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A kind of remediation method of cypermethrin polluted soil

A technology of cypermethrin and polluted soil, which is applied in the restoration of polluted soil, etc. It can solve the problems of secondary pollution and difficult degradation of cypermethrin, and achieve the effect of high applicability, remarkable effect and simple operation process

Active Publication Date: 2015-08-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that cypermethrin remains difficult to degrade in farmland soil for a long time, and proposes a technical scheme of preparing biochar by using agricultural and forestry waste and biotransformation products, and then using biochar to remediate cypermethrin-contaminated soil, which not only solves the problem of It solves the problem of secondary pollution caused by traditional physical and chemical methods, as well as the survival rate and ecological problems faced by microbial degradation, and also conforms to the sustainable development concept of "take from the field and use in the field"

Method used

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  • A kind of remediation method of cypermethrin polluted soil
  • A kind of remediation method of cypermethrin polluted soil

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Select corn stalks from abundant sources as raw materials. The stalks and leaves are peeled off, washed with tap water and air-dried, initially cut and dried in an oven at 70-80°C overnight. The dried corn stalks are crushed with a crusher and passed through a 20-mesh sieve, placed in a 100mL porcelain crucible, and sealed with tin foil to avoid contact with air. Use a muffle furnace to heat anaerobically at 600°C for 1 hour, cool to room temperature and take it out. It is biochar. The microstructure of biochar is attached. figure 1 .

[0032] Weigh 7.5g of the biochar prepared and mix an equal volume of cypermethrin-free contaminated soil to prepare a soil remediation agent, then weigh 1.49kg of fresh farmland soil, pass through a 20-mesh sieve, and mix the soil remediation agent with the farmland soil. , Get 1.5kg soil mixture, that is, the mass fraction of biochar is 0.5%, put the mixed soil in the flowerpot. Cultivate in a greenhouse at 25°C, turn the soil and add wa...

Embodiment 2

[0038] Select corn stalks from abundant sources as raw materials. The stalks and leaves are peeled off, washed with tap water and air-dried, initially cut and dried in an oven at 70-80°C overnight. The dried corn stalks are crushed with a crusher and passed through a 20-mesh sieve, placed in a 100mL porcelain crucible, and sealed with tin foil to avoid contact with air. Use a muffle furnace to heat anaerobically at 600°C for 1 hour, cool to room temperature and take it out, that is, biochar.

[0039] Weigh 1.5g of the prepared biochar and an equal volume of cypermethrin-free contaminated soil to prepare a soil remediation agent, then weigh 1.485 kg of fresh farmland soil, pass through a 20-mesh sieve, and mix the soil remediation agent with the farmland soil. , Get 1.5kg soil mixture, that is, the mass of biochar accounts for about 1%, put the mixed soil in the flower pot. Cultivate in a greenhouse at 25°C, turn the soil and add water 2 to 3 times a week. Regularly collect 10g...

Embodiment 3

[0042] Select corn stalks from abundant sources as raw materials. The stalks and leaves are peeled off, washed with tap water and air-dried, initially cut and dried in an oven at 70-80°C overnight. The dried corn stalks are crushed with a crusher and passed through a 20-mesh sieve, placed in a 100mL porcelain crucible, and sealed with tin foil to avoid contact with air. Use a muffle furnace to heat anaerobically at 600°C for 1 hour, cool to room temperature and take it out, that is, biochar.

[0043] Weigh 30g of the prepared biochar and an equal volume of cypermethrin-free contaminated soil to prepare a soil remediation agent, then weigh 1.47 kg of fresh farmland soil, pass through a 20-mesh sieve, and mix the soil remediation agent with farmland soil. Get 1.7 kg of soil mixture, that is, the mass fraction of biochar is 2%, and place the mixed soil in a flower pot. Cultivate in a greenhouse at 25°C, turn the soil and add water 2 to 3 times a week. Regularly collect 10g fresh ...

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Abstract

The invention provides a restoration method of soil polluted by cypermethrin and belongs to the field of application of ecological restoration. The restoration method utilizes corn straws as main materials, uses a muffle furnace to pyrolyze and prepare a soil restoration agent, i.e., biological carbon, then applies the soil restoration agent into the soil polluted by the cypermethrin according to certain proportion to restore the soil. The restoration method mainly comprises the steps of: (1) collecting the materials and preparing the soil restoration agent; (2) applying the soil restoration agent into the soil polluted by the cypermethrin according to certain proportion; (3) detecting and controlling the degradation condition of the substance polluted by the cypermethrin. The restoration method provided by the invention has the advantages that the process is simple, the cost is low, and the application range and conditions are wide; the materials of the biological carbon are agricultural and forestry wastes and bioconversion wastes and are wide in resource, and due to the application of the biological carbon, the soil polluted by the cypermethrin can be effectively restored.

Description

technical field [0001] The method belongs to the applied technical field of soil ecological restoration. Specifically, it relates to a method for promoting the degradation of cypermethrin in soil by using biochar prepared from agricultural and forestry waste. Background technique [0002] In recent years, the problem of highly toxic pesticide residues has received more and more attention, and countries around the world have also begun to take various measures to deal with it, such as strictly restricting the production and use of highly toxic pesticides. Therefore, cypermethrine (CP) is the A large class of pesticides that are artificially synthesized after organochlorine, organophosphorus and carbamate, have good environmental compatibility, high biological activity and high stability. In recent years, they have replaced organophosphorus pesticides and organochlorine pesticides as the main type of pesticides . However, with its wide and large application, and because it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
Inventor 王莹莹丁艳丽刘杰
Owner NANKAI UNIV
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