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In-situ ex-situ remediation method for contaminated soil

A technology for ex-situ remediation of contaminated soil, applied in the field of in-situ ex-situ remediation of contaminated soil, can solve the problems of many equipment, high site requirements, and high processing costs, and achieve the effects of low requirements, low cost and short cycle.

Inactive Publication Date: 2021-03-05
纳琦绿能工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] More equipment is required, the requirements for the operation site are high, and the processing cost is high

Method used

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  • In-situ ex-situ remediation method for contaminated soil

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Embodiment 1

[0023] The land is mainly used after demolition and relocation, mainly heavy metal pollution. The use of after repairing the land is construction land.

[0024] The original paleo repair method of the contaminated soil of the present invention is adopted, including the following steps:

[0025] Step (1), excavation of the soil of the contaminated area;

[0026] Step (2), for soil sampling and detection of the bottom and sidewalls of the excavated area, check whether the pollutant test results reach the specified standard threshold, if it does not meet the standard, continue excavation and detection until the detection of the standard; The final depth is 80 cm.

[0027] Step (3), the soil water content of the excavated soil is more than 40%, the water content of 40 cm is greater than 40%, first drying and losing until the aphille is not more than 40%;

[0028] Then crushed and sieved the soil excavated; sieved to a particle diameter of no more than 2 mm.

[0029] Step (4), the laye...

Embodiment 2

[0039] After the industrial park is relocated, the land is mainly heavy metal pollution. The use of after repairing the land is construction land.

[0040] The original paleo repair method of the contaminated soil of the present invention is adopted, including the following steps:

[0041] Step (1), excavation of the soil of the contaminated area;

[0042] Step (2), the soil sampling and detection of the bottom and sidewalls of the excavated area, see if the pollutant test results reach the standard threshold, such as not rejected, continue excavation and detection until the detection of the standard;

[0043] The depth of excavation is one meter to meet the standard.

[0044] Step (3), detecting the soil water content of the excavated soil, after the excavation is about 40 cm, it has gradually increased and greater than 40%, then the first drying and loosen until the aphillement rate is not more than 40%;

[0045] Then crushed and sieved the soil excavated; sieved to a particle d...

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Abstract

The invention provides an in-situ ex-situ remediation method for contaminated soil. The method comprises the steps: excavating soil in a contaminated area; excavating and detecting the bottom and theside wall of the excavated area until the detection result reaches the standard; detecting the water content of the excavated soil, if the water content is greater than 40%, performing airing and scarifying, and then crushing and sieving the excavated soil; uniformly paving the sieved soil in an excavated area layer by layer; ploughing and uniformly mixing the soil remediation agent and the soil;after the treatment period of the soil remediation agent, if a preset remediation target is not reached, paving the excavated soil layer by layer again, paving a reinforced soil remediation agent on each layer of soil, and performing uniform mixing until a detection result reaches the remediation target; and rolling the excavated area by using a soil compactor, applying a fertilizer to the surfacelayer, performing ploughing, and planting restoration plants. According to the method, special soil remediation equipment is not needed, the requirement for an operation site is not high, the cost islow, and the period is short.

Description

Technical field [0001] The present invention relates to the technical field of contaminated soil, which is specifically a primary paleo repair method for contaminated soil. Background technique [0002] Generally contaminated soil heteropathic repair, it is to put eluent in the soil excavated, or put into repair removal of contaminants. The general cycle is longer, and it is necessary to put drugs multiple times, or special equipment assist, such as ultrasonic treatment, and the like. [0003] There are more equipment required, and the job is high, and the cost is high. Inventive content [0004] It is an object of the present invention to provide a native land heteropatically repairing method of contaminated soil, convenient to operate, short cycle, low cost, and not high. [0005] In order to achieve the above object, the present invention provides the following technical solutions: [0006] Landly paleem repair method for contaminated soil, including the following steps: [0...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/08
CPCB09C1/00B09C1/10B09C1/08B09C1/105
Inventor 吕森伟林宝达金峰骆芳萍董锡洪
Owner 纳琦绿能工程有限公司
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