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Remediation method for organic contaminated soil

A remediation method and organic pollution technology, applied in the field of contaminated soil remediation, can solve the problems of high cost of manpower and material resources, large amount of engineering, etc., and achieve the effect of small amount of engineering and saving manpower and material costs

Pending Publication Date: 2021-06-18
四川发展环境科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a method for remediating organically polluted soil, to solve the heat treatment method in the prior art, the soil needs to be transferred to heating equipment for heating to remove volatile organic pollutants, and the organic pollutants are removed and then treated After the soil backfilling, the engineering volume is large, and the technical problems of high cost of manpower and material resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for remediating organically polluted soil, comprising the steps of:

[0035] (1) Carry out detailed investigation on the organic low boiling point polluted site, find out the target pollutant (in this embodiment, the pollutant is benzene), sort out the pollution scope and pollution depth, and conduct site investigation according to the hydrogeological conditions of the organic low boiling point polluted site Generalized, organic low boiling point contaminated sites are divided into low-pollution areas, medium-pollution areas, and high-pollution areas according to the degree of pollution; the following four areas are divided in total:

[0036] Area 1: Low pollution area, the average concentration of benzene is 51.00mg / kg, and the pollution depth is 3.5m;

[0037] Area 2: Low pollution area, the average concentration of benzene is 57.00mg / kg, and the pollution depth is 3.5m;

[0038] Area 3: Medium pollution area, the average concentration of benzene is 86.00mg / ...

Embodiment 2

[0051] A method for remediating organically polluted soil, comprising the steps of:

[0052] (1) Carry out fine-grained investigation on organic low-boiling point polluted sites, find out the target pollutant (the pollutant in this example is toluene), sort out the scope and depth of pollution, and carry out site investigation according to the hydrogeological conditions of organic low-boiling point polluted sites. Generalized, organic low boiling point contaminated sites are divided into low-pollution areas, medium-pollution areas, and high-pollution areas according to the degree of pollution; the following four areas are divided in total:

[0053] Area 1: Low pollution area, the average concentration of toluene is 1400.00mg / kg, and the pollution depth is 3.6m;

[0054] Area 2: Low pollution area, the average concentration of toluene is 1358.00mg / kg, and the pollution depth is 3.6m;

[0055] Area 3: Medium pollution area, the average concentration of toluene is 1793.00mg / kg, ...

Embodiment 3

[0068] A method for remediating organically polluted soil, comprising the steps of:

[0069] (1) Carry out fine-grained investigation on the organic low-boiling point polluted site, find out the target pollutant (the pollutant in this embodiment is chlorobenzene), sort out the pollution scope and pollution depth, and carry out the investigation according to the hydrogeological conditions of the organic low-boiling point polluted site Site generalization, the organic low boiling point pollution site is divided into low pollution area, medium pollution area and high pollution area according to the degree of pollution; the following four areas are divided in total:

[0070] Area 1: Low pollution area, the average concentration of chlorobenzene is 275.00mg / kg, and the pollution depth is 3.2m;

[0071] Area 2: Low pollution area, the average concentration of chlorobenzene is 301.00mg / kg, and the pollution depth is 3.2m;

[0072] Area 3: Medium pollution area, the average concentra...

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Abstract

The invention discloses a remediation method for organic contaminated soil, and solves the technical problems that in a heat treatment method in the prior art, soil needs to be transferred into heating equipment to be heated to remove volatile organic pollutants, the treated soil is backfilled after the organic pollutants are removed, the work amount is large, and the cost of manpower and material resources is high. The method comprises the following steps of: (1) finding out a target pollutant, determining a pollution range and a pollution depth, and obtaining a low-pollution area, a medium-pollution area and a high-pollution area by division; (2) arranging a heating well, inserting a heating resistor and covering the heating well with a heat preservation film, and meanwhile, forming a waste gas extraction well; and (3) when the temperature of the heating resistor is increased to 40-60 DEG C, extracting steam waste gas through a waste gas extraction device, keeping the temperature at 180-220 DEG C, and continuously keeping the temperature for 25-40 days. According to the method, the step of earlier-stage contaminated soil transfer and the step of soil backfilling after later-stage treatment are omitted, the work amount is small, and the manpower and material resource costs are reduced.

Description

technical field [0001] The invention relates to the field of remediation of polluted soil, in particular to a remediation method of organic polluted soil. Background technique [0002] Soil pollution caused by excessive organic content in soil is called soil organic pollution. Organic pollutants in soil can be divided into two categories according to their solubility: ① easy to decompose, such as organophosphorus pesticides and chloral; ② difficult to decompose, such as organochlorine. Some organic pollutants can be converted into harmless substances under the action of organisms and abiotics, especially microorganisms, but a considerable part is still difficult to transform, causing crop yield reduction, and remaining in plants, becoming plant residues. [0003] Due to the burning of fossil fuels, oil spills, agricultural use of industrial sewage and sludge, dumping of industrial and agricultural solid waste, and the widespread use of pesticides, organic pollutants such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/06
CPCB09C1/005B09C1/062B09C2101/00
Inventor 杨秋林李春林赵栗笠苏蒙
Owner 四川发展环境科学技术研究院有限公司
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