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Curing and stabilizing repairing agent for contaminated soil and repairing method thereof

A technology of polluted soil and remediation method, which is applied to the restoration of polluted soil, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of long processing time, low remediation efficiency, high technical energy consumption, etc., and achieves a simple preparation method. Easy operation, quick repair process, and obvious repair effect

Inactive Publication Date: 2020-04-10
纳琦绿能工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cement kiln co-processing technology consumes a lot of energy and costs high; the leaching technology consumes a large amount of leaching agent, and improper leaching is easy to cause secondary pollution; although phytoremediation is environmentally friendly and does not cause secondary pollution, the cost is low, but The processing time is long and the restoration efficiency is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A solidification and stabilization restoration agent for polluted soil. The solidification and stabilization restoration agent is made of the following raw materials in parts by weight: 32 parts of calcium salt, 14 parts of steel slag, 12 parts of reduced aluminum powder and 28 parts of silicate minerals;

[0051] Grind calcium salt, steel slag, reduced aluminum powder and silicate minerals into powders respectively, and mix the powders of calcium salt, steel slag, aluminum oxide and silicate minerals evenly according to the ratio of parts by mass to obtain a solidified and stabilized repair agent .

[0052] Wherein, the calcium salt is calcium oxalate.

[0053] Described steel slag is processed gained by following method:

[0054] (1) Take the steel slag discharged from the blast furnace, first add acid soaking to the steel slag raw material for pickling pretreatment, the pickling solution is an aqueous solution of hydrochloric acid or sulfuric acid, the pH value of t...

Embodiment 2

[0068] A curing and stabilizing restoration agent for polluted soil, the solidification and stabilization restoration agent is made of the following raw materials in parts by weight: 41 parts of calcium salt, 15 parts of steel slag, 11 parts of reduced aluminum powder and 22 parts of silicate minerals;

[0069] Grind calcium salt, steel slag, reduced aluminum powder and silicate minerals into powders respectively, and mix the powders of calcium salt, steel slag, aluminum oxide and silicate minerals evenly according to the ratio of parts by mass to obtain a solidified and stabilized repair agent .

[0070] Wherein, the calcium salt is mixed in equal proportions with calcium carbonate and calcium hydroxide.

[0071] Described steel slag is processed gained by following method:

[0072] (1) Take the steel slag discharged from the blast furnace, first add acid soaking to the steel slag raw material for pickling pretreatment, the pickling solution is an aqueous solution of hydroch...

Embodiment 3

[0086] A solidification and stabilization restoration agent for polluted soil. The solidification and stabilization restoration agent is made of the following raw materials in parts by weight: 44 parts of calcium salt, 13 parts of steel slag, 13 parts of reduced aluminum powder and 23 parts of silicate minerals;

[0087] Grind calcium salt, steel slag, reduced aluminum powder and silicate minerals into powders respectively, and mix the powders of calcium salt, steel slag, aluminum oxide and silicate minerals evenly according to the ratio of parts by mass to obtain a solidified and stabilized repair agent .

[0088] Wherein, the calcium salt is calcium sulfate.

[0089] Described steel slag is processed gained by following method:

[0090] (1) Take the steel slag discharged from the blast furnace, first add acid soaking to the steel slag raw material for pickling pretreatment, the pickling solution is an aqueous solution of hydrochloric acid or sulfuric acid, the pH value of t...

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Abstract

The invention provides a curing and stabilizing repairing agent for contaminated soil. The curing and stabilizing repairing agent is prepared from the following raw materials in parts by weight: 30-47parts of calcium salt, 10-16 parts of steel slag, 10-15 parts of reduced aluminum powder and 20-35 parts of silicate minerals. The calcium salt, steel slag, reduced aluminum powder and silicate minerals are crushed into powder, and the powder of the calcium salt, the steel slag, the aluminum oxide and the silicate minerals are proportionally and uniformly mixed in parts by mass to obtain the curing and stabilizing repairing agent. The raw materials are green raw materials which are environment-friendly, low in cost and stable in property, the preparation method is simple and easy to implement, the repairing process is fast, and the repairing effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for thermal desorption remediation of organic-contaminated soil. Background technique [0002] Soil heavy metal pollution refers to human activities, the content of trace metal elements in the soil exceeds the background value, and the excessive content caused by excessive deposition is collectively referred to as soil heavy metal pollution. [0003] Heavy metal elements are potential pollutants, which are difficult to be degraded by soil microorganisms. At present, the general characteristics of heavy metal pollution in agricultural soil in my country are that the degree of pollution is gradually intensified, the area of ​​pollution is expanding year by year, and the pollution sources are showing a trend of diversification. [0004] In the prior art, conventional remediation methods for soil heavy metal pollution include technical measures such as ...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/12
CPCB09C1/08C09K17/12
Inventor 周弋翔董锡洪金峰王存建扈明云
Owner 纳琦绿能工程有限公司
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