Ionic liquid crosslinked chitosan modified zeolite adsorbent material, preparation method and application thereof

A cross-linked chitosan and ionic liquid technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve good resource recycling value and application prospects, increase active sites, and reduce costs Effect

Inactive Publication Date: 2017-06-20
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Since heavy metal ions in wastewater do not exist alone, most of them only studied the adsorption effect of modified zeolite on a single metal ion with the same electrical cond

Method used

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  • Ionic liquid crosslinked chitosan modified zeolite adsorbent material, preparation method and application thereof
  • Ionic liquid crosslinked chitosan modified zeolite adsorbent material, preparation method and application thereof
  • Ionic liquid crosslinked chitosan modified zeolite adsorbent material, preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0042] Example 1:

[0043] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:

[0044] (1) Take 10g of chitosan (acetylation ≥95%), mix it with 50g of functionalized ionic liquid 1-hydroxyethyl-3-methylimidazole chloride in a weight ratio of 1:5, and stir for 1 hour to make The two substances undergo a cross-linking reaction to increase the functionality of chitosan and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);

[0045] (2) Take 10g of the above-mentioned primary cross-linked chitosan-ionic liquid solution, and add the liquid polymer to the chitosan-ionic liquid solution, polyethylene glycol and epichlorohydrin at a weight ratio of 20:1:1. 0.5g of ethylene glycol PEG600 and 0.5g of epichlorohydrin, mechanically stirred at 80℃ for 4 hours to make pores and crosslink the product, so that the porosity of the product reaches 50% and the degree of crosslinking increases to 60 % To obtain a secondary crosslinked...

Example Embodiment

[0048] Example 2:

[0049] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:

[0050] (1) Take 10g of chitosan (acetylation ≥95%) and mix it with 30g of functionalized ionic liquid 1-carboxymethyl-3-methylimidazole hexafluorophosphate according to the weight ratio of 1:3, and stir and react for 1 hour , Make the two substances cross-linking reaction, improve the functionality of chitosan, and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);

[0051] (2) According to the weight ratio of chitosan-ionic liquid solution and polyethylene glycol of 25:1, and the weight ratio of chitosan-ionic liquid solution to epichlorohydrin of 25:1, take the above-mentioned cross-linked shell 10g of glycan-ionic liquid solution, add 0.4g of liquid polyethylene glycol PEG600, add 0.4g of epichlorohydrin, and mechanically stir at 80℃ for 4 hours to make holes and crosslink the product to make the product The porosity reaches 50%, the...

Example Embodiment

[0054] Example 3:

[0055] Preparation method of ionic liquid cross-linked chitosan modified zeolite adsorption material:

[0056] (1) Take 10g of chitosan (acetylation ≥95%) and mix it with 80g of functionalized ionic liquid N-sulfonic acid butylpyridine bisulfate in a weight ratio of 1:8 for 1 hour to make two substances Cross-linking reaction occurs to increase the functionality of chitosan and obtain a first-level cross-linked chitosan-ionic liquid solution (CTS-IL);

[0057] (2) Take 10g of the above-mentioned cross-linked chitosan-ionic liquid solution, and add polyethylene glycol according to the weight ratio of chitosan-ionic liquid solution to polyethylene glycol and epichlorohydrin at 20:1:1. 600 0.5g and epichlorohydrin 0.5g, mechanically stirred at 80°C for 4 hours to make pores and crosslink the product, so that the porosity of the product reaches 50%, and the degree of crosslinking increases to 60%. Secondary cross-linked chitosan-ionic liquid solution (CTS-IL);

[005...

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Abstract

The invention relates to an ionic liquid crosslinked chitosan modified zeolite adsorption material, a preparation method and application thereof. The preparation method includes: mixing and crosslinking chitosan and ionic liquid, then adding the crosslinked mixed liquid into liquid polyethylene glycol and epichlorohydrin to conduct secondary crosslinking, mixing the mixed liquid obtained by secondary crosslinking with zeolite powder, then adding the mixture dropwise into a sodium hydroxide solution to form sodium hydroxide solution-zeolite microspheres, and subjecting the microspheres to saponification, thus obtaining the adsorbent material. The preparation method provided by the invention has the advantages of simple process conditions, easy operation and low cost, the prepared adsorbent material has significant treatment effect on compound heavy metal ion wastewater, especially on anion and cation containing compound heavy metal ion wastewater.

Description

technical field [0001] The invention relates to an adsorption material for composite heavy metal ions, in particular to a zeolite adsorption material modified by ionic liquid cross-linked chitosan, which belongs to the technical field of environmental protection and composite materials. Background technique [0002] In recent years, the harm of heavy metal ions to humans has attracted widespread attention. Heavy metal ions are not only biologically toxic and refractory, but also migrate and transform with organisms, accumulate in organisms, and cause irreversible damage to organisms. In order to reduce the impact of heavy metal pollution on the environment and human health, some means must be used to remove heavy metal ions in water. In addition to chemical precipitation, membrane treatment, and advanced oxidation, adsorption, as a relatively effective method, is often used in the removal of heavy metal ions. [0003] Polymer adsorption materials can selectively adsorb spe...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/26B01J20/165B01J20/24B01J20/28021C02F1/28C02F1/281C02F1/286C02F2101/20
Inventor 任会学李炳瑾武道吉谭凤训于振宇任雪莹王杰
Owner SHANDONG JIANZHU UNIV
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