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Method for preparing particles by taking chitosan/ perlite as raw materials

A technology of chitosan and perlite is applied in the field of preparing granular materials suitable for water treatment, and can solve the problems of easy loss and unstable properties.

Active Publication Date: 2015-02-11
BEIJING ZHONGDI HONGKE ENVIRONMENT SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan generally exists in the form of powder or flakes, which is unstable and easy to lose

Method used

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  • Method for preparing particles by taking chitosan/ perlite as raw materials

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] Such as figure 1 As shown, firstly mix chitosan and 4% glacial acetic acid solution at a ratio of 1:25 (g / ml) in (2), and fully stir in a water bath environment at a temperature of 40-50°C , continue to stir for 2 hours, then slowly add 100-mesh perlite powder (the ratio of its mass to chitosan is 2:1) into (2), continue to stir for 4 hours, and the mixed solution is dripped into the concentration through a peristaltic pump. In the 0.3mol / L sodium hydroxide solution (5), granular substances are formed, and then the granular substances are fully washed with deionized water until neutral, and dried at 50°C.

[0026] The above product is used to remove a solution with a fluoride ion concentration of 10mg / L. The ambient temperature is 25°C, the pH is 7, and the oscillation speed is 150rpm. After reaching equilibrium, the fluoride ion removal rate can reach 81%.

specific Embodiment 2

[0027] Such as figure 1 As shown, firstly mix chitosan and glacial acetic acid solution with a concentration of 4% in the ratio of 1:25 (g / ml) in (2), and fully stir in a water bath environment with a temperature of 40-50°C , continue to stir for 2 hours, then slowly add 100-mesh perlite powder (the ratio of its mass to chitosan is 2:1) into (2), continue to stir for 4 hours, and the mixed solution is dripped drop by drop through a peristaltic pump to the concentration In the 0.3mol / L sodium hydroxide solution (5), granular substances are formed, and then the granular substances are fully washed with deionized water until neutral, and dried at 50°C.

[0028] The above product is used to remove a solution with a Cu ion concentration of 200mg / L, the ambient temperature is 25°C, the pH is 5, the oscillation speed is 200rpm, and the equilibrium can be reached in 3 hours, and the adsorption capacity of the adsorbent can reach 55.1mg / g.

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Abstract

The invention discloses a method for preparing particles by taking chitosan / perlite as raw materials. The method comprises the following steps of: fully mixing the chitosan and a 4% glacial acetic acid solution in a mixing device in ratio of 1g to 25mg, and continuously stirring for 2h under a 40-50 DEG C water bath environment; then slowly adding the perlite to the mixing device in a mass ratio of the perlite to the chitosan being 2: 1, and continuously stirring for 4h; dropwise adding the mixed solution into a sodium hydroxide solution with the concentration of 0.3mol / L by using a peristaltic pump to form particulate matters; and finally, fully washing the particulate matters by using deionized water till the deionized water for washing is neutral, and drying at 50 DEG C. The particulate materials with stability performance can be formed.

Description

technical field [0001] The invention relates to a method for preparing granular materials suitable for water treatment, in particular to a method for preparing particles with chitosan / perlite as raw materials. Background technique [0002] Chitosan is obtained by deacetylation of widely existing chitin, and its chemical name is polyglucosamine (1-4)-2-amino-B-D glucose. Chitin widely exists in the cells of lower plant fungi and algae in nature, the shells of crustaceans such as shrimp, crab, and insects, and the cell walls of higher plants. Chitin is the second largest organic resource, therefore, the source of chitosan is quite extensive. [0003] Chitosan has a large number of functional groups such as amino groups and hydroxyl groups. These functional groups can play specific roles and can play a full role in processing. However, chitosan generally exists in the form of powder or flakes, which is unstable and easy to lose. Contents of the invention [0004] The purpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08L5/08C08K3/34
Inventor 张国臣张焕祯刘晓宇于晓娟李孝梅马莉宁亚涛李雅静彭丽霞郭迎涛
Owner BEIJING ZHONGDI HONGKE ENVIRONMENT SCI & TECH