Repair method for soil contaminated by organophosphorus pesticide

A technology for organophosphorus pesticides and polluted soil, applied in the field of pesticide-contaminated soil remediation, can solve problems such as instability, lack of organic combination of process technology, lack of targeted joint technology, etc., to avoid secondary pollution and enhance disease resistance Ability to restore soil vitality

Active Publication Date: 2018-12-28
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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  • Repair method for soil contaminated by organophosphorus pesticide

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A method for remediating soil contaminated by organophosphorus pesticides includes the following steps:

[0032] 1. Electrolytic separation: Take 5kg of soil contaminated by organophosphorus pesticides (concentration of 3874mg / Kg) from a pesticide factory after sieving, and submerge it for 1h with ethanol-water mixture containing 10% ethanol, 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. The iron plate is washed with 0.5 mol / L hydrochloric acid before the electrolysis reaction, and after activation, it is washed with clean water to 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 organic phosphorus contaminated soil 9 Magnetotactic bacteria;

[0036] 2. Alt...

Embodiment 2

[0046] A method for remediating soil contaminated by organophosphorus pesticides includes the following steps:

[0047] 1. Electrolytic separation: Take 5kg of soil contaminated by organophosphorus pesticides (concentration of 3874mg / Kg) from a pesticide factory after sieving, and submerge it for 3h with a mixture of ethanol and water containing 10% ethanol, and 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. The iron plate is washed with 0.5 mol / L hydrochloric acid before the electrolysis reaction, and after activation, it is washed with clean water to 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 organic phosphorus contaminated soil 10 Magnetotactic bacteria;

[...

Embodiment 3

[0061] A method for remediating soil contaminated by organophosphorus pesticides includes the following steps:

[0062] 1. Electrolytic separation: Take 5kg of soil contaminated by organophosphorus pesticides (concentration of 3874mg / Kg) from a pesticide factory after sieving, and submerge it for 2h with a mixture of ethanol and water containing 10% ethanol, and add magnetotactic bacteria , Placed in an external electric field, electrolytic treatment for 7h;

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

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

[0065] The inoculation ratio of the magnetotactic bacteria is 1.0×10 per square meter of organic phosphorus contaminated soil 10 Magnetotactic bacteria;

[...

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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 contaminated by pesticides, in particular to a method for repairing soil contaminated by organic phosphorus pesticides. Background technique [0002] Organophosphorus pesticides are a class of organic ester compounds containing phosphorus atoms that form phosphorylated cholinesterase with cholinesterase in the body, which inhibits cholinesterase activity and produces toxic effects. Some organophosphorus pesticides are insoluble in water (except dimethoate and trichlorfon), and are easily soluble in organic solvents. They are stable under neutral and acidic conditions, and are easily hydrolyzed and become invalid under alkaline conditions. Its varieties have many commonalities in structure, and there are mainly five structural types: phosphate type (such as dichlorvos, monocrotophos); thio and dithiophosphate type (such as parathion, dimethoate); phosphoramide and Phosphoramidite type (such as methamidoph...

Claims

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Application Information

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Patent Type & Authority Applications(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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