Heavy metal imprinted solid phase extraction material prepared by aid of microwave-reverse phase emulsion suspension and application of heavy metal imprinted solid phase extraction material

A technology of solid phase extraction materials and inverse emulsions, which is applied in the field of preparation of heavy metal imprinted solid phase extraction materials, can solve problems such as uneven heating, flocculation and precipitation, long reaction time of ion imprinted polymers, etc., to achieve shortened reaction time and simple operation , the effect of high yield

Inactive Publication Date: 2017-10-17
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional water-bath heating method requires a long reaction time to prepare ion-imprinted polymers, and sometimes uneven heating and flocculation and precipitation may occur.

Method used

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  • Heavy metal imprinted solid phase extraction material prepared by aid of microwave-reverse phase emulsion suspension and application of heavy metal imprinted solid phase extraction material
  • Heavy metal imprinted solid phase extraction material prepared by aid of microwave-reverse phase emulsion suspension and application of heavy metal imprinted solid phase extraction material
  • Heavy metal imprinted solid phase extraction material prepared by aid of microwave-reverse phase emulsion suspension and application of heavy metal imprinted solid phase extraction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 0.3mmol of span80, 30mmol of cross-linking agent EGDMA, and 3mL of toluene to the three-necked flask, and 1mmol of CdCl 2 2.5H 2 O was dissolved in water, added to a three-necked flask, and 1 mmol of salicylaldehyde ethylenediamine Schiff base, a functional monomer, was added thereto, and stirred at 30° C. for 60 minutes at high speed to obtain an inverse emulsion. Add 3mmolFe 3 o 4 , continue stirring.

[0039] Weigh magnesium sulfate and SDBS with a molar ratio of 1:1 and dissolve them in water, add them into a three-neck flask, adjust the pH to 5, and continue stirring.

[0040] Raise the temperature to 70° C., add 1 mmol of azobisisobutyronitrile as an initiator, put it into a microwave reactor and react at 40 W for 30 minutes.

[0041] After the microwave is completed, the solution is filtered to obtain a spherical polymer, and the cadmium ions are eluted with a hydrochloric acid solution, shaken in a water bath at 20°C for 8 hours, and vacuum filtered to o...

Embodiment 2

[0049] Add 0.5mmol of span20, 40mmol of cross-linking agent trimethylolpropane trimethacrylate into the three-necked flask, and add 5mL of toluene, 0.2mmol of CuCl 2 Dissolve it in water, put it into a three-necked flask, add 20 mmol of functional monomer methoxy salicylaldehyde benzylamine Schiff's base, and stir at 40°C for 50 minutes at high speed to obtain an inverse emulsion. Add 5mmolFe 3 o 4 , continue stirring.

[0050] Weigh magnesium sulfate and SDBS with a molar ratio of 1:2 and dissolve them in water, add them into a three-necked flask, adjust the pH to 5, and continue stirring.

[0051] Raise the temperature to 70° C., add 5 mmol of azobisisoheptanonitrile as an initiator, put it into a microwave reactor and react at 640 W for 1 min.

[0052] After the microwave is completed, the solution is filtered to obtain a spherical polymer, and the cadmium ion is eluted with a hydrochloric acid solution, shaken in a water bath at 30°C for 7 hours, and vacuum filtered to ...

Embodiment 3

[0060] Add 0.1mmol of span40, 80mmol of cross-linking agent trimethylolpropane trimethacrylate into the three-necked flask, and add 8mL of toluene solvent, 3mmol of FeCl 3 ·6H 2 O was dissolved in water, added to a three-necked flask, and 30 mmol of functional monomer histidine salicylaldehyde Schiff base was added thereto, and stirred at 60° C. for 10 minutes at high speed to obtain an inverse emulsion. Add 2mmolFe 3 o 4 , continue stirring.

[0061] Weigh magnesium sulfate and SDBS with a molar ratio of 1:5 and dissolve them in water, add them into a three-necked flask, adjust the pH to 5, and continue stirring.

[0062] Raise the temperature to 70° C., add 0.1 mmol of dimethyl azobisisobutyrate as an initiator, put it into a microwave reactor and react at 400 W for 2 minutes.

[0063] After the microwave is completed, the solution is filtered to obtain a spherical polymer, and the cadmium ion is eluted with a nitric acid solution, shaken for 5 hours in a water bath at 5...

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Abstract

The invention relates to the field of environment functional materials, in particular to a method for preparing a heavy metal imprinted solid phase extraction material by the aid of microwave-reverse phase emulsion suspension processes and application of the heavy metal imprinted solid phase extraction material. The method and the application have the advantages that stable chelate compounds can be easily formed by metal ions and C=N bonds and -OH bonds in Schiff base substances and are perfect functional monomers for preparing an ion imprinted polymer; grinding can be omitted in procedures for preparing the ion imprinted polymer by the aid of reverse phase emulsion suspension polymerization processes, the procedures are easy to implement, and the heavy metal ion imprinted polymer is of a uniform spherical structure and is excellent in adsorption capacity, selective recognition capacity and stability; magnetic materials are favorable for follow-up separation work; the reaction time can be shortened to a great extent by microwave-assisted processes, the reaction rates can be increased by the microwave-assisted processes, and the ion imprinted polymer is high in yield and is pure; the heavy metal ion imprinted polymer can be used as the solid phase extraction material, and ion pollutants in wastewater can be separated and enriched by the heavy metal ion imprinted polymer.

Description

technical field [0001] The invention relates to the field of environmental functional materials, in particular to a heavy metal imprinted solid-phase extraction material prepared by using a microwave-inverse emulsion suspension polymerization method and its application. Background technique [0002] The problem of heavy metal environmental pollution has attracted the attention of the people. The wanton discharge of heavy metal pollutants will cause serious harm to the environment and human health. Heavy metal ions in the environment are not easy to be degraded, and they are easy to be enriched through the food chain and cause health problems. Therefore, it is of great importance to develop a method for treating heavy metal ions in wastewater that has a good separation effect on heavy metals, can detect trace heavy metals in water, and can be reused. [0003] Ion imprinting technology is to form a polymer with a rigid structure through the action of template ions and functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/32C08F122/14C08F222/14C02F1/26C02F101/20
CPCC02F1/26C02F2101/20C08F2/32C08F122/1006C08F222/1006C08F222/102C08F222/103
Inventor 祝方李璐玮邢俊德高亚琴
Owner TAIYUAN UNIV OF TECH
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