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Remediation method for polluted soil

A technology of polluted soil and remediation method, which is applied in the field of environmental protection to achieve the effects of low kinetic energy consumption, compact process flow and good treatment effect

Inactive Publication Date: 2019-04-16
王忠良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for remediating contaminated soil with good running continuity, good operability and excellent treatment effect on the basis of overcoming the above-mentioned technical defects of the patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for remediating contaminated acidic soil, comprising the following steps:

[0033] (1) Pulverization: first use a hammer mill to pulverize the contaminated acidic soil to 40 mesh;

[0034] (2) Screening: Sieve the crushed acidic soil through a 40-mesh sieve with a drum to remove impurities;

[0035] (3) Spraying: Spray the above step 2) into the acidic soil soil, add 0.05% liquid medicine, mix and stir for 20 minutes, then let it stand for 2 hours;

[0036] (4) Sterilization: Mix and heat the acidic soil in the above step 3) with a rotary steamer to 90°C, steam pressure 0.30MPa, and sterilize for 60 minutes;

[0037] (5) Put the pot: Put the soil in the above step 4) to cool to room temperature and put it in the pot;

[0038] (6) Adding organic matter: Add 0.5% tung tree to the soil in the above step 5) and mix evenly to repair the soil.

[0039] The acidic soil pH value described in this example is 5.5.

[0040] The medicinal liquid described in this embod...

Embodiment 2

[0045] A contaminated soil remediation method, comprising the following steps:

[0046] (1) Pulverization: first use a hammer mill to pulverize the contaminated soil to 60 mesh;

[0047] (2) Sieving: use a drum to sieve the crushed soil through a 60-mesh sieve to remove impurities;

[0048](3) Spraying: Spray the above step 2) into the soil and add 0.2% liquid medicine, mix and stir for 30 minutes, then let it stand for 4 hours;

[0049] (4) Sterilization: Mix and heat the soil in the above step 3) to 110°C with a steam pressure of 0.50MPa, and sterilize for 30 minutes;

[0050] (5) Put the pot: Put the soil in the above step 4) to cool to room temperature and put it in the pot;

[0051] (6) Adding organic matter: Add 2.0% Tung Kut to the soil in the above step 5) and mix evenly to repair the soil.

[0052] The pH value of the alkaline soil described in this example is 8.5.

[0053] The liquid medicine described in this embodiment is a mixture of a metal ion chelating agen...

Embodiment 3

[0058] A contaminated soil remediation method, comprising the following steps:

[0059] (1) Pulverization: first use a hammer mill to pulverize the contaminated soil to 50 mesh;

[0060] (2) Sieving: use a drum to sieve the crushed soil through a 50-mesh sieve to remove impurities;

[0061] (3) Spraying: Add 0.15% liquid medicine to the soil in step 2) above, mix and stir for 25 minutes, then let stand for 3 hours;

[0062] (4) Sterilization: Mix and heat the soil in the above step 3) to 100°C with a steam pressure of 0.40MPa, and sterilize for 40 minutes;

[0063] (5) Put the pot: Put the soil in the above step 4) to cool to room temperature and put it in the pot;

[0064] (6) Adding organic matter: add 1.5% tung tree to the soil in the above step 5) and mix evenly to repair the soil.

[0065] The acidic soil pH value described in this example is 5.0.

[0066] The liquid medicine described in this embodiment is a mixture of a metal ion chelating agent and an alkali soluti...

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Abstract

The invention discloses a remediation method for polluted soil. The remediation method comprises the following main steps of crushing, screening, spraying, heating sterilization and the like to remediate the polluted soil. Compared with a traditional remediation method for soil pollution, the remediation method for the polluted soil has the advantages that a treatment process is improved, and dustreduction and medicament addition in a soil treatment process are achieved through spraying; medicinal steam and pressure which are generated during heating sterilization are utilized to realize soilsterilization; by adding medicinal liquid and mixing the liquid uniformly, metal ion chelation and acid-base pH balance in the polluted soil are realized. The adopted treatment approaches of the method are hardly influenced by pollutant types and environmental conditions and have a wide application field. The method has the advantages of good effect, high operability and good social and environmental benefits.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a contaminated soil repair method. Background technique [0002] With the development of industrial production and the acceleration of urbanization, the soil bears more and more waste water, waste residue and waste gas from factories and human activities. If these wastes are not treated in a timely and effective manner, they will infiltrate into the soil along with the rainwater. When these pollutants accumulate to a level that exceeds the self-purification capacity of the soil, it will cause serious deterioration of the soil quality and form soil pollution. The main cause of soil pollution in cultivated land is the excessive use of pesticides, fertilizers and other chemicals in the agricultural production process. According to the announcement on my country's first soil pollution survey issued by the Ministry of Environmental Protection and the Ministry of Land and Resou...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/06
CPCB09C1/06B09C1/08
Inventor 王忠良
Owner 王忠良
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