Preparation of magnetic chitosan composite adsorption material and application in dye wastewater treatment

A composite adsorption material, chitosan technology, applied in the preparation of magnetic chitosan composite materials, the preparation of magnetic chitosan composite adsorption materials, can solve the problems of difficult separation and degradation, low adsorption capacity, poor adsorption effect, etc. Achieve the effect of good adsorption effect, large adsorption capacity and easy separation

Inactive Publication Date: 2017-04-26
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of anionic dye that has good adsorption effect for anionic dyes, and aims at problems such as low adsorption capacity of natural chitosan in the trea

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  • Preparation of magnetic chitosan composite adsorption material and application in dye wastewater treatment
  • Preparation of magnetic chitosan composite adsorption material and application in dye wastewater treatment
  • Preparation of magnetic chitosan composite adsorption material and application in dye wastewater treatment

Examples

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[0043] Example 1

[0044] (1) Preparation of ferroferromagnetic nanoparticles: FeCl 2 4H 2 O and FeCl 3 ·6H 2 O by nFe 2+ / nFe 3+ Dissolve in distilled water at a ratio of 1:1, stir at 50°C, and add 15mL of ammonia water (25%) quickly dropwise to the above solution after nitrogen gas flow, react for 30min, wash, and dry to obtain ferroferric oxide magnetic nanoparticles;

[0045] (2) Preparation of silicon dioxide-ferric oxide composite: disperse 0.5 g of ferric oxide nanoparticles into a mixture of 50 mL of absolute ethanol and 50 mL of distilled water by ultrasonication for 30 min, add 1 mL of tetraethyl orthosilicate solution, 1mL ammonia solution (15%), react for 10h, wash and dry to obtain the silica-ferric oxide complex;

[0046] (3) Preparation of magnetic chitosan composite adsorption material: Dissolve 1g chitosan in 100mL acetic acid solution (0.5 wt.%), add 1g silica-ferric oxide complex, stir well; then slowly add 1mL glutaraldehyde produces a black gel-like...

Example Embodiment

[0047] Example 2

[0048] (1) Preparation of ferroferromagnetic nanoparticles: same as in Example 1;

[0049] (2) Preparation of silica-ferric oxide composite: disperse 0.5 g ferric oxide particle ultrasonically for 30 min in a mixture of 75 mL absolute ethanol and 25 mL distilled water, add 1.5 mL ethyl orthosilicate solution , 2.3mL ammonia solution (20%), reacted for 24h, washed and dried to obtain the silica-ferric oxide complex;

[0050] (3) Preparation of magnetic chitosan composite adsorption material: Dissolve 1.5g chitosan in 150mL acetic acid solution (1 wt.%), add 1 g silica-ferric oxide complex, stir well; slowly Add 3mL of glutaraldehyde to produce a black gel-like substance—magnetic chitosan; then disperse 1g of magnetic chitosan in 50mL of distilled water, add 0.5g of 2,3-epoxypropyltrimethylammonium chloride , and reacted at 80°C for 12h; after the reaction was completed, it was washed with distilled water and absolute ethanol in turn to obtain the product ma...

Example Embodiment

[0051] Example 3

[0052] (1) Preparation of ferroferromagnetic nanoparticles: same as in Example 1;

[0053] (2) Preparation of silicon dioxide-ferric oxide composite: disperse 0.5 g of ferric oxide nanoparticles into a mixture of 80 mL of absolute ethanol and 20 mL of distilled water by ultrasonication for 30 min, add 2 mL of tetraethyl orthosilicate solution, 4mL of ammonia solution (25%), reacted for 12h, washed and dried to obtain the silica-ferric oxide complex;

[0054] (3) Preparation of magnetic chitosan composite adsorption material: Dissolve 2g chitosan in 200mL acetic acid solution (1 wt.%), add 1g silica-ferric oxide complex, stir well and slowly add 6mL Glutaraldehyde produces a black gel-like substance—magnetic chitosan; then 1g of magnetic chitosan is dispersed in 50mL of distilled water, and 1g of 2,3-epoxypropyltrimethylammonium chloride is added, at 60 It was reacted at ℃ for 24 h; after the reaction, it was washed with distilled water and absolute ethanol...

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Abstract

The invention discloses a preparation method of a magnetic chitosan composite adsorption material. The preparation method of the magnetic chitosan composite adsorption material comprises the steps that ferriferrous oxide magnetic nanoparticles are prepared through a chemical coprecipitation method, silicon dioxide wraps the surface of ferriferrous oxide through a hydrolysis reaction of tetraethyl orthosilicate, glutaraldehyde serves as a cross-linking agent to enable chitosan and ferriferrous oxide wrapped by silicon dioxide to generate a cross-linking reaction to obtain magnetic chitosan, and finally the magnetic chitosan composite adsorption material is obtained by modifying the magnetic chitosan through quaternary ammonium salt. The composite material has the excellent dispersibility, thermostability and weak magnetism, the composite material has the advantages of being high in adsorption capacity, good in adsorption effect, high in adsorption speed, easy to separate and the like to anionic dye in wastewater, and the composite material has a good application prospect in wastewater treatment of the anionic dye.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a preparation method of a magnetic chitosan composite adsorption material, in particular to a preparation of a magnetic chitosan composite material modified with a quaternary ammonium salt; the invention also relates to the magnetic shell Adsorption properties of polysaccharide composite adsorbents and their application in the treatment of methyl orange in dye wastewater. Background technique [0002] Water is an important natural resource needed by human beings. In recent years, the discharge of industrial wastewater has caused water pollution, especially the pollution of dye wastewater has become increasingly serious. Dye wastewater is wastewater discharged from printing and dyeing factories that mainly process cotton, hemp, chemical fibers and their blended products. Textile printing and dyeing wastewater has the characteristics of large water volume, high content...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/30C02F103/30
CPCB01J20/24B01J20/28009C02F1/286C02F2101/308C02F2103/30
Inventor 杨武周容平郭昊巩莉艾洁冰
Owner NORTHWEST NORMAL UNIVERSITY
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