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A kind of pesticide polluted soil remediation agent and preparation method thereof

A technology of pesticide-contaminated soil and remediation agent, which is applied in the field of pesticide-contaminated soil remediation agent and its preparation, which can solve problems such as inseparability, achieve low treatment cost, simple method, and improve the effect of remediation

Active Publication Date: 2020-11-03
GUANGZHOU EP ENVIROMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the existing pesticide-contaminated soil remediation agent mainly realizes the treatment of pesticide residues by mixing or plowing the soil to be repaired. mixed without being able to separate completely

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The embodiment of the present invention proposes a preparation method of a pesticide-contaminated soil remediation agent, comprising:

[0041] 15-20 parts by weight of carrier, 10-30 parts by weight of chitosan, 20-30 parts by weight of sodium polyacrylate, 10-15 parts by weight of sulfate filler, 2-5 parts by weight of antioxidant and 0.1-3 parts by weight of the ultraviolet absorber is added into the high-speed mixer, and mixed at a speed of 300-700r / min for 4-10 minutes to obtain a mixed material.

[0042] The mixed material is added into a screw extruder for granulation to obtain the pesticide-contaminated soil remediation agent. Specifically, the temperature of the feed section is controlled to be 190~200°C, the temperature of the compression section is 195~200°C, the temperature of the plasticizing section is 215~230°C, the temperature of the homogenization section is 210~225°C, and the die temperature is 205~220°C ℃.

[0043] Based on the above, adding antioxid...

Embodiment 1

[0046] 16 parts by weight of carrier, 15 parts by weight of chitosan, 22 parts by weight of sodium polyacrylate, 11 parts by weight of sodium sulfate, 3 parts by weight of β-(3,5-di-tert-butyl-4-hydroxy A mixture of n-octadecyl phenyl)propionate and tris(2,4-di-tert-butylphenyl)phosphite and 0.5 parts by weight of 2-(2'-hydroxy-3',5'-di tert-butylphenyl)-5-chlorobenzotriazole was added into the high-speed mixer, and mixed at a speed of 500r / min for 5min to obtain a mixed material.

[0047] Among them, the ratio of n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate to tris(2,4-di-tert-butylphenyl)phosphite is 1: 1.

[0048] Add the mixed material to the screw extruder for granulation, control the temperature of the feeding section at 190~200°C, the temperature of the compression section at 195~200°C, the temperature of the plasticizing section at 215~230°C, and the temperature of the homogenizing section at 210°C ~225°C, and the die temperature is 205~220°C to obtain...

Embodiment 2

[0050] 18 parts by weight of carrier, 22 parts by weight of chitosan, 24 parts by weight of sodium polyacrylate, 12 parts by weight of sodium sulfate, 4 parts by weight of β-(3,5-di-tert-butyl-4-hydroxy A mixture of n-octadecyl phenyl)propionate and tris(2,4-di-tert-butylphenyl)phosphite and 1 part by weight of 2-(2'-hydroxy-3',5'-di tert-butylphenyl)-5-chlorobenzotriazole was added into the high-speed mixer, and mixed at a speed of 500r / min for 6min to obtain a mixed material.

[0051] Among them, the ratio of n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate to tris(2,4-di-tert-butylphenyl)phosphite is 1.5: 2.5.

[0052] Add the mixed material to the screw extruder for granulation, control the temperature of the feeding section at 190~200°C, the temperature of the compression section at 195~200°C, the temperature of the plasticizing section at 215~230°C, and the temperature of the homogenizing section at 210°C ~225°C, and the die temperature is 205~220°C to obtai...

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Abstract

The invention provides a pesticide contaminated soil remediation agent and a preparation method thereof, and relates to the field of soil remediation. The preparation method of the pesticide contaminated soil remediation agent comprises the following steps: mixing, by weight, 15-20 parts of a carrier, 10-30 parts of chitosan, 20-30 parts of sodium polyacrylate, 10-15 parts of a sulfate filler, 2-5parts of an antioxidant and 0.1-3 parts of an ultraviolet absorber, and granulating the obtained mixture to obtain the pesticide contaminated soil remediation agent. The pesticide contaminated soil remediation agent is a granular structure, can realize the absorption of pesticides after being applied to the land, can be separated from the land after being screened in order to realize the thoroughseparation of the pesticide residues and soil, and effectively improves the repairing effect. The pesticide contaminated soil remediation agent has the advantages of good processing effect and low processing cost.

Description

technical field [0001] The invention relates to the field of soil remediation, and in particular to a pesticide-contaminated soil remediation agent and a preparation method thereof. Background technique [0002] Soil pesticide pollution refers to the input or discharge of pesticides in the soil environment that exceed its whitening ability, resulting in the reduction of soil environmental quality, affecting soil productivity and endangering environmental biological safety. [0003] At present, the existing pesticide-contaminated soil remediation agent mainly realizes the treatment of pesticide residues by mixing or plowing the soil to be repaired. However, after the existing remediation agent absorbs the pesticide residue, it is still in the remediation soil. mixed without being able to separate completely. [0004] In view of this, the present invention is proposed. Contents of the invention [0005] The first object of the present invention is to provide a pesticide-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/08B09C1/00
CPCB09C1/00B09C1/08B09C2101/00C09K17/40
Inventor 阳重阳曹姝文李锐敬许嘉辉杨炜雯周文栋王文静王志刚黄睦凯
Owner GUANGZHOU EP ENVIROMENTAL ENG