A kind of remediation method of organophosphorus pesticide polluted soil

An organophosphorus pesticide and soil-contaminated technology, applied in the field of pesticide-contaminated soil remediation, can solve the problems of instability, lack of organic combination of process technology, lack of targeted combination technology, etc., to avoid secondary pollution and enhance disease resistance. Ability, the effect of restoring soil vitality

Active Publication Date: 2020-06-05
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, ① chemical oxidation repair treatment is carried out by directly adding drugs, lacking targeted joint technology, resulting in unsatisfactory and unstable repair effects; The organic combination of process technology does not realize the comprehensive utilization of energy; ④It is often accompanied by a large amount of organic wastewater or waste gas, which needs to increase the cost of waste water or waste gas treatment

Method used

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  • A kind of remediation method of organophosphorus pesticide polluted soil

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Experimental program
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Effect test

Embodiment 1

[0031] A method for remediating soil polluted by organophosphorus pesticides, comprising the steps of:

[0032] 1. Electrolytic separation: Take 5 kg of soil polluted by organophosphorus pesticides (concentration: 3874 mg / Kg) in a pesticide factory after screening, submerge and soak for 1 hour with ethanol-water mixture containing 10% ethanol volume fraction, and add magnetotactic bacteria , placed in an external electric field, electrolytic treatment for 5h;

[0033] The positive electrode material of the applied electric field is a graphene plate, and the negative electrode material is an iron plate. Before the electrolysis reaction, the iron plate is cleaned with 0.5mol / L hydrochloric acid, and after activation, it is washed with clear water until neutral;

[0034] The intensity of the electric field is 60V, and the current is 1A;

[0035] The inoculation ratio of the magnetotactic bacteria is 5.0×10 per square meter of organophosphorus-contaminated soil. 9 a magnetotacti...

Embodiment 2

[0046] A method for remediating soil polluted by organophosphorus pesticides, comprising the steps of:

[0047] 1. Electrolytic separation: Take 5 kg of soil polluted by organophosphorus pesticides (concentration: 3874 mg / Kg) in a pesticide factory after screening, submerge and soak for 3 hours with ethanol-water mixture containing 10% ethanol volume fraction, add magnetotactic bacteria , placed in an external electric field, electrolytic treatment for 10h;

[0048] The positive electrode material of the applied electric field is a graphene plate, and the negative electrode material is an iron plate. Before the electrolysis reaction, the iron plate is cleaned with 0.5mol / L hydrochloric acid, and after activation, it is washed with clear water until neutral;

[0049] The intensity of the electric field is 100V, and the current is 2A.

[0050] The inoculation ratio of the magnetotactic bacteria is 2.0×10 per square meter of organophosphorus-contaminated soil. 10 a magnetotacti...

Embodiment 3

[0061] A method for remediating soil polluted by organophosphorus pesticides, comprising the steps of:

[0062] 1. Electrolytic separation: take 5 kg of soil polluted by organophosphorus pesticides (concentration: 3874 mg / Kg) in a pesticide factory after screening, submerge and soak for 2 hours with ethanol-water mixture containing 10% ethanol volume fraction, add magnetotactic bacteria , placed in an external electric field, and electrolyzed for 7 hours;

[0063] The positive electrode material of the applied electric field is a graphene plate, and the negative electrode material is an iron plate. Before the electrolysis reaction, the iron plate is cleaned with 0.5mol / L hydrochloric acid, and after activation, it is washed with clear water until neutral;

[0064] The strength of the electric field is 80V, and the current is 1.5A;

[0065] The inoculation ratio of the magnetotactic bacteria is to inoculate 1.0×10 per square meter of organic phosphorus-contaminated soil. 10 a...

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Abstract

The invention discloses a repair method for soil contaminated by organophosphorus pesticide. The repair method comprises the following steps that firstly, electrolytic separation is conducted; secondly, cooling and heating is alternated; thirdly, microbial fertilizers are added to promote invalid phosphorus to be converted into effective phosphorus; fourthly, scindapsus aureus is planted; fifthly,soil moisture preservation of frozen soil is conducted, and the treated soil is moved back to the original place. Organophosphorus in the soil repaired through the repair method is reduced significantly and meets the evaluation standard (temporary) HJ350-2007 of the soil environmental quality of exhibition land, soil activation is enhanced, and meanwhile, the effect of increasing both productionand incomes is achieved.

Description

technical field [0001] The invention relates to a method for repairing soil polluted by pesticides, in particular to a method for repairing soil polluted by organophosphorus pesticides. Background technique [0002] Organophosphorus pesticides are a class of organic ester compounds containing phosphorus atoms, which form phosphorylated cholinesterase with cholinesterase in the body, which inhibits the activity of cholinesterase and produces toxic effects. Some organophosphorus pesticides are insoluble in water (except dimethoate and trichlorfon), easily soluble in organic solvents, stable under neutral and acidic conditions, and easily hydrolyzed and invalidated under alkaline conditions. Their varieties have many commonalities in structure, and there are mainly five structural types: phosphate ester type (such as dichlorvos, monocrotophos); thio- and dithiophosphoroester-type (such as parathion, dimethoate); phosphoramide and Thiophosphoramide type (such as methamidophos, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10B09C1/06B09C1/08
CPCB09C1/00B09C1/06B09C1/085B09C1/105
Inventor 梁丽珍王杰李庆召郑宾国陶贺
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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