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Remediation method for pesticide-contaminated soil

A pesticide-contaminated soil and pesticide-contaminated technology, applied in the field of environmental engineering, can solve the problems of high harm, slow degradation, persistent pollution, etc., and achieve the effect of changing soil properties and eliminating toxicity

Pending Publication Date: 2019-07-12
武夷学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic pesticides such as omethoate and lambda-cyhalothrin are widely used, and they degrade slowly in the environment, causing persistent pollution and great harm

Method used

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  • Remediation method for pesticide-contaminated soil
  • Remediation method for pesticide-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment relates to a kind of processing method of soil contaminated by pesticides, such as figure 1 As shown, it specifically includes the following steps:

[0023] S1. After crushing the pesticide-contaminated soil, sieve it to a particle size of 100 mesh to obtain secondary soil;

[0024] S2. According to the dosage of 0.8g per gram of secondary soil, add a catalase solution with a concentration of 60mg / L in the secondary soil, after the dispersion is uniform, shake at a constant temperature for 12h, adjust the pH value to 7, Get tertiary soil;

[0025] S3. After raising the temperature of the tertiary soil to 40° C., solid-liquid separation is carried out, the liquid part is collected to carry out the operations of steps S2-S3, and the solid part is backfilled.

[0026] The Omethoate pesticide residue concentration in the soil before the treatment of heavy metal pollution in this example was 13.1mg / kg, and the residual concentration of lambda-cyhalothrin wa...

Embodiment 2

[0028] This embodiment relates to a kind of processing method of soil contaminated by pesticides, such as figure 1 As shown, it specifically includes the following steps:

[0029] S1. After crushing the pesticide-contaminated soil, sieve it to a particle size of 100 mesh to obtain secondary soil;

[0030] S2. Add catalase solution with a concentration of 40-60 mg / L to the secondary soil according to the dosage of 0.8 g per gram of secondary soil. After uniform dispersion, shake at constant temperature for 12 hours, and adjust the pH value to 7. Get tertiary soil;

[0031] S3. After raising the temperature of the tertiary soil to 40° C., solid-liquid separation is carried out, the liquid part is collected to carry out the operations of steps S2-S3, and the solid part is backfilled.

[0032] The Omethoate pesticide residue concentration 15.2mg / kg in the soil before the soil treatment of this example heavy metal pollution, the degradation rate of Omethoate after the above-menti...

Embodiment 3

[0034] This embodiment relates to a kind of processing method of soil contaminated by pesticides, such as figure 1 As shown, it specifically includes the following steps:

[0035] S1. After crushing the pesticide-contaminated soil, sieve it to a particle size of 100 mesh to obtain secondary soil;

[0036] S2. According to the dosage of 0.8g per gram of secondary soil, add a catalase solution with a concentration of 60mg / L in the secondary soil, after the dispersion is uniform, shake at a constant temperature for 12h, adjust the pH value to 7, Get tertiary soil;

[0037] S3. After raising the temperature of the tertiary soil to 40° C., solid-liquid separation is carried out, the liquid part is collected to carry out the operations of steps S2-S3, and the solid part is backfilled.

[0038] The residual concentration of lambda-cyhalothrin in the heavy metal-polluted soil in this example before the treatment was 21.2 mg / kg, and the degradation rate of lambda-cyhalothrin was 75.2...

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Abstract

The invention provides a remediation method for pesticide-contaminated soil. The method comprises the following steps: step 1, crushing the pesticide-contaminated soil, and performing sieving to obtain secondary soil with a particle size of 80-100-mesh; step 2, adding a catalase solution into the secondary soil, performing uniform dispersion, performing shaking at a constant temperature, and adjusting the pH to 7 to obtain tertiary soil; and step 3, heating the tertiary soil to 30-40 DEG C, performing solid-liquid separation, collecting the liquid portion, performing operations in the step 2 and the step 3, and performing backfilling treatment on the solid portion. The method provided by the invention has the following beneficial effects: 1, the method overcomes the defects that chemical and physical methods have high treatment costs of the residual problem of organic pesticides, have secondary pollution to soil, change properties of the soil and have poor operability.

Description

technical field [0001] The invention relates to a treatment method for pesticide-contaminated soil, which belongs to the technical field of environmental engineering. Background technique [0002] Soil is one of the resources that people depend on for survival and an important part of the ecological environment. It is highly sensitive to environmental changes. The survey shows that there are many reasons for soil pollution and deterioration, such as the increasing use of chemical pesticides in agriculture, the discharge of industrial wastewater, the discharge of toxic and harmful substances, and landfills. Soil pollution includes heavy metal pollution, organic pollution, and inorganic pollution, among which heavy metal pollution and organic pollution are the most harmful and difficult to control. Contaminated soil causes secondary pollution to surface water and groundwater. Toxic pollutants enter the human body through the drinking water and soil-plant system through the fo...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/06B09C1/08
CPCB09C1/00B09C1/06B09C1/08
Inventor 林维晟林旸易林皓陈文通付兴平吴芳芳毛竹简
Owner 武夷学院
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