Preparation method of amino modified chitosan composite adsorbing material

A composite adsorption material, amino modification technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost, secondary pollution, large consumption, etc. Achieve high mechanical strength, good adsorption effect and good chemical stability

Active Publication Date: 2017-01-04
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, activated carbon adsorption has become the most widely used dye wastewater treatment technology due to its simple method, simple operation and high removal efficiency, but its further development and application are limited by large consumption, high cost and secondary pollution caused by regeneration.

Method used

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  • Preparation method of amino modified chitosan composite adsorbing material
  • Preparation method of amino modified chitosan composite adsorbing material
  • Preparation method of amino modified chitosan composite adsorbing material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of amino-modified chitosan composite adsorption material of the present invention, comprises the steps:

[0025] Step 1, weigh 9g of attapulgite, activated carbon and ferric oxide powder with a mass ratio of 1:6:3, add them to 350mL deionized water, and use 40w ultrasonic treatment for 30min;

[0026] Step 2, after adding the suspension solution obtained by ultrasound into 9g chitosan powder, then add 3mL acetic acid solution to the mixed material, stir in a water bath at 40°C (the stirring blade is made of wood material) for 6h to form a uniform colloid;

[0027] Step 3, while stirring, use an automatic injector to drop 20mL of the amino solution into the uniform colloid at a speed of 50mL / h, wherein the amino solution is a mixed solution of triethylenetetramine and deionized water with a volume ratio of 10:90, and the stirring speed The control is 150rpm; the ratio of the amino solution is different, and the number of amino groups that can be gr...

Embodiment 2

[0030] The preparation method of amino-modified chitosan composite adsorption material of the present invention, comprises the steps:

[0031] Step 1, weigh 9g of attapulgite, activated carbon and ferric oxide powder with a mass ratio of 2:4:3 and add them to 350mL of deionized water, and use 60w ultrasonic treatment for 30min;

[0032] Step 2, after adding the suspension solution obtained by ultrasound into 9g chitosan powder, then add 4mL acetic acid solution to the mixed material, stir in a water bath at 45°C (the stirring blade is made of wood material) for 3h to form a uniform colloid;

[0033] Step 3, while stirring, use an automatic injector to drop 30mL of the amino solution into the homogeneous colloid at a speed of 80mL / h, wherein the amino solution is a mixed solution of triethylenetetramine and deionized water with a volume ratio of 20:80, and stir Speed ​​control is 120rpm;

[0034] Step 4, control the temperature of the water bath to 70°C and continue to stir fo...

Embodiment 3

[0036] The preparation method of amino-modified chitosan composite adsorption material of the present invention, comprises the steps:

[0037] Step 1, weigh 9g of attapulgite, activated carbon and ferric oxide powder with a mass ratio of 3:3:3 and add it to 350mL of deionized water, and use 70w ultrasonic treatment for 30min;

[0038] Step 2, after adding the suspension solution obtained by ultrasound into 9g chitosan powder, then add 4mL acetic acid solution to the mixed material, stir in a water bath at 50°C (the stirring blade is made of wood material) for 5h to form a uniform colloid;

[0039] Step 3, while stirring, use an automatic injector to drop 40mL of the amino solution into the uniform colloid at a speed of 60mL / h, wherein the amino solution is a mixed solution of triethylenetetramine and deionized water with a volume ratio of 30:70, and stir Speed ​​control is 100rpm;

[0040] Step 4, control the temperature of the water bath to 60°C and continue stirring for 2 h...

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Abstract

The invention discloses a preparation method of an amino modified chitosan composite adsorbing material. According to the preparation method, chitosan, activated carbon, attapulgite and ferroferric oxide serve as raw materials, a triethylene tetramine modified composite material is adopted, and the prepared composite adsorbing material has the advantages of being good in chemical stability, high in mechanical strength, good in adsorption effect and easy to recycle; compared with similar adsorbents, the prepared composite adsorbing material is better in adsorption effect, and the adsorption capacity of the adsorbing material to reactive brilliant red can reach 166 mg / g under the acidic condition and is 2 times that of an activated carbon adsorbent.

Description

technical field [0001] The invention relates to a preparation method of an amino-modified chitosan composite adsorption material, which belongs to the technical field of preparation of adsorbent materials Background technique [0002] Printing and dyeing wastewater is an important part of industrial wastewater. With the rapid development of printing and dyeing textile industry, printing and dyeing wastewater has become one of the key pollution sources of water environment. With the increasing number and variety of dyes used in the printing and dyeing industry, and the continuous changes in the printing and dyeing process and product structure, the water quality of printing and dyeing wastewater has undergone great changes. Printing and dyeing wastewater has the characteristics of high concentration of organic matter, high chroma and rich color, and poor biodegradability. At present, the methods for treating dye wastewater mainly include activated carbon adsorption, electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/06B01J20/12B01J20/20B01J20/24B01J2220/46B01J2220/4806B01J2220/4812B01J2220/4825C02F1/28C02F1/281C02F1/286C02F2101/308
Inventor 冯骞于阳阳刘晓辉钟天意杨雯忻亥笑薛朝霞方芳操家顺周仕华吴园园孙良玉
Owner HOHAI UNIV
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