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A kind of preparation method of chitosan modified down powder anionic dye adsorbent

An anionic dye, chitosan technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of poor adsorption effect, high price, large dosage, etc. The effect of low cost and high adsorption capacity

Active Publication Date: 2018-06-15
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to the adsorption method is the selection of the adsorbent. Natural waste and industrial waste have the characteristics of low cost as adsorption materials, but their adsorption effect is not good and the dosage is too large; activated carbon and its resin adsorbent have large adsorption capacity, but the price and higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Alkali treatment of down powder

[0023] Add 10g of down powder into 150mL of pH 10 alkali solution, treat it at 80°C for 180min, pickle, wash with water until neutral, then filter and dry naturally.

[0024] 2) Preparation of chitosan solution

[0025] Chitosan was dissolved in 2% acetic acid solution by volume to obtain a chitosan solution with a concentration of 1% by mass.

[0026] 3) chitosan modified waste down powder

[0027] Get the down powder after 5g alkali treatment, join in 150mL water, join the chitosan solution of 20mL 1% in the down powder dispersion liquid, then add 0.1g glutaraldehyde (50%), under 40 ℃, react After 60 minutes, the product was filtered through a sieve.

[0028] 4) Protonization treatment

[0029] Chitosan-modified down powder was protonated in 0.5 mol / L hydrochloric acid solution at room temperature for 60 minutes, washed with water until neutral, and dried to obtain the desired adsorbent product.

[0030] Adsorption experiment ...

Embodiment 2

[0034] 1) Alkali treatment of down powder

[0035] Add 10g of down powder into 200mL of lye with pH 11, treat at 70°C for 120min, pickle with water, wash with water until neutral, then filter and dry naturally.

[0036] 2) Preparation of chitosan solution

[0037] Chitosan was dissolved in 3% acetic acid solution by volume to obtain a chitosan solution with a mass percent concentration of 2%.

[0038] 3) Chitosan modified down powder

[0039] Get 5g of alkali-treated down powder, add it to 200mL water, add 15mL of 2% chitosan solution to the down powder dispersion, then add 0.2g glutaraldehyde (50%), and react for 50min at 45°C , and the product was filtered through a sieve.

[0040] 4) Protonization treatment

[0041] Chitosan-modified down powder was protonated in a hydrochloric acid solution with a concentration of 1 mol / L for 90 min at room temperature, washed with water until neutral, and dried to obtain the desired adsorbent product.

[0042] Adsorption experiment ...

Embodiment 3

[0046] 1) Alkali treatment of down powder

[0047] Add 10g of down powder into 250mL of pH 12 lye, treat at 60°C for 90min, pickle, wash with water until neutral, filter and dry naturally.

[0048] 2) Preparation of chitosan solution

[0049] Chitosan was dissolved in 4% acetic acid solution by volume to obtain a chitosan solution with a mass percent concentration of 2.5%.

[0050] 3) Chitosan modified down powder

[0051] Get the down powder after 5g alkali treatment, join in 250mL water, join the chitosan solution of 15mL 2.5% in the down powder dispersion liquid, then add 0.25g glutaraldehyde (50%), under 50 ℃, react After 40 minutes, the product was filtered through a sieve.

[0052] 4) Protonization treatment

[0053] Chitosan-modified down powder was protonated in 1.5 mol / L hydrochloric acid solution for 100 min at room temperature, washed with water until neutral, and dried to obtain the desired adsorbent product.

[0054] Adsorption experiment

[0055] Under norm...

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Abstract

The invention discloses a preparation method of a chitosan modified down-powder anion dye adsorbent, and relates to preparation and application methods of the dye adsorbent. The preparation method comprises the steps that abandoned down-powder is subjected to alkali treatment, a surface oil layer is removed, a high molecular protein structure of the abandoned down-powder is destroyed, glutaraldehyde serves as a cross-linking agent, grafting and modifying are conducted through the chitosan, and a biomass adsorption material which has a good adsorption property on anionic dye is obtained. The prepared adsorbent contains a large number of polar groups of amidogen, hydroxyl and the like and has the good adsorption property on the anionic dye. According to the adsorbent, the preparation process is simple, the raw materials are wide in source, low in price, the abandoned down-powder is used for dye wastewater adsorption treatment, the situation that waste is used for controlling pollution is achieved, and a good practical application value is achieved.

Description

technical field [0001] The invention relates to a preparation method of an anionic dye adsorbent, in particular to a preparation method of a chitosan-modified down powder anionic dye adsorbent. Background technique [0002] Dyes are a class of chemicals that are closely related to people's lives. Coloring substances can be seen everywhere. With the development of dyes and printing and dyeing industries, the number of dyes continues to increase. In the process of its production and use, about 10-20% of dyes are more than Discharge into the environment in the form of wastewater. The dyes that enter the water body affect the photosynthesis of aquatic plants, and once they enter the human body, they can cause cancer, teratogenicity, mutagenesis, and endanger health. Due to the complex and extremely stable dye molecular structure, conventional flocculation, precipitation, membrane filtration, oxidation, photodegradation and other methods have certain limitations. The adsorption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J2220/4812C02F1/286C02F2101/308C02F2103/30
Inventor 贺宝元薛海燕仇旭东
Owner SHAANXI UNIV OF SCI & TECH