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A method for degrading acephate in solution by electron beam irradiation

A technology of acephate and electron beam irradiation, applied in chemical instruments and methods, neutralized water/sewage treatment, light water/sewage treatment, etc., can solve the problems of high treatment cost, low degradation efficiency, and no , to achieve the effect of high technical application value, strong operational safety and good irradiation uniformity

Active Publication Date: 2021-12-28
河南省科学院同位素研究所有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Physical methods such as activated carbon adsorption, macroporous resin adsorption, and ultrasonic waves have low degradation efficiency and are difficult to achieve industrialization; although chemical methods have strong degradation effects, they have high processing costs and are prone to secondary pollution; biological degradation is not complete, and its safety cannot be guaranteed
Therefore, various degradation methods do not have ideal selectivity and have relatively large limitations, which limit the application in the treatment of acephate pollutants.

Method used

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  • A method for degrading acephate in solution by electron beam irradiation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a) NaHCO 3 / H 2 CO 3 The buffer solution standard solution is added to the aqueous solution containing acephate, and the pH value of the solution is adjusted at 8;

[0027] b) the solution prepared in step a) is placed in a polyethylene composite packaging bag and filled with N 2 To the saturation state for packaging;

[0028] c) using an electron beam produced by an electron accelerator with an energy of 5-10 MeV, a beam current of 0.3-20 mA, and a beam power of 10-20 kW to irradiate the polyethylene composite packaging bag after step b) packaging, and control the temperature of the solution at 40 ℃, after irradiating a dose of 4.5kGy, open the package and fill it with O 2 , empty N 2 , making the solution O 2 Reach the saturated state, and then irradiate 4.5kGy at 30°C to make the total irradiation dose reach 9kGy;

[0029] d) During the operation of step c), the working temperature of the electron accelerator is set within the range of 5-35°C, the ambient humi...

Embodiment 2

[0031] a) K 2 HPO 4 / KH 2 PO 4 The pH buffer solution standard solution is added to the aqueous solution containing acephate, and the pH value of the solution is adjusted at 7;

[0032] b) the solution prepared in step a) is placed in a polyethylene composite packaging bag and filled with N 2 To the saturation state for packaging;

[0033] c) using energy of 5-10 MeV, beam current of 0.3-20mA, and beam power of 10-20kW electron beams produced by an electron accelerator to irradiate the polyethylene composite packaging bag after step b) packaging, and controlling the temperature of the solution at 50 ℃, after irradiating a dose of 2.5kGy, open the package and fill it with O 2 , empty N 2 , and then irradiate another 2.5kGy at 40°C to make the total irradiation dose reach 5kGy;

[0034] d) During the operation of step c), the working temperature of the electron accelerator is set within the range of 5-35°C, the ambient humidity is limited to no more than 60%, and the thic...

Embodiment 3

[0036] a) KHCO 3 / H 2 CO 3 The buffer solution standard solution is added to the aqueous solution containing acephate, and the pH value of the solution is adjusted at 7.5;

[0037] b) the solution prepared in step a) is placed in a polyethylene composite packaging bag and filled with N 2 To the saturation state for packaging;

[0038] c) using an electron beam produced by an electron accelerator with an energy of 5-10 MeV, a beam current of 0.3-20 mA, and a beam power of 10-20 kW to irradiate the polyethylene composite packaging bag after step b) packaging, and control the temperature of the solution at 30 ℃, after irradiating a dose of 1.5kGy, open the package and fill it with O 2 , empty N 2, and then irradiate another 1.5kGy at 20°C to make the total irradiation dose reach 3kGy;

[0039] d) During the operation of step c), the working temperature of the electron accelerator is set within the range of 5-35°C, the ambient humidity is limited to no more than 60%, and the...

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Abstract

The invention discloses a method for degrading acephate in a solution by electron beam irradiation. In the above-mentioned technical scheme disclosed by the invention, the method for degrading acephate in the prior art is improved simply by a single technology. Radiation degradation technology, pH adjustment, temperature control and different gas atmosphere synergistically enhance the degradation effect of acephate in the solution, and optimize the process parameters in the three treatment technologies, that is, by adjusting the pH value of the solution, the treatment The optimization of temperature, processing gas atmosphere, electron accelerator energy, beam current, beam power, irradiation dose and other process parameters significantly improved the degradation efficiency and depth of acephate in solution.

Description

technical field [0001] The invention belongs to the application field of civil nuclear technology, and also belongs to the technical field of chemical pollutant degradation. The invention relates to a degradation technology for acephate in solution, in particular to a treatment technology for degrading acephate by electron beam irradiation. Background technique [0002] Acephate is a broad-spectrum organophosphorus insecticide with high efficiency and low toxicity. Its toxic effect is mainly to inhibit the activity of acetylcholinesterase in the body and cause neurophysiological dysfunction. Its efficacy is equivalent to that of methamidophos, and it is a highly toxic pesticide. Ideal substitute for methamidophos banned. Acephate is widely used to control various chewing and sucking mouthparts pests on vegetables, tea trees, fruit trees, cotton, rice, wheat, rapeseed and other crops. Because only 1% of the acephate used in large quantities acts on the target, 30% stays on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F9/02C02F101/34C02F101/38
CPCC02F1/30C02F1/66C02F2209/02C02F2101/38C02F2101/34
Inventor 崔龙范家霖郭东权陈云堂吕晓华王娴董威杰许勃杨保安张建伟陈晓杰张福彦刘伟陈海军程仲杰张晓娜
Owner 河南省科学院同位素研究所有限责任公司
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