Method of fast degradation of organic phosphorus pesticide

An organophosphorus pesticide, rapid degradation technology, applied in chemical instruments and methods, light water/sewage treatment, water/sewage treatment, etc. Achieve the effect of low cost, good treatment effect and low energy consumption

Inactive Publication Date: 2006-03-29
段晓军 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But as we know, the penetration ability of light to non-transparent substances is very low, generally only a few millimeters, using ultraviolet light combined with nano-semiconductor TiO 2 Catalysts are used to treat turbid or low-tra...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Using nano-titanium dioxide catalyst under the action of an ultrasonic generator, adding water-soluble peroxide additives, catalytically degrades organophosphorus pesticide M1605. As we all know, M1605 is a typical and common pesticide in agricultural production. Its large-scale and large-scale use has caused serious pesticide residues in vegetables, fruits, grains and other crops. Long, high toxicity, more serious harm to the human body, so it is imperative to study its degradation. The experiment found that: when the initial concentration of M1605 is 10-100mg / L, the amount of nano-titanium dioxide catalyst added is 50-500mg / L, the amount of water-soluble peroxide additive is 250-500mg / L, and the initial pH value is 5.00-7.50, The ultrasonic frequency is 20-160kHz, the power is ≤60W, and at 20-60°C, within 5-10min, the degradation rate reaches above 95-97%. If the initial concentration of M1605 is lower than 40mg / L, it will reach 100% within 2-12min.

Embodiment 2

[0012] Using nano-titanium dioxide catalyst under the action of ultrasonic generator, adding water-soluble peroxide additives, catalytic degradation of organophosphorus pesticide phorate 3911. As we all know, phorate 3911 is a common organophosphorus pesticide, mainly used to control soil pests and some nematodes. The pesticide is highly toxic, and it is not easy to degrade naturally, and it is not easy to be metabolized and excreted in the human body. The experiment found that: when the initial concentration of phorate 3911 is 10-50mg / L, the addition amount of nano-titanium dioxide catalyst is 50-250mg / L, the addition amount of water-soluble peroxide additive is 125-750mg / L, and the initial pH value is 7.00- 9.50, ultrasonic frequency 20-160kHz, power ≤60W, at 20-60°C, within 10-20min, the degradation rate can reach more than 92-95%. If the initial concentration of phorate 3911 is lower than 20mg / L, it will reach 100% within 3-15min.

Embodiment 3

[0014] The organic phosphorus pesticide malathion 4049 is catalytically degraded by using a nano-titanium dioxide catalyst under the action of an ultrasonic generator and adding a water-soluble peroxide additive. Malathion 4049 is an organophosphorus insecticide with high selective toxicity. It is mainly used to control pests on vegetables and fruit trees, and is also used to control mosquitoes and flies. Due to its large amount of spraying on vegetables and fruit trees, it causes pesticide residues on vegetables and fruits. Although the toxicity is not large, long-term accumulation in the human body will cause distortion in the human body and lead to pathological changes. Experiments have found that when the initial concentration of malathion 4049 is 50-100mg / L, the addition amount of nano-titanium dioxide catalyst is 40-100mg / L, the addition amount of water-soluble peroxide additive is 100-1000mg / L, and the initial pH value is 7.00-8.50, ultrasonic frequency 20-80kHz, power...

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Abstract

A method for quickly degradating the residual agricultural chemical containing organophosphorus in sewage or on vegetable or fruit includes such steps as preparing the aqueous solution from nano-TiO2 catalyst and water-soluble peroxide (potassium peroxide or sodium peroxide), and degradating under the action of ultrasonic wave.

Description

Technical field: [0001] The invention belongs to the improvement of the rapid degradation method of organophosphorus pesticides, and is mainly used for the purification of organic pollutant waste water such as organophosphorus pesticides and the removal of residual organophosphorus pesticides in vegetables and fruits. Background technique: [0002] Pesticides play a huge role in agricultural production. According to incomplete statistics, the use of pesticides in the world increases by 3.0-3.5×10 8 tons of grain. However, the extensive use of pesticides is very destructive to the ecological environment. Therefore, controlling pesticide pollution and protecting the ecological environment has become a hot issue in environmental protection. At present, organophosphorus pesticides are still the mainstream of pesticides used in my country. Vegetables, fruits, food, etc. pose a huge threat to human health due to pesticide residues. In terms of pesticide degradation, biochemic...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/32C02F1/72
Inventor 王君
Owner 段晓军
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