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Heavy metal contaminated soil remediation method

A technology for polluted soil and heavy metals, applied in the restoration of polluted soil and other directions, can solve the problems of secondary pollution, difficult treatment and high cost, and achieve the effect of good adsorption, improvement of fertility and growth activity.

Active Publication Date: 2017-06-13
广州富生源环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is understood that the causes of heavy metal pollution in soil are complex, including industrial discharge, use of chemical fertilizers and pesticides, and mining, etc. It is very difficult to treat by physical and chemical means, and it is easy to cause secondary pollution
[0004] Therefore, it is urgent to study new treatment methods in the field of soil heavy metal pollution control. Although the existing physical and chemical restoration methods are effective, they will bring multiple secondary pollution, high cost, and great environmental disturbance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of method of controlling heavy metal polluted soil, comprises the following steps:

[0019] (1) Heavy metal detection: Multi-regional layered sampling is carried out in the soil containing heavy metals that needs to be repaired. The sampling path includes vertical sampling and horizontal sampling, and then the heavy metal content of the samples is detected by atomic absorption spectrometry. The heavy metal content is divided into individual governance modules according to different levels, and then a hierarchical governance plan is adopted for different heavy metal content modules;

[0020] (2) Stabilization of heavy metals: isolate the treatment modules divided in step (1) from each other. The size of the treatment module is a rectangle of 2*3m, and the width of the isolation area is 30cm. Remove the debris on the surface of the soil and evenly spray heavy metals on the surface of the soil Stabilizer, the volume ratio of the spraying amount to the ...

Embodiment 2

[0024] Embodiment 2: a kind of method of controlling heavy metal polluted soil, comprises the following steps:

[0025] (1) Heavy metal detection: Multi-regional layered sampling is carried out in the soil containing heavy metals that needs to be repaired. The sampling path includes vertical sampling and horizontal sampling, and then the heavy metal content of the samples is detected by atomic absorption spectrometry. The heavy metal content is divided into individual governance modules according to different levels, and then a hierarchical governance plan is adopted for different heavy metal content modules;

[0026] (2) Stabilization of heavy metals: isolate the treatment modules divided in step (1) from each other. The size of the treatment modules is a rectangle of 2*3m, and the width of the isolation area is 40cm. Remove the debris on the surface of the soil and evenly spray heavy metals on the surface of the soil. Stabilizer, the volume ratio of the spraying amount to th...

Embodiment 3

[0030] Embodiment 3: a kind of method of controlling heavy metal polluted soil, comprises the following steps:

[0031] (1) Heavy metal detection: Multi-regional layered sampling is carried out in the soil containing heavy metals that needs to be repaired. The sampling path includes vertical sampling and horizontal sampling, and then the heavy metal content of the samples is detected by atomic absorption spectrometry. The heavy metal content is divided into individual governance modules according to different levels, and then a hierarchical governance plan is adopted for different heavy metal content modules;

[0032] (2) Stabilization of heavy metals: isolate the treatment modules divided in step (1) from each other. The size of the treatment module is a rectangle of 2*3m, and the width of the isolation area is 50cm. Remove the debris on the surface of the soil and evenly spray heavy metals on the surface of the soil Stabilizer, the volume ratio of the spraying amount to the ...

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Abstract

The invention discloses a heavy metal contaminated soil remediation method. According to the method, the content of heave metal in soil is more accurately measured through vertical sampling and horizontal sampling; animal bone meal in added heavy metal stabilizers has a good adsorption function on heavy metal ions; the chemical activity of the heavy metal ions can be cured under the comprehensive actions of sodium dihydrogen phosphate, sodium lignosulfonate, potassium chloride and hydroxyapatite, the adsorbed heavy metal ions and other biological nutrient substances are absorbed by rootstocks of seleng wormwood; soil improvers are added to prohibit harmful bacteria in the soil under the action of microorganisms and other active substances; and the fertility and the growth activity of the soil are improved through liquid microbial fertilizer. According to the method, under the combined actions of phytoremediation, physicochemical remediation and soil performance improvement, the heavy metal contaminated soil is controlled effectively through microbial fermentation, liquid fertilizer and other measures.

Description

technical field [0001] The invention belongs to the technical field of heavy metal polluted soil treatment, and specifically relates to a method for treating heavy metal polluted soil. Background technique [0002] Soil heavy metal pollution means that the content of trace metal elements in the soil exceeds the background value, and the content caused by excessive deposition is too high, collectively referred to as soil heavy metal pollution. Heavy metals refer to metals with a specific gravity equal to or greater than 5.0, such as Fe, Mn, Zn, Cd, Hg, Ni, Co, etc.; due to the addition of metals to the soil by human activities, the heavy metals in the soil are significantly higher than the original content, and cause ecological problems. deterioration of environmental quality. The harm caused by heavy metal pollution to the soil is very serious, especially affecting the development of plant roots and leaves, and destroying the human nervous system, immune system, and skeleta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08B09C1/10
Inventor 胡大苇
Owner 广州富生源环保工程有限公司
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