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Method for degrading clopyralid in water by performing electron beam irradiation

A technology of clopyralid and electron beam irradiation, which is applied in the field of radiation chemical treatment and wastewater treatment, and can solve problems such as difficult degradation, non-decomposition, clopyralid ecological environment and human health threats

Inactive Publication Date: 2012-05-02
SHANGHAI UNIV
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  • Application Information

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Problems solved by technology

The use of clopyralid in soils with high permeability and shallow water layers may pollute groundwater. In addition, the use of this pesticide in areas around sewage pools and areas with obvious cracks on the surface may also pollute groundwater, and in wetlands The surrounding use will also seriously pollute the surface water

Method used

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  • Method for degrading clopyralid in water by performing electron beam irradiation
  • Method for degrading clopyralid in water by performing electron beam irradiation
  • Method for degrading clopyralid in water by performing electron beam irradiation

Examples

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Embodiment 1

[0021] Example 1: Dissolve the clopyralid acid powder in pure water after weighing, and prepare the concentration of clopyralid acid as 100mg / l, 200mg / l, 300mg / l, 400mg / l respectively. Pour the sample into a quartz test tube and place it under the irradiation window of the electron accelerator, wherein the distance between the liquid surface in the quartz test tube and the irradiation port is 30 cm, and the thickness of the liquid is 5 cm. Turn on the electron accelerator and prepare for irradiation. The concentration of the sample before and after irradiation was determined by high performance liquid chromatography, and its degradation rate was known. The energy of the electron accelerator used in this embodiment is 1.8 MeV, the current intensity is 1 mA, and the irradiation dose of the high-energy electron beam is 10-50 KGy. Add a small amount of KOH to the test sample solution to adjust its pH to 7-11; at the same time add 2-10mM H 2 o 2 , to facilitate its degradation...

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Abstract

The invention provides a method for degrading clopyralid in water by performing electron beam irradiation, which relates to an efficient energy-saving water treatment technology. In the method, high-energy electrons are produced by using an electron accelerator under the irradiation condition and are used for treating a water body containing clopyralid. The energy of the electron accelerator used in the method is 1.8 MeV, the current intensity is 1mA, and the electron irradiation dosage is 5-50 KGy. 2-10 mM of hydrogen peroxide is added into a sample solution of the used clopyralid, and the pH value of the solution is adjusted to 7-11, so that the degradation is promoted, and the radiation dosage can be reduced appropriately.

Description

Technical field [0001] The invention relates to a new technology for wastewater treatment - electron beam treatment technology, which belongs to the technical field of wastewater treatment and the technical field of radiation chemical treatment. Treat water containing clopyralid to degrade it. Background technique [0002] Clopyralid is a herbicide used to remove annual and perennial weeds. Its widespread use has resulted in large amounts of residues in the environment. Its presence can be detected in drinking water in some areas, posing a serious threat to human life and health. A serious threat, it can make people's respiratory system difficult and have a great impact on vision. [0003] The fate of clopyralid in the environment is: [0004] In soil: Clopyralid has average activity in soil, and its adsorption by soil is not strong. Most of the adsorption behavior in soil is completed by the roots of plants. This herbicide can last for a long time in soil in the abse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/30
Inventor 卜葶葶徐刚吴明红郑继三裘文慧王亮
Owner SHANGHAI UNIV
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