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A kind of magnetic pesticide loss control agent, preparation method and application

A loss control agent and pesticide technology, applied in the field of agriculture, can solve the problem of poor ability to resist rainwater

Active Publication Date: 2021-05-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology alleviates the loss of pesticides to a certain extent, it still cannot work in the rainy season due to its weak ability to resist rainwater

Method used

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  • A kind of magnetic pesticide loss control agent, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of magnetic pesticide loss control agent:

[0022] (1) Mix quicklime (50 mesh) and weathered coal (humic acid mass content 20%, 50 mesh) according to the mass ratio of 1:3, and add the mixture to tap water to configure the initial concentration (quicklime When it is just added to water), it is a suspension of 50g / L, stir at room temperature (100rpm) for 30 minutes, and react quicklime with water (CaO+H20=Ca(OH) 2 ), the generated Ca(OH) 2 It can alkaline hydrolyze the macromolecule humic acid in weathered coal into small molecule fulvic acid, which contains a large number of carboxyl and hydroxyl groups;

[0023] (2) ammonium persulfate (50 orders), ferric oxide (50 orders), attapulgite (50 orders) are mixed according to the mass ratio of 1:1:6;

[0024] (3) Add the mixture obtained in (2) into (1) according to the concentration of 50g / L, and stir (100rpm) for 10 minutes at 30 degrees Celsius, wherein the ammonium persulfate will oxidize the remai...

Embodiment 2

[0028] A preparation method of magnetic pesticide loss control agent:

[0029] (1) Mix quicklime (70 mesh) and weathered coal (30% humic acid mass content, 70 mesh) according to the mass ratio of 1:2, and add the mixture to tap water to configure the initial concentration (quicklime When just added to water) is a suspension of 70g / L, stir at room temperature (150rpm) for 40 minutes to make quicklime react with water (CaO+H20=Ca(OH) 2 ), the generated Ca(OH) 2 It can alkaline hydrolyze the macromolecule humic acid in weathered coal into small molecule fulvic acid, which contains a large number of carboxyl and hydroxyl groups;

[0030] (2) ammonium persulfate (70 orders), ferric oxide (70 orders), attapulgite (70 orders) are mixed according to the mass ratio of 1:1:7;

[0031] (3) Add the mixture obtained in (2) to (1) according to the concentration of 70g / L, and stir (150rpm) at 50 degrees Celsius for 20 minutes, wherein the ammonium persulfate will oxidize the remaining larg...

Embodiment 3

[0035] A preparation method of magnetic pesticide loss control agent:

[0036] (1) Mix quicklime (100 mesh) and weathered coal (humic acid mass content 40%, 100 mesh) according to the mass ratio of 3:5, and add the mixture to tap water to configure the initial concentration (quicklime When it is just added to water), it is a suspension of 100g / L, stir at room temperature (200rpm) for 50 minutes, and react quicklime with water (CaO+H20=Ca(OH) 2 ), the generated Ca(OH) 2 It can alkaline hydrolyze the macromolecule humic acid in weathered coal into small molecule fulvic acid, which contains a large number of carboxyl and hydroxyl groups;

[0037] (2) ammonium persulfate (100 orders), ferric oxide (100 orders), attapulgite (100 orders) are mixed according to the mass ratio of 2:2:9;

[0038] (3) Add the mixture obtained in (2) to (1) according to the concentration of 80g / L, and stir (200rpm) at 80 degrees Celsius for 30 minutes, wherein the ammonium persulfate will oxidize the r...

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Abstract

The invention discloses a magnetic pesticide loss control agent, a preparation method and an application. The magnetic pesticide loss control agent is compounded from attapulgite and alkali / ammonium persulfate modified weathered coal. The preparation method is as follows: mix quicklime and weathered coal, add it into water, and prepare a suspension; mix ammonium persulfate, ferric oxide, and attapulgite into the suspension, filter, and dry the filter residue to constant weight to obtain a magnetic pesticide loss control agent. The magnetic pesticide loss control agent is added to the pesticide to obtain the loss control pesticide. The magnetic pesticide loss control agent provided by the present invention is developed through physical and chemical modification, which can effectively improve the adhesion ability of pesticides on crops, reduce the migration rate of pesticides, reduce volatilization, improve its resistance to water leaching, and realize pesticide Reduce application and increase efficiency, so as to achieve the purpose of controlling loss. When the control is over, the magnetic pesticide loss control agent on the crops can be recovered together with the pesticides through the magnet to reduce pesticide residues.

Description

technical field [0001] The invention relates to a magnetic pesticide loss control agent, a preparation method and application, and belongs to the field of agricultural technology. Background technique [0002] Pesticides are an indispensable means of production in the agricultural production process, and have played an indispensable role in preventing and controlling crop diseases and insect pests, ensuring food production, and promoting the healthy development of agriculture. According to statistics from the Food and Agriculture Organization of the United Nations, if there is no control of pests and diseases by pesticides, the world's food loss will be as high as 30-40%, and for some special crops, it will cause a significant reduction in production, or even extinction. The annual output of pesticides in the world is more than 5 million tons. While controlling pests and diseases and increasing production, pesticides also have adverse effects on human living environment, he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/24A01N57/16A01P7/04
CPCA01N25/24A01N57/16
Inventor 蔡冬清王冬芳吴正岩仲乃琴宗志强叶静宏张小江
Owner DONGHUA UNIV