Method for degrading pyrethrins pesticide by magnetic polyurethane foam plastic immobilized cell

A technology of foamed plastics and pyrethroid pesticides, applied to chemical instruments and methods, fixed on/in organic carriers, fibrous fillers, etc., can solve the problem of large losses

Inactive Publication Date: 2008-03-19
许雷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the agricultural and sideline products exported by my country, the trade loss caused by pesticide residues exceeds tens of billions of dollars every year, which is a huge loss

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Magnetic polyurethane foam immobilized JCX22D cells to degrade permethrin pesticides in water

[0025] Beta-cypermethrin, cyhalothrin, deltamethrin, and bifenthrin are dissolved in acetone and added to sterile water at a ratio of 20 mg / l. Put the foam block of fixed JCX22D strain cells in the pesticide water body. Incubate at 30°C for 108 hours, extract the pyrethroid pesticide in the water sample with cyclohexane, and measure the pesticide residue by gas chromatography (Trace GC), and the detector is an electron capture device (ECD). Sterile water without pesticides was used as a control. The measurement results are shown in Table 1.

[0026] Table 1 Degradation rate of four pyrethroid pesticides in water by immobilized JCX22D strain (%)

[0027] permethrin

Embodiment 2

[0028] Example 2: Magnetic polyurethane foam immobilized JCX22D cells to degrade organophosphorus pesticides in water

[0029] Four organophosphorus pesticides, phoxim, methyl parathion, chlorpyrifos and diazinon, were dissolved in acetone, and added to sterile water at a ratio of 20 mg / l. Put the foam blocks that fix the JCX22D strain cells in the water body. Incubate at 30°C for 108 hours, extract pesticides in water samples with cyclohexane, and perform wavelength scanning with UV-VIS 8500 double-beam ultraviolet / visible spectrophotometer, and determine the degradation rate of pesticides by comparing the samples with the control. With sterile water without pesticides as a control, the results are shown in Table 2.

[0030] Table 2 Degradation rate of four organophosphorus pesticides in water by immobilized JCX22D strain (%)

[0031] organophosphate

Embodiment 3

[0032] Example 3: Magnetic polyurethane foam immobilized JCX22D cells degrade avermectin pesticides in water

[0033] Abamectin is dissolved in acetone, and the foam block for fixing JCX22D strain cells is put in the pesticide-containing water body according to the ratio of foam block to water body area ratio of 1:10. Incubate at 30°C for 108 hours, extract abamectin in water with trichlorohexane, and perform wavelength scanning with a UV-VIS 8500 double-beam ultraviolet / visible spectrophotometer, and determine the degradation rate of the pesticide by comparing the sample with the control. The soil samples without abamectin and sterile water were used as controls. The measurement results are shown in Table 3.

[0034] Table 3 Degradation rate (%) of immobilized JCx22D strain to avermectin pesticide in water

[0035] Control concentration (mg / L)

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PUM

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Abstract

The present invention belongs to a plant magnetism polyurethane foam plastic immobilized microorganism cell and the technology field of the biological degradation chemical pesticide, and relates to the magnetic immobilization to a strain cell which highly and effectively degrades the pyrethroid pesticide. The bacterial strain is acinetobacter (Acinetobacter sp.) JCX22D strain, which uses botanical wastes as polymerization material, and Fe 3 O 4 as a magnetic component, a cold curing technology is adopted to perform the immobilization of the strain cell, and the immobilized cell can be recycled through adding the magnetic field. The degradation efficiency of the immobilized cell to highly effective cypermethrin, lamba cyhalothrin and bifenthrin is more than 70 percent, the degradation efficiency to naled, methyl parathion, phoxim and chlorpyrifos is over 60 percent, and the degradation efficiency to avermectins is 85 percent. The magnetic immobilized cell can be used for the biolobical repair or biological purification of a water body polluted by the pesticide.

Description

technical field [0001] The invention belongs to the technical field of chemical pesticide biodegradation by magnetically immobilized microbial cells, and relates to the magnetic immobilization of microbial cells with high-efficiency degradation capabilities for pyrethrins, organophosphorus, and avizyme, which are used for high-efficiency cypermethrin, trifluoro Cypermethrin, deltamethrin, bifenthrin, diazinon, methyl parathion, phoxim, chlorpyrifos, and avermectin pesticides for bioremediation and biopurification of water bodies. Background technique [0002] Chemical insecticides are a class of toxic compounds used to control pests and play an important role in agricultural production. The output of pesticides and insecticides in my country accounts for 60% of the total output of pesticides in the country, and its main varieties are organophosphorus and pyrethroids. [0003] Pyrethroids and organophosphorus pesticides are widely used on vegetables, tea, and fruit trees in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N11/08A62D3/00C02F3/34C09C1/10
Inventor 许雷邱枫肖红莉张艳辉
Owner 许雷
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