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Process for preparing shell glycan composite adsorbent

A composite adsorption and chitosan technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as ineffective removal of organic matter, and achieve the effects of fast adsorption rate, simple preparation process, and no secondary pollution.

Inactive Publication Date: 2006-01-25
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption of activated carbon on organic matter in water is affected by factors such as its own characteristics and the nature of organic matter in water, and cannot effectively remove organic matter in source water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Weigh 5g of chitosan, add about 50ml of 2% acetic acid solution to it until the chitosan is completely dissolved. Add activated carbon powder according to the mass ratio of chitosan: powdered activated carbon=1:9, stir at high speed to make the solution uniform.

[0025] 2. Add 25% glutaraldehyde solution to the above solution according to the ratio of glutaraldehyde: chitosan=0.5mL / g, after fully stirring, add dropwise sodium hydroxide solution to adjust the pH of the solution to be 8 or 8.2 or 8.4 or 8.6 or 8.8. The solution is placed in an electric constant temperature water bath, and the constant temperature crosslinking reaction is carried out at 40° C. for 3 hours, so that the raw materials are condensed into small balls with a diameter of 1 mm to 3 mm.

[0026] 3. After the cross-linking reaction, the solid-liquid separation of the raw materials is carried out, and the separated solid is washed to neutrality. After drying at 80°C for 8 hours, it is ground wit...

Embodiment 2

[0029] 1. Weigh 5g of chitosan, add about 50ml of 2% acetic acid solution to it until the chitosan is completely dissolved. Add activated carbon powder according to the mass ratio of chitosan: powdered activated carbon=2:8, stir at high speed to make the solution uniform.

[0030] 2. Add 25% glutaraldehyde solution to the above solution according to the ratio of glutaraldehyde: chitosan = 1mL / g, stir well and add dropwise sodium hydroxide solution to adjust the pH value of the solution to 8.1 or 8.3 or 8.5 or 8.7 Or 8.9 or 9. The solution is placed in an electric heating constant temperature water bath, and the constant temperature crosslinking reaction is carried out at 65° C. for 3 hours, so that the raw materials are condensed into small balls with a diameter of 1 mm to 3 mm.

[0031] 3. After the cross-linking reaction, the solid-liquid separation of the raw materials is carried out, and the separated solid is washed to neutrality, dried at 79 or 81°C for 8 hours, and gro...

Embodiment 3

[0034] 1. Weigh 5g of chitosan, add about 50ml of 2% acetic acid solution to it until the chitosan is completely dissolved. Add activated carbon powder according to the mass ratio of chitosan: powdered activated carbon=3:7, stir at high speed to make the solution uniform.

[0035] 2. According to the ratio of glutaraldehyde: chitosan=2mL / g, add 25% glutaraldehyde solution to the above solution, stir well, add dropwise sodium hydroxide solution to adjust the pH value of the solution between 8-9. The solution is placed in an electric heating constant temperature water bath, and the constant temperature crosslinking reaction is carried out at 80° C. for 3 hours, so that the raw materials are condensed into small balls with a diameter of 1 mm to 3 mm.

[0036] 3. After the cross-linking reaction, the solid-liquid separation of the raw materials is carried out, and the separated solid is washed to neutrality. After drying at 80°C for 8 hours, it is ground with a mortar, and the obt...

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Abstract

A composite adsorbent is prepared from chitosan through dissolving it in the solution of acetic acid, proportionally adding activated carbon powder, adding glutaraldehyde solution, regulating pH value, cross-linking reacting in warm water bath, solid-liquid separation, washing and baking the solid, grinding and sieving. Its advantage is high adsorption and adsorbing speed.

Description

technical field [0001] The invention relates to the technical field of water treatment adsorption, in particular to a preparation method of a chitosan composite agent and the application of the chitosan composite adsorbent in water treatment. Background technique [0002] In the face of increasing water pollution, the traditional four-stage coagulation-sedimentation-filtration-disinfection water treatment process can remove a small part of organic matter (including chroma) in addition to removing impurity particles and turbidity. However, to further increase the removal rate of organic matter, advanced treatment facilities including activated carbon adsorption, biodegradation and other processes must be adopted. [0003] Adsorption is a surface phenomenon, that is, the surface adsorption of solids on organic compounds in water. Surface adsorption is generally divided into two types: physical adsorption and chemical adsorption. In the actual adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24
Inventor 张敬东邓永华张芳
Owner WUHAN UNIV
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