Heavy metal contaminated farmland soil remediation agent, preparation method thereof and remediation method thereof

A soil remediation agent and heavy metal technology, which is applied in the field of preparation of heavy metal-contaminated farmland soil remediation agent, can solve the problems of being unsuitable for farmland use, prone to hardening, poor stability, etc., and is conducive to increasing production and income, reducing the degree of hardening, and reducing activity 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

However, the current soil solidification repair technology has problems such as poor stability after repair, easy cracking, and easy compaction, which is not suitable for farmland use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The heavy metal polluted farmland soil remediation agent of the embodiment of the present invention is made up of the raw material of following mass parts:

[0030] 17 parts of medical stone powder, 22 parts of carbonized rice husk, 14 parts of steel slag powder, 16 parts of weathered coal, 24 parts of lime, 18 parts of white carbon black, and 21 parts of organic fertilizer.

[0031] The preparation method of heavy metal polluted farmland soil remediation agent is:

[0032] (1) sieve after grinding of medical stone powder, carbonized rice husk, steel slag powder, weathered coal, and white carbon black raw materials, and mix to obtain a mixture;

[0033] (2) Add lime and an appropriate amount of water to the mixed material, stir until fully chelated;

[0034] (3) Then add organic fertilizer, mix uniformly to obtain semi-finished product;

[0035] (4) Take the semi-finished product and sieve it to obtain the heavy metal polluted farmland soil remediation agent.

Embodiment 2

[0037] The heavy metal polluted farmland soil remediation agent of the embodiment of the present invention is made up of the raw material of following mass parts:

[0038] 23 parts of medical stone powder, 22 parts of carbonized rice husk, 14 parts of steel slag powder, 11 parts of weathered coal, 13 parts of lime, 24 parts of white carbon black, and 21 parts of organic fertilizer.

[0039] The preparation method of heavy metal polluted farmland soil remediation agent is:

[0040] (1) sieve after grinding of medical stone powder, carbonized rice husk, steel slag powder, weathered coal, and white carbon black raw materials, and mix to obtain a mixture;

[0041] (2) Add lime and an appropriate amount of water to the mixed material, stir until fully chelated;

[0042] (3) Then add organic fertilizer, mix uniformly to obtain semi-finished product;

[0043] (4) Take the semi-finished product and sieve it to obtain the heavy metal polluted farmland soil remediation agent.

Embodiment 3

[0045] The heavy metal polluted farmland soil remediation agent of the embodiment of the present invention is made up of the raw material of following mass parts:

[0046] 22 parts of medical stone powder, 25 parts of carbonized rice husk, 13 parts of steel slag powder, 17 parts of weathered coal, 23 parts of lime, 21 parts of white carbon black, and 18 parts of organic fertilizer.

[0047] The preparation method of heavy metal polluted farmland soil remediation agent is:

[0048] (1) sieve after grinding of medical stone powder, carbonized rice husk, steel slag powder, weathered coal, and white carbon black raw materials, and mix to obtain a mixture;

[0049] (2) Add lime and an appropriate amount of water to the mixed material, stir until fully chelated;

[0050] (3) Then add organic fertilizer, mix uniformly to obtain semi-finished product;

[0051] (4) Take the semi-finished product and sieve it to obtain the heavy metal polluted farmland soil remediation agent.

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PUM

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Abstract

The invention provides a heavy metal contaminated farmland soil remediation agent. The heavy metal contaminated farmland soil remediation agent is prepared from, by weight, 10-25 parts of medical stone powder, 15-27 parts of carbonized rice husks, 10-25 parts of steel slag powder, 10-20 parts of weathered coal, 10-25 parts of lime, 10-25 parts of white carbon black and 12-24 parts of organic fertilizer. The heavy metal contaminated farmland soil remediation agent is applied to a soil surface of a heavy metal contaminated farmland and evenly mixed with soil, the soil moisture is kept to reach the maximum field water-holding capacity, and crops can be planted 5-8 days after balance. Heavy metals in the soil are quickly, efficiently and stably passivated through multiple modes such as combined precipitation, adsorption, complexing and acid-base buffering, the activity of the heavy metals in the soil is reduced, the passivated heavy metals are prevented from being activated again, and theeffect of finally reducing the activity of the heavy metals in the farmland soil is achieved.

Description

technical field [0001] The invention relates to the technical field of crop food safety control, in particular to a preparation method and a restoration method of a heavy metal-contaminated farmland soil restoration agent. Background technique [0002] The problem of farmland soil pollution is becoming more and more serious, and it is mainly caused by heavy metal pollution. The current soil heavy metal pollution remediation technologies mainly include soil leaching, electrodynamic remediation, biological remediation, and solidification remediation. [0003] Soil leaching is a method of removing pollutants in the soil by using water, surfactant solution, and inorganic salt solution as eluents. This method has a short repair period and high removal efficiency, but it has a large change in the physical and chemical properties of the soil. , the cost is higher and may cause secondary pollution. The electrodynamic remediation method makes the heavy metal pollutants in the soil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K17/08A01B79/02B09C1/00B09C1/08C09K101/00
CPCA01B79/02B09C1/00B09C1/08C05D3/02C09K17/08C09K17/40C09K2101/00Y02A40/22
Inventor 王存建董锡洪金峰周弋翔扈明云
Owner 纳琦绿能工程有限公司
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