Adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and preparation method and application of adsorption material

A technology of dichlorophenoxyacetic acid and adsorption materials, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of long extraction time, expensive equipment, complicated operation, etc., and achieve The effect of avoiding secondary pollution, easy operation and high collection efficiency

Inactive Publication Date: 2019-03-08
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the disadvantages of long extraction time, expensive equipment, complicated operation and low extraction rate in the existing 2,4-dichlorophenoxyacetic acid extraction method, the purpose of the present invention is to provide a kind of 2,4-dichlorophenoxyacetic acid extraction method in wheat Oxyacetic acid adsorption material, preparation method and application thereof, for separating and extracting 2,4-dichlorophenoxyacetic acid

Method used

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  • Adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and preparation method and application of adsorption material
  • Adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and preparation method and application of adsorption material
  • Adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and preparation method and application of adsorption material

Examples

Experimental program
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preparation example Construction

[0024] The specific preparation process can be: mix 73 parts of CH3COONa with a mass fraction of 25% and 17 parts of DMA-PAM-Gel with a mass fraction of 44% to obtain a gel-like mixture, and then add 10 parts with a mass fraction of 19% ion Liquid tetrabutylammonium bromide ([TBA]Br), put the above mixture in a high-pressure reactor, react at 150-170°C for two hours (obtain powder particles), and then store it at 20-40°C Stand still in a vacuum oven for 24 to 48 hours to prepare a triangular ionic liquid active adsorption material.

[0025] Polyacrylamide-dimethylacetamide grafted chelating gel (DMA-PAM-Gel): polyacrylamide gel (PAM-Gel, Gongyi Yurun Haiyuan Water Purification Material Co., Ltd.) Methylacetamide (Jinan Century Tongda Chemical Co., Ltd.) is a graft chelating agent, and under the participation of formaldehyde, according to the Mannich reaction, a chelating group graft gel is prepared;

[0026] Tetrabutylammonium bromide ([TBA]Br): Shanghai Chengjie Chemical Co....

Embodiment 1

[0030] 73 parts by mass fraction of 25% CH3COONa and 17 parts by mass fraction of 44% DMA-PAM-Gel are mixed homogeneously to obtain a gel-like mixture, and then 10 parts by mass fraction of 19% ionic liquid tetrabutylammonium bromide are added ([TBA]Br), the above mixture was placed in a high-pressure reactor, reacted for two hours at 150 ° C, and then stored in a vacuum oven at 40 ° C for 48 hours to prepare a triangular ionic liquid active adsorption material .

[0031] The adsorption material was taken out and used to capture 2,4-dichlorophenoxyacetic acid in wheat, and the permeability of the target before and after capture was recorded in Table 1.

Embodiment 2

[0033] The preparation method of this example is the same as Example 1, the only difference is that the type of ionic liquid in the preparation process is different, in this example, the ionic liquid is changed to [cmmim][PF6](1-acetoxy-3-methylimidazole hexafluorophosphate), and the rest of the conditions were unchanged, and the permeability of the target before and after capture was recorded in Table 1.

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Abstract

The invention discloses an adsorption material for 2,4-dichlorophenoxyacetic acid in wheat and a preparation method and application of the adsorption material. The method includes the step that tetrabutylammonium bromide, sodium acetate and polyacrylamide-dimethylacetamide grafted chelated gel are mixed to prepare the adsorption material through a sol-gel method, wherein the reaction temperature is 150-170 DEG C, and a mass ratio of tetrabutylammonium bromide to sodium acetate to polyacrylamide-dimethylacetamide grafted chelated gel is 8:1:1. The preparation method of the adsorption material is quick and convenient; by adoption of special ionic liquid, salt and grafted chelated gel in preparation, the prepared triangular ionic liquid active adsorption material is high in targeting and collecting efficiency, and the recovery rate of 2,4-dichlorophenoxyacetic acid in wheat reaches 98.9%. In addition, the adsorption material is wide in linear range, low in detection limit and low in relative standard deviation, and the national detection requirement of 2,4-dichlorophenoxyacetic acid in wheat can be met.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a 2,4-dichlorophenoxyacetic acid adsorption material in wheat, a preparation method and an application thereof. Background technique [0002] 2,4-Dichlorophenoxyacetic acid (2,4-D) is a commonly used plant growth regulator and herbicide, and is widely used to improve fruit quality and prolong the insurance time, but due to its non-degradable characteristics, resulting in a large number of residual problems in nature, causing serious harm to our ecological environment and human health. 2,4-Dichlorophenoxyacetic acid is potentially carcinogenic and mutagenic when it enters the body. It can stimulate the human body to secrete a large amount of estrogen, interfere with the endocrine system, and have adverse effects on the reproductive and endocrine systems. In addition, it will also aggregate red blood cells, hinder the oxygen-carrying capacity of red blood cells, damage musc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/264B01J20/28047
Inventor 李宇亮李轩朱棋徐帅宗宇寒马天培
Owner CHANGAN UNIV
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