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A kind of amino acid ionic liquid and its preparation method and application

An ionic liquid and amino acid technology, applied in the field of new chemical materials, can solve problems such as teratogenicity of organisms, deterioration of the surrounding ecological environment, ecological environment safety and human health threats, and achieve significant social and economic benefits, efficient extraction efficiency, excellent The effect of the extraction effect

Active Publication Date: 2021-04-27
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cadmium is not an essential element for the growth and development of organisms, but it can induce teratogenic, carcinogenic, and mutagenic organisms through various channels such as the atmosphere, surface and groundwater, and food chains, causing serious deterioration of the surrounding ecological environment, and affecting polluted soil and its surrounding ecology. Serious threats to environmental safety and human health
[0003] In recent years, some studies have begun to use ionic liquids to deal with heavy metal pollution. Although they have a certain extraction effect on heavy metal ions, the extraction efficiency is not high, and the cost and environmental protection of ionic liquids are not ideal.

Method used

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  • A kind of amino acid ionic liquid and its preparation method and application
  • A kind of amino acid ionic liquid and its preparation method and application
  • A kind of amino acid ionic liquid and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The preparation method of the amino acid ionic liquid in this example is as follows: weigh alanine and acetamide at a molar ratio of 1:4, mix and grind evenly, and ultrasonically vibrate at room temperature at 1.2 kW until a colorless, uniform and transparent amino acid ionic liquid is obtained.

[0028] The FT-IR figure of the amino acid ionic liquid gained in the present embodiment and 1 The HNMR diagrams are as follows figure 1 and figure 2 shown.

[0029] The structure of acetamide-alanine ionic liquid was determined by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectrometer (1HNMR). Infrared analysis data are as follows: NH, OH (3341cm -1 ); CH(2819.9cm -1 ); CO (1662.5cm -1 ); CH(1394.4cm -1 ); CN(1155.4cm -1 ). The NMR chemical shift values ​​are as follows: (500MHz, D 2 0, ppm); 4.28ppm (q, 1H, CH); 1.988ppm (s, 12H, CH3-CO); 1.394ppm (d, 3H, CH3-CH).

[0030] The ionic liquid of this example was added with water to...

Embodiment 2

[0036] Change the mol ratio of alanine and acetamide, prepare ionic liquid according to the identical condition of embodiment 1, its fusing point changes as follows image 3 shown.

Embodiment 3

[0038] The ionic liquid of embodiment 1 is used to extract Cd 2+ , the experimental process is as follows:

[0039] 25g CdSO 4 8 / 3H 2 O was fully dissolved in 20g of water, and 4g of sand was added for thorough stirring, and then dried at 120°C for 12h to constant weight as a simulated soil sample.

[0040] Weigh 0.2282g CdSO 4 8 / 3H 2 O was fully dissolved in ultrapure water and then settled in a 100mL volumetric flask to obtain Cd 2+ Cadmium standard solution with a concentration of 1g / L. It was diluted 100 times, 150 times, 200 times, 250 times, 300 times and 400 times respectively to obtain the standard curve.

[0041] Add water to the ionic liquid of Example 1 to make an aqueous solution, put 20ml of the ionic liquid solution into a round bottom flask, add the above-mentioned simulated soil sample at the same time, stir at 35°C for 3h for extraction, and centrifuge at 3500r / min for 15min after the extraction is complete , after the completion, the supernatant was ta...

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Abstract

The invention relates to the technical field of new chemical materials, and specifically discloses an amino acid ionic liquid and its preparation method and application. The amino acid ionic liquid is composed of alanine and acetamide, the raw materials are green and environmentally friendly, cheap and easy to obtain, the ionic liquid has a low melting point and a wide liquid range. The preparation method of the amino acid ionic liquid is obtained by grinding raw materials and performing solid phase reaction under ultrasonic conditions. The amino acid ionic liquid of the invention has a simple preparation process, and the application process can be designed and adjusted according to requirements, and is suitable for remediation of heavy metal, especially cadmium-contaminated soil.

Description

technical field [0001] The invention relates to the technical field of novel chemical materials, in particular to an amino acid ionic liquid and its preparation method and application. Background technique [0002] The sources of heavy metal pollution in my country's soil are extensive, mainly including sewage irrigation, sludge use, excessive application of chemical fertilizers and pesticides, industrial "three wastes" discharge and atmospheric deposition. A large amount of heavy metals enter the environment. According to statistics, every kilogram of urban sludge contains Cadmium up to several milligrams. Cadmium is not an essential element for the growth and development of organisms, but it can induce teratogenic, carcinogenic, and mutagenic organisms through various channels such as the atmosphere, surface groundwater, and food chains, causing serious deterioration of the surrounding ecological environment, and affecting the ecological environment of polluted soil and its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/02B01D11/02
CPCB01D11/02B09C1/02
Inventor 刘宝友李凤
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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