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Method for treating soil organic matter and mercury combined contamination

A technology of complex pollution and organic matter, applied in the field of soil pollution remediation, can solve the problem of mercury not easily volatilized, achieve the effect of strengthening the separation process, efficient in-situ remediation, and saving investment costs

Inactive Publication Date: 2017-06-20
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest problem with this method is that it needs to continuously introduce air, and when it is used for organic matter-mercury compound pollution, mercury is not easy to volatilize, and it is necessary to strengthen the separation process through heat radiation and strong negative pressure

Method used

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  • Method for treating soil organic matter and mercury combined contamination
  • Method for treating soil organic matter and mercury combined contamination
  • Method for treating soil organic matter and mercury combined contamination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1), select 5m × 5m of organic matter and mercury composite polluted soil plots, carry out the detection of the total amount of volatile organic compounds and the total mercury content before treatment; remove weeds and stones on the surface of the plots, and compact them with a rolling device to make them The surface of the contaminated soil plot forms a compact level ground;

[0030] (2), adopt low-density polyethylene film to cover described polluted soil plot, then compact with rolling device so that low-density polyethylene film is close to the polluted soil surface;

[0031] (3), drill vertically downwards with a drilling rig in the center of the polluted soil plot to form a cylindrical tunnel with a depth of 15 m and a diameter of 0.2 m; insert a 10 m long, Single-ended heating rod with a diameter of 25mm;

[0032] (4) Connect the cylindrical channel to the vacuum pump, drier, activated carbon adsorber and exhaust cylinder in turn through the pipeline, and conne...

Embodiment 2

[0037] (1), select 5m × 5m of organic matter and mercury composite polluted soil plots, carry out the detection of the total amount of volatile organic compounds and the total mercury content before treatment; remove weeds and stones on the surface of the plots, and compact them with a rolling device to make them The surface of the contaminated soil plot forms a compact level ground;

[0038] (2), adopt low-density polyethylene film to cover described polluted soil plot, then compact with rolling device so that low-density polyethylene film is close to the polluted soil surface;

[0039] (3), in the center of the polluted soil plot, use a drilling rig to drill vertically downwards to form a cylindrical tunnel with a depth of 10m and a diameter of 0.2m; insert a 10m long, Single-ended heating rod with a diameter of 25mm;

[0040] (4) Connect the cylindrical channel to the vacuum pump, dryer, activated carbon adsorber and exhaust cylinder in turn through the pipeline, and conne...

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Abstract

The invention provides a method for treating soil organic matter and mercury combined contamination. The method comprises the steps that firstly, weeds and stones on the surface of a contaminated plot are removed, and the soil is pressed by a rolling compaction device; the contaminated plot is covered with a low-density polyethylene film, and the low-density polyethylene film is tightly pressed through the rolling compact device; vertically downward drilling is conducted on the center of the contaminated plot through a drilling machine, and a cylindrical pore channel is formed; single-head heating rods are vertically inserted into the four corners of the contaminated plot downwards; the cylindrical pore channel is sequentially connected with a vacuum pump, a drying device, an activated carbon adsorption device and an exhaust cylinder through a pipeline; and the vacuum pump and the heating rods are started, and organic matter and mercury in the soil are separated under the effect of thermal radiation and vacuum pumping. By means of the method, it is not necessary to introduce air continuously, the separation process is enhanced through the thermal radiation and high negative pressure effect, and the efficient in-site repair is achieved.

Description

[0001] Technical field: [0002] The invention relates to the technical field of soil pollution remediation, in particular to a treatment method for compound pollution of soil organic matter and mercury. [0003] technical background: [0004] Soil organic pollution means that after toxic and harmful organic substances enter the soil, their quantity and speed exceed the speed of soil purification, destroying the natural dynamic balance, making the accumulation process of pollutants gradually dominant, resulting in the normal dysfunction of the soil. Soil quality declines and affects crop growth and development, as well as yield and quality declines. [0005] At present, the volatile organic pollutants-heavy metal compound pollution in the soil is very common. The dumping of sludge and industrial waste residue from sewage treatment plants has caused a large amount of soil compound pollution. In the polluted sites of petroleum, chemical, coking and other enterprises, the pollutan...

Claims

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Application Information

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IPC IPC(8): B09C1/06B09C1/00
CPCB09C1/06B09C1/00B09C2101/00
Inventor 张柏林周艳易师
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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