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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 conductivity, and did not study the difference and effect of zeolite on the adsorption of different heavy metal ions in complex metal ion coexistence systems. conduct a comparative study

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

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Effect test

Embodiment 1

[0043] The preparation method of the zeolite adsorption material modified by ionic liquid cross-linked chitosan:

[0044] (1) Get chitosan (acetylation ≥ 95%) 10g, mix with functionalized ionic liquid chloride 1-hydroxyethyl-3-methylimidazole 50g according to the weight ratio of 1:5 and carry out stirring reaction for 1 hour, make Its second material crosslinking reaction occurs, improves the functionality of chitosan, obtains chitosan-ionic liquid solution (CTS-IL) of primary crosslinking;

[0045] (2) Take above-mentioned primary cross-linked chitosan-ionic liquid solution 10g, according to the weight ratio of chitosan-ionic liquid solution and polyethylene glycol and epichlorohydrin is 20:1:1, add liquid polysaccharide respectively Ethylene glycol PEG600 0.5g and epichlorohydrin 0.5g, under the condition of 80 ℃, mechanically stirred for 4 hours, and the product was pore-formed and cross-linked, so that the porosity of the product reached 50%, and the degree of cross-linkin...

Embodiment 2

[0049] The preparation method of the zeolite adsorption material modified by ionic liquid cross-linked chitosan:

[0050] (1) Take 10 g of chitosan (acetylation ≥ 95%), mix it with 30 g of functionalized ionic liquid 1-carboxymethyl-3-methylimidazolium hexafluorophosphate according to the weight ratio of 1:3 and carry out stirring reaction for 1 hour , so that the two substances undergo a cross-linking reaction, improve the functionality of chitosan, and obtain a primary cross-linked chitosan-ionic liquid solution (CTS-IL);

[0051] (2) According to the weight ratio of chitosan-ionic liquid solution and polyethylene glycol is 25:1, according to the weight ratio of chitosan-ionic liquid solution and epichlorohydrin is 25:1, take the above-mentioned crosslinked shell Polysaccharide-ionic liquid solution 10g, add liquid polyethylene glycol PEG600 0.4g, add epichlorohydrin 0.4g, under the condition of 80 ℃, mechanically stir for 4 hours, carry out pore-forming and cross-linking to...

Embodiment 3

[0055] The preparation method of the zeolite adsorption material modified by ionic liquid cross-linked chitosan:

[0056] (1) Get chitosan (acetylation ≥ 95%) 10g, carry out mixing and stirring reaction with functionalized ionic liquid N-sulfonic acid butylpyridine bisulfate 80g according to the weight ratio of 1:8 for 1 hour, so that the two substances A cross-linking reaction occurs to increase the functionality of chitosan to obtain a primary cross-linked chitosan-ionic liquid solution (CTS-IL);

[0057] (2) Get above-mentioned cross-linked chitosan-ionic liquid solution 10g, be 20:1:1 according to the weight ratio of chitosan-ionic liquid solution and polyethylene glycol and epichlorohydrin, add polyethylene glycol respectively 600 0.5g and epichlorohydrin 0.5g, under the condition of 80 ℃, mechanically stirred for 4 hours, the product was carried out pore making and crosslinking, the porosity of the product was made to reach 50%, and the degree of crosslinking was increas...

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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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