exceeds the restoration target value, add quicklime to the ...