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Restoration method of soil polluted by cypermethrin

A technology of cypermethrin and polluted soil, applied in the restoration of polluted soil, etc., can solve the problems of secondary pollution and difficult degradation of cypermethrin, and achieve the effect of high applicability, remarkable effect and wide sources

Active Publication Date: 2014-06-18
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that cypermethrin remains difficult to degrade in the 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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  • Restoration method of soil polluted by cypermethrin
  • Restoration method of soil polluted by cypermethrin

Examples

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Effect test

Embodiment 1

[0032] Corn stalks from abundant sources are selected as raw materials. The leaves of the stalks are peeled off, washed with tap water and air-dried, and then dried overnight in an oven at 70-80°C after being initially cut into pieces. The dried corn stalks were crushed with a crusher, passed through a 20-mesh sieve, put into a 100mL porcelain crucible, and the lid was sealed with tinfoil to avoid contact with air as much as possible. Use a muffle furnace to heat anaerobically at 600°C for 1 hour, take it out after cooling to room temperature, and it will be biochar. See the attached biochar microstructure. figure 1 .

[0033] Weigh 7.5g of the prepared biochar and equal volume of cypermethrin-contaminated soil and mix to prepare the 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 , to obtain 1.5kg of soil mixture, that is, the mass fraction of biochar is 0.5%, and the m...

Embodiment 2

[0039] Corn stalks from abundant sources are selected as raw materials. The leaves of the stalks are peeled off, washed with tap water and air-dried, and then dried overnight in an oven at 70-80°C after being initially cut into pieces. The dried corn stalks were crushed with a crusher, passed through a 20-mesh sieve, put into a 100mL porcelain crucible, and the lid was sealed with tinfoil to avoid contact with air as much as possible. Use a muffle furnace to anaerobically heat at 600°C for 1 hour, and take it out after cooling to room temperature, which is biochar.

[0040]Weigh 1.5g of the prepared biochar and equal volume of cypermethrin-contaminated soil and mix to prepare the soil remediation agent, then weigh 1.485kg of fresh farmland soil, pass through a 20-mesh sieve, and mix the soil remediation agent with the farmland soil , to get 1.5kg of soil mixture, that is, the mass of biochar accounts for about 1%, and the mixed soil is placed in a flower pot. Cultivate in a ...

Embodiment 3

[0043] Corn stalks from abundant sources are selected as raw materials. The leaves of the stalks are peeled off, washed with tap water and air-dried, and then dried overnight in an oven at 70-80°C after being initially cut into pieces. The dried corn stalks were crushed with a crusher, passed through a 20-mesh sieve, put into a 100mL porcelain crucible, and the lid was sealed with tinfoil to avoid contact with air as much as possible. Use a muffle furnace to anaerobically heat at 600°C for 1 hour, and take it out after cooling to room temperature, which is biochar.

[0044] Weigh 30g of the prepared biochar and the same volume of cypermethrin-contaminated soil and mix to prepare a soil remediation agent, then weigh 1.47kg of fresh farmland soil, pass through a 20-mesh sieve, and mix the soil remediation agent with the farmland soil. 1.7 kg of soil mixture was obtained, that is, the mass fraction of biochar was 2%, and the mixed soil was placed in a flowerpot. Cultivate in a ...

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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] This method is the application technology field of soil ecological repair.Specifically involves a method of using biochams prepared by agricultural and forestry waste to promote the degradation of cyanoline in the soil. [0002] Background technique [0003] In recent years, the residual problems of high -toxic pesticides have received more and more attention, and countries around the world have also begun to adopt various measures such as highly restricting the production and use of high -toxic pesticides to cope.Organic chlorine, organic phosphorus, and amino -aminotropinate, artificially synthesized, good environmental compatibility, high biological activity, and high stability. In recent yearsEssenceHowever, with its extensive and large number of applications, and it is difficult to degrade under the relative stability of the environment and under natural conditions, its residual problems in the environment and its agricultural products are becoming inc...

Claims

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Application Information

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