A kind of heavy metal ion magnetically imprinted polymer and its preparation method

A technology of heavy metal ions and imprinted polymers, which is applied in the direction of testing metals, chemical instruments and methods, and the preparation of test samples. It can solve the problems of toxicity, small adsorption capacity, and low reuse rate, and achieve high selectivity and adsorption. The effect of large capacity and high reuse rate

Active Publication Date: 2021-09-17
ZHAOQING UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing magnetically imprinted polymers have the disadvantages of small adsorption capacity and low reusability. These chemicals have certain toxicity to the human body, and there is a certain risk in the detection of food samples

Method used

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  • A kind of heavy metal ion magnetically imprinted polymer and its preparation method
  • A kind of heavy metal ion magnetically imprinted polymer and its preparation method
  • A kind of heavy metal ion magnetically imprinted polymer and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for preparing a cadmium ion magnetically imprinted polymer, comprising the following steps:

[0030] (1) Contains 11.2mmol Fe 3+ and 5.6mmol Fe 2+ In 150mL aqueous solution, pass nitrogen to remove oxygen, heat to 80°C, stir at 500rmp, pass N 2 conditions, quickly add 12.5mL 25wt.% NH 3 ·H 2 O, react in a constant temperature water bath at 80°C for 30 minutes, let it stand still, magnetically absorb the magnetic nanoparticles through a magnet, pour off the supernatant, and wash 4 times with absolute ethanol and deoxygenated water (double distilled water twice) until the pH value is about 7 To remove impurities, vacuum dry;

[0031] Add 3.5mL of 2mol / L NaOH to 480mL of water, stir in a water bath at 350rpm at 80°C for 15min, add the Fe obtained above 3 o 4 160mg of magnetic nanoparticles, continue to stir for 15min, add 2mLTEOS drop by drop (after 5 minutes) for reaction, make the ratio of TEOS to water in the reaction system 1:70, the reaction time is 2h,...

Embodiment 2-7

[0035] On the basis of Example 1, Cd(NO 3 ) 2 respectively replaced by Co 2+ 、Ni 2+ 、Cu 2+ , Zn 2+ , Hg 2+ , Pb 2+ , Sn 2+ The soluble inorganic salts were prepared respectively to obtain magnetically imprinted polymers that specifically adsorb the corresponding metal ions.

Embodiment 8

[0037] With the cadmium ion magnetically imprinted polymer prepared in Example 1, magnetic solid phase extraction-graphite furnace atomic absorption spectrometry was established, and it was applied to Cd in the environment and food samples. 2+ Determination of: 0.03 g of cadmium ion magnetically imprinted polymer prepared in Example 1 was added to 100 mL of the processed sample solution, the pH value of the solution was adjusted to 6 with hydrochloric acid and sodium hydroxide, activated by ultrasonic treatment at room temperature, oscillated for 10 min, and magnetically Separated, washed twice, rinsed twice with 10.0mL deionized water, magnetically separated, washed with 10.0mL of 0.5mol·L -1 EDTA was ultrasonically washed for 10 min, and the resulting solution was evaporated to dryness by blowing nitrogen gas, and the volume was adjusted to 50 mL with 0.1% nitric acid, and the Cd was analyzed by graphite furnace atomic absorption spectrometry. 2+concentrations, the results a...

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Abstract

The invention provides a magnetically imprinted polymer and a preparation method thereof. Through yeast siliconization treatment, the rich multifunctional bond components on the surface are used to form a core-shell polymer structure with magnetic nanoparticles in a target heavy metal ion solution. The target heavy metal ions are then eluted to obtain a magnetically imprinted polymer with specific recognition and selective adsorption for the target heavy metal ions. The invention uses silicified yeast as a functional monomer, which not only realizes the comprehensive utilization of yeast, but also improves the safety of magnetically imprinted polymers, and has the advantages of excellent economy, large adsorption capacity, high selectivity, good stability, and easy to use. With the characteristics of long life and simple preparation process, it has broad application prospects in the rapid magnetic separation, enrichment and analysis of heavy metal ions in environmental samples, biological samples, agricultural products, and food.

Description

technical field [0001] The invention relates to the field of heavy metal ion enrichment, in particular to a heavy metal ion magnetically imprinted polymer and a preparation method thereof. Background technique [0002] With the development of modern industry, people pay more and more attention to the development mode of green and environmental protection. The public has already understood the hazards caused by heavy metals and has developed many treatment methods, including physical and chemical; the current harmless and resourceful treatment technologies for heavy metal wastewater are mainly chemical conversion technologies such as Electrolysis, etc.; medium extraction techniques such as solvent extraction, ion exchange, adsorption, etc.; physical and chemical concentration techniques such as electrodialysis, membrane osmosis, etc. However, the actual concentration of ions in heavy metal-polluted wastewater is generally low. If traditional treatment methods are used, the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30G01N33/00G01N33/02G01N21/31G01N1/34
CPCB01J20/06B01J20/103B01J20/24B01J2220/4806B01J2220/4868G01N33/20
Inventor 谢春生蓝文英韦寿莲
Owner ZHAOQING UNIV
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