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Restoring method for soil contaminated by organophosphorus, organochlorine and pyrethroid pesticides

A technology for pyrethroid and pesticide-contaminated soil, which can be used in the field of organophosphorus, pyrethroid-polluted soil remediation, and in the field of organochlorine, and can solve problems such as secondary pollution and insufficient removal of pollutants.

Inactive Publication Date: 2017-01-04
余敏敏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the remediation of pesticide-contaminated soil is mainly based on physical remediation and biological remediation. The biggest disadvantage of physical remediation technology is that the removal of pollutants is not thorough enough, which leads to secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Plow the polluted land shallowly to 18cm;

[0016] Crush the wheat straw, the length of the crushed fragment is 1cm, put it in a microwave drying and carbonization equipment, at 130°C, after 60 minutes of treatment, spray clarified lime water with a concentration of 2% to keep the humidity of the wheat straw at 60%, and place it again In microwave drying and carbonization equipment, at 260°C, activate for 100 minutes;

[0017] Crush the activated wheat straw to 30 meshes, mix it with sucrose, bean dregs, and vitamin B in a weight ratio of 50:0.1:10:0.02, add water to adjust the humidity to 65%, and inoculate radioactive Agrobacterium LQC-99 with an inoculation amount of 2%, fermented at 30°C for 3 hours;

[0018] Apply the fermented product to the polluted land at a rate of 30kg per mu, mix evenly, and the mixing depth is 10cm, apply water evenly after mixing, keep the soil humidity at 55%, cover the soil surface with straw, and after 8 days , the restoration is compl...

Embodiment 2

[0022] Plow the polluted land shallowly by 19cm;

[0023] Crush the wheat straw, the length of the crushed fragment is 1.5cm, put it in a microwave drying and carbonization equipment, and after 65 minutes of treatment at 132°C, spray clarified lime water with a concentration of 2% to keep the humidity of the wheat straw at 60%, and again Place in microwave drying and carbonization equipment, and activate for 102 minutes at 270°C;

[0024] Crush the activated wheat straw to 40 meshes, mix it with sucrose, bean dregs, and vitamin B in a weight ratio of 650:0.1:10:0.02, add water to adjust the humidity to 67%, and inoculate radioactive Agrobacterium LQC-99 with an inoculation amount of 2.5%, fermented at 30°C for 4 hours;

[0025] Apply the fermented product to the polluted land at a ratio of 40kg per mu, mix evenly, and the mixing depth is 13cm, apply water evenly after mixing, keep the soil humidity at 57%, cover the soil surface with straw, and after 9 days , remove the stra...

Embodiment 3

[0029] Plow the polluted land shallowly by 20cm;

[0030] Crush the wheat straw, the length of the crushed fragment is 2cm, put it in a microwave drying and carbonization equipment, and after 70 minutes of treatment at 135°C, spray clarified lime water with a concentration of 2% to keep the humidity of the wheat straw at 60%, and place it again In the microwave drying and carbonization equipment, at 280°C, activate for 105 minutes;

[0031] Crush the activated wheat straw to 30-50 mesh, mix it with sucrose, bean dregs, and vitamin B in a weight ratio of 80:0.1:10:0.02, add water to adjust the humidity to 65-68%, and inoculate the radioactive Agrobacterium LQC-99 , the inoculum size was 3%, and fermented at 30°C for 5 hours;

[0032] Apply the fermented product to the polluted land at a rate of 50kg per mu, mix evenly, and the mixing depth is 15cm, apply water evenly after mixing, keep the soil humidity at 58%, cover the soil surface with straw, and after 10 days , remove the...

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Abstract

The invention relates to the technical field of crop straw application, in particular to a restoring method for soil contaminated by organophosphorus, organochlorine and pyrethroid pesticides. After a contaminated block is shallowly ploughed, wheat straw obtained by fermentation with inoculated radioactive soil bacillus LQC-99 is applied, the fermented products are applied to the contaminated block according to a proportion of 30-50kg per mu for even blending, the soil surface is covered with straw, restoring is completed in 8-10 days, and the straw covering the soil surface is removed. The restoring cost is low, the restoring method is simple, the restoring time is short, the degradation rate of the organophosphorus, organochlorine and pyrethroid pesticides is above 91.33%, and no secondary contamination is generated by restoring.

Description

technical field [0001] The invention relates to the technical field of crop straw application, in particular to a repair method for soil polluted by organophosphorus, organochlorine and pyrethroid pesticides. Background technique [0002] In the current soil pollution, organophosphorus, organochlorine, and pyrethroid pesticides are one of the main elements causing soil pollution. [0003] Among them, organophosphorus pesticides play an important role in pesticides and are the most produced and used pesticides in the world. [0004] As some highly toxic organophosphorus pesticides have been banned, pyrethroid pesticides have gradually become the most important substitutes for organophosphorus pesticides, and the frequency of use has gradually increased. [0005] Although organochlorine pesticides have been banned for nearly 20 years, they can still be detected in soil, and their bioaccumulation has reached a very high level. [0006] At present, the remediation of pestici...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/10B09C2101/00
Inventor 余敏敏
Owner 余敏敏
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