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Method for treating chlorothalonil in water by utilizing oligomeric proantho cyanidins extracted from natural plants

A technology of proanthocyanidins and natural plants, which is applied to the treatment of organic pollutants in water, chlorothalonil. Natural plant extracts of proanthocyanidins are used as chlorothalonil treatment agents in water bodies, which can solve the problems of inability to finally degrade chlorothalonil parent and high toxicity.

Active Publication Date: 2015-07-22
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other treatment techniques include activated carbon adsorption and coagulation methods, which cannot finally degrade the chlorothalonil parent
Ordinary photodegradation also produces highly toxic TPN-OH

Method used

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  • Method for treating chlorothalonil in water by utilizing oligomeric proantho cyanidins extracted from natural plants
  • Method for treating chlorothalonil in water by utilizing oligomeric proantho cyanidins extracted from natural plants
  • Method for treating chlorothalonil in water by utilizing oligomeric proantho cyanidins extracted from natural plants

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Treatment of chlorothalonil in distilled water by proanthocyanidins under high pressure mercury lamp

[0027] 1. Use acetonitrile to make chlorothalonil standard solution with a concentration of 500.0 mg / L, and use methanol to make chlorothalonil standard solution with a concentration of 1000.0 mg / L, 2500 mg / L, and 5000.0 mg / L. Three kinds of proanthocyanidin standard solutions. Add 10.0 uL of chlorothalonil standard solution to four groups of quartz glass tubes, each group consists of three tubes; add 100.0 uL of proanthocyanidin standard solution with a concentration of 1000.0mg / L to the first group; 100.0 uL of proanthocyanidin standard solution with a concentration of 2500.0 mg / L; 100.0 uL of proanthocyanidin standard solution with a concentration of 5000.0 mg / L were added to the third group; the fourth group was a blank control group; Set the volume of the reaction system to 10mL to obtain three groups of light treatment solutions with the concentration ratios of ...

Embodiment 2

[0033] Treatment of chlorothalonil in natural water by proanthocyanidins under natural light irradiation

[0034] Three kinds of natural water from reservoirs, ponds and paddy fields in Hefei area were taken as the photolysis medium for the photolysis treatment unit for treating chlorothalonil in the water. Take 1L of the three kinds of natural water respectively in three glass beakers, and add 0.0005g chlorothalonil respectively Clear the standard product so that the concentration of chlorothalonil reaches 0.5 mg / L, and then add 10 mg proanthocyanidins respectively to make the concentration of proanthocyanidins reach 10 mg / L. The light source is sunlight (location: 31 degrees 52 minutes north latitude, 117 degrees 17 minutes east longitude), the light intensity is 84000lx-93000lx, and the outdoor temperature is 34°C when the light is on; See the effect of bacteria clear (0.5mg / L) figure 2 as shown, figure 2The middle ordinate is the concentration of chlorothalonil in water,...

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Abstract

The invention relates to a method for treating chlorothalonil in water by utilizing oligomeric proantho cyanidins (OPC) extracted from natural plants. Under a condition that the light intensity is 84,000-93,000 lx, chlorothalonil is dissolved into an aqueous solution or directly put into a to-be-treated water body, the addition amount of chlorothalonil is 10-50 mg / L, the illumination time is controlled to be 10-20 minutes, wastewater treatment is performed, the removal rate of chlorothalonil is 32-70%, and a highly toxic metabolite, namely 4-OH chlorothalonil is not generated. A photosensitive degradation effect of OPC on chlorothalonil promotes dechlorination degradation of chlorothalonil, and the reducibility of OPC under the lighting condition promotes photochemical degradation of chlorothalonil in the aqueous solution; at the same time, a photolysis pathway of chlorothalonil is changed, thereby effectively avoiding generation of the highly toxic metabolite, namely 4-OH chlorothalonil.

Description

technical field [0001] The invention belongs to the technical field of pollutant treatment in water, and in particular relates to the treatment of chlorothalonil, an organic pollutant in water. More specifically, the present invention relates to a method of using natural plant extract proanthocyanidins as a chlorothalonil treatment agent in water, including natural water and farmland water pollution, and pre-treatment of high-concentration production pollution. Background technique [0002] Chlorothalonil (chlorothalonil) is a high-efficiency broad-spectrum fungicide, which is widely used all over the world. The main function of chlorothalonil is to prevent plants from being attacked by fungi. It can interact with 3-phosphate glyceraldehyde dehydrogenase in fungal cells, bind with proteins containing cysteine ​​in the enzyme body, and destroy the activity of the enzyme. , so that the metabolism of fungal cells is damaged and loses vitality. Chlorothalonil is highly toxic...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/32
CPCY02W10/37
Inventor 花日茂张军宋家龙史陶中吴祥为唐俊李学德操海群张蓉
Owner ANHUI AGRICULTURAL UNIVERSITY
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