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Remediation agent for treating arsenic contaminated soil and usage of remediation agent

A technique for repairing medicaments and arsenic pollution, which is applied in the restoration of polluted soil, etc., and achieves the effects of simple preparation method, wide range of raw materials, and simple operation

Active Publication Date: 2012-11-07
YONKER ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings: large amount of engineering, high investment costs, damage to soil structure, and cause soil fertility to decline
However, there are disadvantages in this method: high repair costs, high energy consumption, and even secondary pollution
The disadvantages of this method: the treatment period is long, the later plant collection and treatment process is relatively complicated, and the maintenance management period is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Grind the raw materials potassium permanganate, ferric sulfate and bentonite into a material with a particle size of not less than 200 meshes, weigh according to mass percentage: potassium permanganate is 15%, ferric sulfate is 60%, and bentonite is 25%, then mix evenly, That is, the repairing agent is obtained.

Embodiment 2

[0045] Grind the raw materials potassium permanganate, ferric sulfate and bentonite into a material with a particle size of not less than 200 meshes, weigh according to the mass percentage: 7% of potassium permanganate, 43% of ferric sulfate, and 50% of bentonite, then mix evenly, That is, the repairing agent is obtained.

Embodiment 3

[0047] Grind the raw materials sodium hypochlorite, potassium perchlorate, ferric sulfate, ferric chloride, Portland cement and active pozzolan into materials with a particle size of not less than 200 mesh, mix sodium hypochlorite and potassium perchlorate in any proportion to form component A, and mix ferric sulfate and chlorine Mix ferric iron into component B according to any proportion, mix portland cement and active pozzolan into component C according to any proportion, and then weigh according to mass percentage: component A is 15%, component B is 40%, Component C is 45%, and then mixed evenly to obtain the repairing agent.

[0048] On the basis of Example 3, by changing the composition of components A, B, and C, many examples can be evolved, and the details will not be repeated.

[0049] The use method of repairing medicine Laboratory Example 1:

[0050] 100 kg of arsenic-contaminated soil was taken from a mining area in Shimen County, Hunan Province.

[0051] (1) Use...

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Abstract

The invention discloses a remediation agent for treating arsenic contaminated soil and a usage of the remediation agent. The remediation agent comprises the following raw materials by mass: 5-30% of oxidant, 30-70% of iron-based compound and 10-60% of mineral material. The raw materials are respectively ground into materials with particle size not smaller than 200 meshes and are mixed uniformly according to the proportion. The usage of the remediation agent for treating the arsenic contaminated soil comprises the following steps that: the arsenic content and the leaching toxicity of the to-be-treated contaminated soil are detected; the remediation agent with different ratios according to the degree of contamination is paved on the surface of the to-be-treated soil; the soil is turned over and uniformly mixed to form the mixed soil; the water content in the mixed soil is kept not to be less than 25% by adding water; a moisturizing material is covered on the mixed soil; and the mixed soil is cured for at least 5 days in order to allow the remediation agent in the mixed soil to be reacted with unstable arsenic in the heavy metal contaminated soil; and the generated insoluble arsenate sediment is stabilized, so that the cured soil can meet the environment protection requirements.

Description

Technical field [0001] The present invention involves environmental protection technology fields, especially a repairing agent and usage method for repairing heavy metal arsenic pollution soil for the treatment of arsenic pollution soil. Background technique [0002] With the development of industry and agriculture and the widely used application of arsenic substances, arsenic residues in the process of mining, processing, use, and waste treatment are left in the soil, causing a lot of arsenic pollution in the world.Arsenic is very harmful to human health. When high concentration, it can kill cells immediately, or even life -threatening.Therefore, the treatment and repair of arsenic pollution soil have attracted more and more attention.At present, arsenic pollution soil repair technology mainly includes the following: [0003] 1 Engineering repair method: The project repair method mainly includes the method of customer soil, the change of soil change and the method of turning th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 谢伦专易新建刘前进陈爱军周斌
Owner YONKER ENVIRONMENTAL PROTECTION
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