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Method for remedying pesticide-contaminated soil

A technology of pesticide contamination of soil and soil, applied in the field of soil remediation, can solve problems such as human health threats, soil and soil quality effects, etc.

Inactive Publication Date: 2018-08-24
句容宇发农业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbofuran and chlorpyrifos remain in the soil for a long time, which will not only affect the soil quality but also pose a threat to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for remediating pesticide-contaminated soil, comprising the steps of:

[0021] Step 1, spraying pretreatment agent in pesticide contaminated soil area, pretreatment agent is the mixed aqueous solution of surfactant, oxidant, buffer salt, the concentration of each component is: surfactant 20wt.%, oxidant 3wt.%, buffer salt 2wt.%;

[0022] Step 2, after the pretreatment agent completely infiltrates the soil, apply the soil remediation agent, which is prepared by mixing the microbial remediation agent and the active adsorbent at a weight ratio of 0.1:20 and grinding them;

[0023] Step 3, the soil of step 2 is sealed and stacked for 3-5d;

[0024] Step 4, spray the buffering agent into the soil in step 3, after the buffering agent completely soaks the soil, then spray water to adjust the soil humidity to 30-40%, and maintain for 1-2d;

[0025] Wherein, the surfactant is lauryl polyoxyethylene ether, the oxidizing agent is permanganate, and the buffer salt is sod...

Embodiment 2

[0030] A method for remediating pesticide-contaminated soil, comprising the steps of:

[0031] Step 1, spraying pretreatment agent in pesticide contaminated soil area, pretreatment agent is the mixed aqueous solution of surfactant, oxidant, buffer salt, the concentration of each component is: surfactant 23wt.%, oxidant 4wt.%, buffer salt 3wt.%;

[0032] Step 2, after the pretreatment agent completely infiltrates the soil, apply the soil remediation agent, which is prepared by mixing the microbial remediation agent and the active adsorbent at a weight ratio of 0.3:22 and grinding them;

[0033] Step 3, the soil of step 2 is sealed and stacked for 3-5d;

[0034] Step 4, spray the buffering agent into the soil in step 3, after the buffering agent completely soaks the soil, then spray water to adjust the soil humidity to 30-40%, and maintain for 1-2d;

[0035] Wherein, the surfactant is lauryl polyoxyethylene ether, the oxidizing agent is permanganate, and the buffer salt is sod...

Embodiment 3

[0040] A method for remediating pesticide-contaminated soil, comprising the steps of:

[0041] Step 1, spray pretreatment agent in pesticide contaminated soil area, pretreatment agent is the mixed aqueous solution of surfactant, oxidizing agent, buffer salt, the concentration of each component is: surfactant 26wt.%, oxidizing agent 5wt.%, buffer salt 4wt.%;

[0042] Step 2, after the pretreatment agent completely infiltrates the soil, apply the soil remediation agent, which is prepared by mixing the microbial remediation agent and the active adsorbent at a weight ratio of 0.4:25 and then grinding;

[0043] Step 3, the soil of step 2 is sealed and stacked for 3-5d;

[0044] Step 4, spray the buffering agent into the soil in step 3, after the buffering agent completely soaks the soil, then spray water to adjust the soil humidity to 30-40%, and maintain for 1-2d;

[0045] Wherein, the surfactant is lauryl polyoxyethylene ether, the oxidizing agent is permanganate, and the buffe...

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PUM

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Abstract

The invention discloses a method for remedying pesticide-contaminated soil. The method includes spraying pretreating agents in pesticide-contaminated soil regions; applying soil remedying agents intothe soil after the soil is completely wetted by the pretreating agents; hermetically piling the soil for 3-5 d; spraying buffer agents; spraying water to regulate the humidity of the soil after the soil is completely wetted by the buffer agents; carrying out maintenance for 1-2 d. The pretreating agents are mixed aqueous solution of surfactants, oxidizing agents and buffer salt, and the soil remedying agents are active adsorbents loaded with microbial remedying agents. The method has the advantages that the pretreating agents with the surfactants and the oxidizing agents are sprayed to to-be-treated soil surfaces at first, pesticides in the soil can enter liquid-phase oxidization environments in an accelerated manner and further can be degraded by the active adsorbents loaded with the microbial remedying agents, and accordingly the contaminated soil can be remedied.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for remediating pesticide-contaminated soil. Background technique [0002] With the rapid development of science and technology, the level of industrialization continues to increase, and the scope of human activities is expanding. Based on the expansion of agricultural needs and production activities, people demand more and more chemical pesticides. Most chemical pesticides contain several kinds of refractory organic substances. and is excreted into the environment through metabolic processes. Many refractory organic substances have caused secondary pollution to the environment, posing a great threat to the living space of animals and plants. The harm of pesticides to organisms has three aspects: direct killing, chronic harm, and destruction of ecological balance. Studies have shown that soil polluted by pesticides for a long time is prone to soi...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/10
Inventor 李友发
Owner 句容宇发农业发展有限公司
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