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Preparation method and application of a tridentate ligand heavy metal ion imprinted material

A technology of metal ion imprinting and heavy metal ions, which is applied in chemical instruments and methods, improvement of process efficiency, and other chemical processes, etc., can solve the problems of poor selectivity, easy loss of materials, and low adsorption capacity, and achieve easy separation and less loss. , the effect of increasing the adsorption capacity

Active Publication Date: 2022-07-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a preparation method and application of a tridentate ligand heavy metal ion imprinting material to solve the problems of low adsorption capacity, poor selectivity, and easy loss of materials in traditional ion imprinting materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a tridentate ligand heavy metal ion imprinted material, comprising the following steps:

[0027] a) Immerse the grafted acrylic fiber in a sodium silicate solution with a mass fraction of 5%, take out and remove the excess solution, put it into a calcium chloride solution with a mass percentage concentration of 5%, and crosslink it for 0.5 hours. The uncrosslinked sodium silicate is washed with deionized water, and activated in a hydrochloric acid solution to obtain a grafted fiber with a mesoporous silica gel layer on the surface.

[0028] b) Put the grafted fibers with a mesoporous silica gel layer on the surface into a methanol solution of 3-(2-aminoethylamino)propyltrimethoxysilane with a mass fraction of 2%, heat under reflux for 8 hours, and obtain after the reaction is completed. Surface aminated fiber-based polymers;

[0029] c) Add the surface aminated fiber-based polymer to a chloroacetic acid solution with a mass fraction of 1%, and h...

Embodiment 2

[0033] A preparation method of a tridentate ligand heavy metal ion imprinted material, comprising the following steps:

[0034] a) Immerse the grafted acrylic fiber in a sodium silicate solution with a mass fraction of 10%, take out and remove the excess solution, put it in a calcium chloride solution with a mass percentage concentration of 10%, and cross-link for 2 hours. The uncrosslinked sodium silicate is washed with deionized water, and activated in a hydrochloric acid solution to obtain a grafted fiber with a mesoporous silica gel layer on the surface.

[0035] b) Put the grafted fibers with a mesoporous silica gel layer on the surface into a methanol solution of 3-(2-aminoethylamino)propyltrimethoxysilane with a mass fraction of 5%, heat under reflux for 13 hours, and obtain after the reaction is completed. Surface aminated fiber-based polymers;

[0036] c) Add the surface aminated fiber-based polymer to a chloroacetic acid solution with a mass fraction of 2%, heat and...

Embodiment 3

[0040] A preparation method of a tridentate ligand heavy metal ion imprinted material, comprising the following steps:

[0041] a) Immerse the grafted acrylic fiber in a sodium silicate solution with a mass fraction of 15%, take out and remove the excess solution, put it into a calcium chloride solution with a mass percentage concentration of 15%, and crosslink it for 1.5 hours. The uncross-linked sodium silicate is washed with deionized water, and activated in a hydrochloric acid solution to obtain a grafted fiber with a mesoporous silica gel layer on the surface.

[0042] b) Put the grafted fibers with a mesoporous silica gel layer on the surface into a methanol solution of 3-(2-aminoethylamino)propyltrimethoxysilane with a mass fraction of 10%, and heat under reflux for 24 hours. Surface aminated fiber-based polymers;

[0043] c) Add the surface aminated fiber-based polymer to a chloroacetic acid solution with a mass fraction of 10%, heat under reflux at 80° C. for 10 hour...

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Abstract

The invention provides a preparation method and application of a tridentate ligand heavy metal ion imprinted material. The preparation method includes the following steps: immersing the grafted acrylic acid fiber in a sodium silicate solution, and then adding calcium chloride In the solution, cross-linked, put into a hydrochloric acid solution for activation, then put into a methanol solution of 3-(2-aminoethylamino)propyltrimethoxysilane, heated to reflux, after the reaction is completed; add it into a chloroacetic acid solution After the reaction is completed, the fiber is taken out and washed with water to neutralize it. After drying, it is put into the target heavy metal ion solution to adsorb the heavy metal ions on the surface of the material. Heating and refluxing at 40-80° C. for 4-24 hours, after the reaction, eluted with nitric acid and EDTA solution, washed with water until neutral, and dried to obtain a heavy metal ion imprinted polymer. The invention solves the problems of low adsorption capacity, poor selectivity, easy loss of materials and the like of traditional ion imprinting materials.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a preparation method and application of a tridentate ligand heavy metal ion imprinted material. Background technique [0002] With the acceleration of industrialization and urbanization, a large amount of wastewater containing heavy metal ions is discharged into the environment through various channels, increasing the heavy metal burden on the environment and causing serious heavy metal pollution in water. Long-term exposure to heavy metals can cause many environmental problems, and because heavy metals cannot undergo biodegradation and thermal degradation, the clearance rate in the human body is low, and they can only be enriched in the organism, and then enter the human body through the food chain, and accumulate in the human body. It can cause developmental disorders and organ damage in the human body. At present, the treatment methods of heavy metal ions in wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/24C02F1/285C02F2101/20Y02P10/20
Inventor 孔志云黄纬斌樊龙伟杜亚杰邹凯健狄然魏俊富
Owner TIANJIN POLYTECHNIC UNIV