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Heavy metal agricultural soil remediation method

A technology of soil remediation and soil remediation agent, which is applied in the field of heavy metal agricultural soil remediation, can solve the problems of lack of research on the simultaneous existence of multiple heavy metals, and achieve the effect of reducing the content of heavy metals, improving the structure, and remediating excellent results

Inactive Publication Date: 2020-03-24
宁波丰科源农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many studies on the treatment of single heavy metal-contaminated soil by chemical immobilization methods, but there is a lack of research on the simultaneous presence of multiple heavy metals.

Method used

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  • Heavy metal agricultural soil remediation method

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Effect test

Embodiment 1

[0041] A method for remediating heavy metal agricultural soil, the method comprising:

[0042] (1) preparing a soil remediation agent, the soil remediation agent is calculated according to parts by weight, including: 45 parts of biochar; 10 parts of bentonite; 8 parts of curing agent;

[0043] (2) mix the soil remediation agent with the soil polluted by heavy metals according to the weight ratio of 1:15, and obtain the contaminated soil containing the soil remediation agent;

[0044] (3) Spray water mist to the contaminated soil containing the soil remediation agent to make the water content reach 30% to 50%, and then leave it at room temperature for 6 days to obtain the improved soil;

[0045] Among them, the curing agent includes the first curing agent and the second curing agent; biochar is made of straw and / or manure as raw material, and after vacuum pyrolysis at 200-300°C for 1-2 hours, it is ground to a particle size of 2-200°C. 3mm particles.

[0046] The preparation ...

Embodiment 2

[0063] A method for remediating heavy metal agricultural soil, the method comprising:

[0064] (1) preparing a soil remediation agent, the soil remediation agent is calculated according to parts by weight, including: 35 parts of biochar; 8 parts of bentonite; 5 parts of curing agent;

[0065] (2) mix the soil remediation agent with the soil polluted by heavy metals according to the weight ratio of 1:10, and obtain the contaminated soil containing the soil remediation agent;

[0066] (3) Spray water mist to the polluted soil containing the soil remediation agent, so that the water content reaches 30% to 50%, and then leave it at room temperature for 5 days to obtain the improved soil;

[0067] Among them, the curing agent includes the first curing agent and the second curing agent; biochar is made of straw and / or manure as raw material, and after vacuum pyrolysis at 200-300°C for 1-2 hours, it is ground to a particle size of 2-200°C. 3mm particles.

[0068] The preparation me...

Embodiment 3

[0085] A method for remediating heavy metal agricultural soil, the method comprising:

[0086] (1) Prepare a soil remediation agent, the soil remediation agent is calculated according to parts by weight, including: 50 parts of biochar; 20 parts of bentonite; 10 parts of curing agent;

[0087] (2) mix the soil remediation agent with the soil polluted by heavy metals according to the weight ratio of 1:20, and obtain the contaminated soil containing the soil remediation agent;

[0088] (3) Spray water mist to the polluted soil containing the soil remediation agent, so that the water content reaches 30% to 50%, and then leave it at room temperature for 7 days to obtain the improved soil;

[0089] Among them, the curing agent includes the first curing agent and the second curing agent; biochar is made of straw and / or manure as raw material, and after vacuum pyrolysis at 200-300°C for 1-2 hours, it is ground to a particle size of 2-200°C. 3mm particles.

[0090] The preparation me...

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Abstract

The invention relates to the field of soil remediation, in particular to a heavy metal agricultural soil remediation method. The heavy metal agricultural soil remediation method disclosed by the invention is characterized by including: (1) preparing a soil remediation agent, which comprises the following components by weight: 35-50 parts of biochar; 8 to 20 parts of bentonite; and 5-10 parts of acuring agent; (2) mixing the soil remediation agent with heavy metal contaminated soil according to a weight ratio of 1:10-20 uniformly to obtain contaminated soil containing the soil remediation agent; and (3) spraying water mist to the contaminated soil containing the soil remediation agent to make the water content reach 30-50%, and then performing standing at room temperature for 5-7d to obtain improved soil. Directed at different heavy metals in soil, a method combining two curing agents is adopted for remediation, and the two curing agents supplement each other and act together, thus reaching an excellent soil remediation effect.

Description

technical field [0001] The invention relates to the field of soil restoration, in particular to a heavy metal agricultural soil restoration method. Background technique [0002] Soil heavy metal pollution is concealed, long-term and irreversible. Pollutants stay in the soil for a long time and cannot be degraded by plants or microorganisms. Heavy metal pollution not only leads to soil degradation, reduction of crop yield and quality, but also may be caused by direct contact, The food chain endangers human life and health. [0003] Soil pollution not only causes serious harm to the ecological environment and human health, but also hinders the development of my country's economy. The main types of soil pollution are heavy metals, mainly including chromium, cadmium, mercury, arsenic, lead, copper, zinc, nickel and so on. The distribution of heavy metal soil pollution is wide, the amount of pollution is large, and the cost of treatment is high, and the treatment cycle is long....

Claims

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Application Information

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IPC IPC(8): C09K17/40B01J20/24B01J20/30
CPCB01J20/12B01J20/20B01J20/22B01J20/24B01J2220/4868C09K17/40
Inventor 陈宽陈勇黄雪敏陈雷陈再红
Owner 宁波丰科源农业科技有限公司
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