A kind of hydroxyethyl cellulose hydrogel for adsorbing heavy metal ions and preparation method and application thereof

A technology for hydroxyethyl cellulose to adsorb heavy metals, applied in the direction of adsorption of water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of insufficient adsorption performance of heavy metal ions, etc., and achieve flexible, adjustable and good adsorption performance Regeneration performance, effect of achieving adsorption and enrichment

Active Publication Date: 2022-07-08
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of the existing hydroxyethyl cellulose hydrogel, such as the insufficient adsorption performance of heavy metal ions, and provide a novel hydroxyethyl cellulose hydrogel

Method used

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  • A kind of hydroxyethyl cellulose hydrogel for adsorbing heavy metal ions and preparation method and application thereof
  • A kind of hydroxyethyl cellulose hydrogel for adsorbing heavy metal ions and preparation method and application thereof
  • A kind of hydroxyethyl cellulose hydrogel for adsorbing heavy metal ions and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 0.33g 2.0-generation polyamide-amine dendrimers in 30g / L NaOH solution, add 1.00g hydroxyethyl cellulose to the NaOH solution of polyamide-amine dendrimers while stirring rapidly, and wait for After completely dissolving and mixing uniformly, a mixed solution of polyamide-amine dendrimer and hydroxyethyl cellulose is obtained. 0.59 g of epichlorohydrin was added to the above mixed solution and stirred evenly, and then the mixed reaction solution was placed under a constant temperature of 60° C. for a cross-linking reaction for 4 hours. After the reaction is completed, solid-liquid separation is performed, and the product is washed alternately with water and ethanol for more than 3 times, and then dried at 40° C. to obtain a dry hydroxyethylcellulose-based adsorption hydrogel.

[0027] In order to fully understand the microstructure of the hydrogels prepared in the various embodiments of the present invention, taking the hydrogel product of Example 1 as an examp...

Embodiment 2

[0035] Dissolve 0.23g 2.0-generation polyamide-amine dendrimer in 30g / L NaOH solution, then add 1.00g of hydroxyethyl cellulose to the NaOH solution of the polyamide-amine dendrimer while stirring rapidly, wait for After it is completely dissolved and mixed uniformly, a mixed solution of polyamide-amine dendrimer and hydroxyethyl cellulose is obtained. 0.59 g of epichlorohydrin was added to the above mixed solution and stirred evenly, and then the mixed reaction solution was placed under a constant temperature of 60° C. for a cross-linking reaction for 4 hours. After the reaction is completed, solid-liquid separation is performed, the product is washed alternately with water and ethanol for at least three times, and then dried at 40° C. to obtain a dry hydroxyethyl cellulose-based adsorption hydrogel.

[0036] The adsorption performance test was also carried out on the hydrogel prepared in Example 2. The results showed that when the initial concentration of chromium ions was 5...

Embodiment 3

[0038]Dissolve 0.09g 2.0-generation polyamide-amine dendrimer in 30g / L NaOH solution, then add 1.00g hydroxyethyl cellulose to the NaOH solution of the polyamide-amine dendrimer while stirring rapidly, and wait until After it is completely dissolved and mixed uniformly, a mixed solution of polyamide-amine dendrimer and hydroxyethyl cellulose is obtained. 0.59 g of epichlorohydrin was added to the above mixed solution and stirred evenly, and then the mixed reaction solution was placed under a constant temperature of 60° C. for a cross-linking reaction for 4 hours. After the reaction is completed, solid-liquid separation is performed, and the product is washed alternately with water and ethanol for more than 3 times, and then dried at 50° C. to obtain a dry hydroxyethylcellulose-based adsorption hydrogel.

[0039] The adsorption performance test was also carried out on the hydrogel prepared in Example 3. The results showed that when the initial concentration of chromium ions was...

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Abstract

The invention relates to a hydroxyethyl cellulose hydrogel for adsorbing heavy metal ions, a preparation method thereof and an application in sewage treatment. Taking natural macromolecular hydroxyethyl cellulose as the base material, using polyamide-amine dendrimer to modify it, and cross-linking with epichlorohydrin, the obtained hydrogel contains a large number of amino structures, which is harmful to heavy metals. Chromium ions have excellent adsorption properties and can be regenerated and reused. The hydrogel has good application prospects in the treatment of wastewater containing chromium ions.

Description

technical field [0001] The invention relates to the technical field of adsorption materials and environmental protection, in particular to a hydroxyethyl cellulose hydrogel and a preparation method thereof and application in the treatment of heavy metal ions. Background technique [0002] The rapid development of today's industry has produced a large number of heavy metal ions (such as Cr 6+ , Cd 2+ , Hg 2+ , Pb 2+ , Cu 2+ , Ni 2+ etc.) waste, which pollutes the environment through various channels. Heavy metal ion pollution mainly comes from the discharge of three wastes in electroplating, metallurgy and dyestuff industries. Some heavy metal ions that exceed the standard are very harmful to organisms, and even induce cancerous cells. Therefore, it is of great significance to effectively deal with the excessive heavy metal ions in the environment. At present, the treatment methods of heavy metal ions usually include adsorption method, electrochemical method and biolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J3/24C08L1/28C08L79/02B01J20/24B01J20/30C02F1/28C02F101/20
CPCY02W10/37
Inventor 何广华陶彦君江靖吕翠芳柴赟赵洒
Owner WUHAN UNIV OF TECH
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