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A kind of cadmium carbonate adsorption material in wheat field soil, preparation and application

An adsorption material, cadmium carbonate technology, applied in the field of environmental science and engineering, can solve the problems of long detection time, wide linear range, low sensitivity, etc., and achieve the effect of low detection limit, wide linear range and high targeting.

Active Publication Date: 2021-05-18
CHANGAN UNIV
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Problems solved by technology

[0006] In view of the shortcomings such as long detection time, low sensitivity, complicated operation and poor stability in the existing detection and analysis method of cadmium carbonate in wheat field soil, the purpose of the present invention is to provide a kind of cadmium carbonate adsorption material in wheat field soil, preparation and application, this material can greatly improve the capture efficiency of cadmium carbonate in wheat field soil, and has the characteristics of wide linear range, low detection limit and small relative standard deviation

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  • A kind of cadmium carbonate adsorption material in wheat field soil, preparation and application
  • A kind of cadmium carbonate adsorption material in wheat field soil, preparation and application
  • A kind of cadmium carbonate adsorption material in wheat field soil, preparation and application

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preparation example Construction

[0024] The preparation method of the cadmium carbonate adsorption material in the wheat field soil of the present invention is fast and convenient, and special ionic liquid, salt and grafted chelation gel are used in the preparation, and the filamentous active adsorption material has high targeting and trapping efficiency , the method can reach 98.9% penetration rate of cadmium carbonate in wheat field soil, has wide linear range, low detection limit, and small relative standard deviation, specifically, nitrogen ethyl pyridine glutamate: sodium succinate: The mass ratio of polyacrylamide-L-leucine grafted chelating gel is 7:2:1

[0025] The specific preparation process can be as follows: 12 parts of ionic liquid [EPy]GLU with a mass fraction of 29% and 58 parts of C with a mass fraction of 14% 4 h 4 Na 2 o 4 Mix evenly to obtain a two-phase aqueous extraction system, then add 30 parts of mass fraction of 45% L-leu-PAM-Gel to obtain a gel-like mixture, and burn the above-men...

Embodiment 1

[0031] 12 parts of ionic liquid [EPy]GLU with mass fraction of 29% and 58 parts of C with mass fraction of 14% 4 h 4 Na 2 o 4 Mix well to obtain a two-phase aqueous extraction system, then add 30 parts of 45% L-leu-PAM-Gel to obtain a gel-like mixture, burn the above-mentioned gel-like mixture at 170°C for two hours, and then Stored in a vacuum oven at 40° C. for 48 hours to prepare the adsorption material.

[0032] The soil to be adsorbed is mixed with the adsorbing material, and the amount of the adsorbing material added to the soil is 0.5% by mass percentage.

[0033] The permeability of the target before and after capture is recorded in Table 1.

Embodiment 2

[0035] The preparation method of this example is the same as that of 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 [BPy]BF4 (dipyridine tetrafluoroborate), and the rest of the conditions are different. Change, record the permeability of the target before and after capture, see Table 1.

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Abstract

The invention discloses an adsorption material for cadmium carbonate in wheat field soil, a preparation method and an application thereof. Specifically, the method comprises: nitrogen ethyl pyridine glutamate: sodium succinate: polyacrylamide-L- Leucine grafted chelate gel is obtained by burning after mixing; the burning temperature is 120-170°C; nitrogen ethyl pyridine glutamate: sodium succinate: polyacrylamide-L-leucine The mass ratio of grafted chelate gel is 1:7:2. The method for preparing the adsorption material in the present invention is fast and convenient, and special ionic liquid, salt and grafted chelating gel are used in the preparation, and the prepared adsorption material has high targeting and trapping efficiency. The permeability of cadmium carbonate can reach 98.9%. It has wide linear range, low detection limit and small relative standard deviation, and can meet the national detection requirements for cadmium carbonate in wheat field soil.

Description

technical field [0001] The invention belongs to the field of environmental science and engineering, and in particular relates to a cadmium carbonate adsorption material in wheat field soil, its preparation and application. Background technique [0002] The safety of agricultural products caused by cadmium pollution in farmland soil has attracted much attention. In the context of the current shortage of cultivated land resources in China, how to ensure the safe use of farmland soil polluted by medium and low concentrations of cadmium is a research hotspot and a difficulty. Although domestic and foreign scholars have repaired cadmium-contaminated farmland soil through physical, chemical, biological and chemical-biological techniques in recent decades, and achieved a series of research results, some of which have been promoted and implemented in production, due to the complexity of the soil itself, Some of the above research results cannot be applied in the real environment or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B09C1/00
CPCB01J20/265B01J20/28016B01J20/3078B01J20/3085B09C1/00
Inventor 李宇亮宗宇寒张楠徐帅朱棋马天培
Owner CHANGAN UNIV
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