Application of chelating polymer resin in removing pesticide residue

A polymer resin and pesticide residue technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of secondary pollution, soil residue, pesticide impact, etc., and achieve increased chelation capacity, easy synthesis, and convenient preparation Effect

Inactive Publication Date: 2010-09-22
BEIJING OKEANOS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

2. Pesticide residues in the soil have seriously affected agricultural production
The irrational use of pesticides leads to frequent injury accidents, which often lead to large-scale production reduction or even extinction of crops; many pesticides have a long half-life, and will remain in the soil for a long time after application, which is very easy to cause phytotoxicity to sensitive crops in the future.
3. Pesticide residues have seriously affected import and export trade
Excess

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] One, the preparation of polymer resin C

[0053] Weigh 100 g of commercially available cross-linked benzylamino polystyrene resin A, repeatedly wash with 500 mL of ethanol, filter, and dry to obtain purified resin A. Swell the purified resin A with 250 mL of ethanol. Add the swollen resin A to 625mL ethanol, add 103.3g phosphorous acid, 37.8g paraformaldehyde and 34.2g concentrated hydrochloric acid, heat to 70°C, stir for 16h, then cool to room temperature, filter, and wash the resin with distilled water until washed The liquid is neutral. After the resin was dried, it was washed continuously with 250 mL of absolute ethanol, 50 g of 5% sodium hydroxide solution, 300 mL of deionized water, 50 g of 5% hydrochloric acid, and 500 mL of deionized water until the pH of the washing solution was 6.0. The resin was added to a solution of 30.5 g of ferric chloride and 275 mL of water. Stir at 30° C. for 12 h, filter, wash with deionized water until no ferric ions can be detec...

Embodiment 2

[0061] Get 800 grams of commercially available rapeseed, put into 2400 grams of tap water after cutting. Add 12 grams of the polymer resin D described in Example 1 of the present invention, stir vigorously for 15 minutes, and then filter.

[0062] The NY-IV pesticide residue tester produced by Beijing Qiangsheng Analytical Instrument Manufacturing Center was used to measure the rapeseed before and after treatment, and the results are shown in Table 1:

[0063] Table 1

[0064] Enzyme inhibition rate

[0065] It can be seen that the enzyme inhibition rate of rapeseed treated with polymer resin D has been reduced from 56% to 29% as measured by the NY-IV pesticide residue detector, reaching the level where the pesticide residues do not exceed the standard.

Embodiment 3

[0067] Get 250 grams of watermelon juice produced by a certain company, add 5 grams of polymer resin D described in Example 1 of the present invention, stir vigorously for 30 minutes, filter, and collect the filtrate.

[0068] The NY-IV type pesticide residue measuring instrument produced by Beijing Qiangsheng Analytical Instrument Manufacturing Center is used to measure the watermelon juice before and after treatment, and the results are shown in Table 2:

[0069] Table 2

[0070] Enzyme inhibition rate

[0071] reading

[0072]It can be seen that the enzyme inhibition rate of the watermelon juice treated with the polymer resin D has been reduced from 51% to 25% as measured by the NY-IV pesticide residue analyzer, reaching the level where no pesticide residues are detected.

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PUM

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Abstract

The invention provides application of chelating polymer resin in removing pesticide residue, and the resin is polystyrene resin with cross-linking of benzyl amine dithiocarbamate and ferric ions loaded on benzylamine methylene phosphate; the chelating polymer resin is convenient to prepare; because dithiocarbamate base is introduced, the chelating capacity of the resin to heavy metal is greatly increased; and invention can efficiently, quickly and conveniently remove a plurality of types of pesticide residue in agricultural products or food, so that the agricultural products or food can meet relevant national standards of pesticide residue, and is a good method which can be popularized and has industrial prospect.

Description

technical field [0001] The invention relates to the technical field of polymer resins, in particular to a polystyrene chelating polymer resin in which cross-linked benzylamino dithioformates and ferric ions are supported on benzylamino methylene phosphoric acid groups Application in the removal of pesticide residues. Background technique [0002] Pesticides are important means of production to ensure high yields in industries such as agriculture, forestry and animal husbandry. The large-scale promotion and use of pesticides has ensured the continuous increase in the output of agricultural, forestry and animal husbandry products, and has become an important means of improving human food supply; secondly, pesticides are also used to kill and control mosquitoes that endanger human and animal hygiene and health. , Flies, lice, fleas and peaks and other pests and germs, so that people and animals can live peacefully and stably, and grow up healthily. Therefore, the importance o...

Claims

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Application Information

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IPC IPC(8): C08F12/08C08F8/42C08F8/40C08F8/34B01J20/26
Inventor 许峰高源
Owner BEIJING OKEANOS TECH
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