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
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[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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