Chitosan composite gel water purifying agent and preparation method thereof

A technology of composite gel and chitosan, applied in the direction of adsorption water/sewage treatment, etc., to achieve the effect of high removal rate, excellent physical and chemical properties, and environmental friendliness

Active Publication Date: 2011-02-23
ZHEJIANG ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the increasing pollution of environmental endocrine disrupting substances, the traditional four-stage water treatment process of coagulation-sedimentation-filtration-disinfection can no longer cope with the current water pollution problem

Method used

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  • Chitosan composite gel water purifying agent and preparation method thereof
  • Chitosan composite gel water purifying agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Weigh 3g of chitosan (with a degree of deacetylation of 99%), add 100ml of acetic acid aqueous solution with a volume percentage of 3% to it, until the chitosan is completely dissolved, and a chitosan solution with a pH of 5 is obtained , Adding cellulose in a mass ratio of chitosan:cellulose=1:1.5, stirring at 500 rpm for 3 hours to dissolve the cellulose to obtain a solution.

[0033] (2) Add silica gel to the solution of step (1) according to the mass ratio of chitosan: silica gel (particle size: 50 mesh) = 1:2, stir at 800 rpm for 1 hour to uniformly disperse the silica gel to obtain a dispersion .

[0034] (3) Add activated carbon with a particle size of 80 mesh to the dispersion of step (2) according to the mass ratio of chitosan: activated carbon=1:3.5, and stir at 500 rpm for 4 hours until a uniform black gel is obtained. The chitosan composite gel water purifier has a dynamic viscosity of 10000mpa·S at 25°C.

[0035] The above-mentioned chitosan composite gel wa...

Embodiment 2

[0038] (1) Weigh 5g of chitosan (with a degree of deacetylation of 98%), add 100ml of an acetic acid aqueous solution with a volume percentage of 4% to it, until the chitosan is completely dissolved, and a chitosan solution with a pH of 6 is obtained Add cellulose according to the mass ratio of chitosan:cellulose=1:2, and stir for 2 hours at 600 rpm to dissolve the cellulose to obtain a solution.

[0039] (2) Add silica gel to the solution of step (1) according to the mass ratio of chitosan: silica gel (particle size is 80 mesh) = 1:3, stir at 700 revolutions / min for 1.5 hours to uniformly disperse the silica gel to obtain a dispersion .

[0040] (3) Add activated carbon with a particle size of 100 mesh to the dispersion of step (2) according to the mass ratio of chitosan: activated carbon = 1:5, and stir at 500 rpm for 3 hours until a uniform black gel is obtained. The chitosan composite gel water purifier has a dynamic viscosity of 6500mpa·S at 25°C.

[0041] Add the above-mentio...

Embodiment 3

[0044] (1) Weigh 7g of chitosan (the degree of deacetylation is 91%), add 100ml of 5% acetic acid aqueous solution to it, until all the chitosan is dissolved, and obtain a chitosan solution with a pH of 5.5 Add cellulose according to the mass ratio of chitosan:cellulose=1:2.5, and stir at 800 revolutions / min for 1 hour to dissolve the cellulose to obtain a solution.

[0045] (2) Add silica gel to the solution of step (1) according to the mass ratio of chitosan: silica gel (particle size 60 mesh) = 1:3.5.5, stir at 500 rpm for 2 hours to make the silica gel uniformly dispersed, and obtain Dispersions.

[0046] (3) Add activated carbon with a particle size of 120 mesh to the dispersion of step (2) according to the mass ratio of chitosan: activated carbon = 1:4, and stir at 800 rpm for 1 hour until a uniform black gel is obtained. The chitosan composite gel water purifier has a dynamic viscosity of 5000mpa·S at 25°C.

[0047] The above chitosan composite gel water purifying agent was ...

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Abstract

The invention discloses a chitosan composite gel water purifying agent, which is gel prepared from solution of chitosan, cellulose, silica gel and activated carbon according to the mass ratio of 1:1-2.5:2-3.5:3-5. The invention also discloses a method for preparing the chitosan composite gel water purifying agent, which comprises the following steps of: adding the cellulose, the silica gel and the activated carbon into the solution of chitosan in turn; fully stirring at a high speed until black and homogeneous semifluid gel is formed, and obtaining the chitosan composite gel water purifying agent. The water purifying agent is natural and nontoxic, has functions of high-efficiency adsorption and flocculation, can be used for deep purification of an underwater environment polluted by endocrine disruptors and also can be used for emergency treatment in public health water pollution emergency. Meanwhile, the preparation method makes operation simple, reduces cost and is environmentally-friendly and suitable for industrial production.

Description

Technical field [0001] The invention relates to the field of water purifying agents, in particular to a chitosan composite gel water purifying agent and a preparation method thereof. Background technique [0002] In recent years, extensive investigations and studies have been carried out on the endocrine disrupting activity of environmental chemicals. A large number of animal epidemiological data show that many environmental chemicals can interfere with the endocrine function of animals, and clinically they are characterized by reproductive disorders, birth defects, developmental abnormalities, metabolic disorders and certain cancers. Human epidemiological studies have shown that human reproductive disorders, developmental abnormalities, and certain cancers such as breast cancer, testicular cancer, and ovarian cancer are related to endocrine interference. There are hundreds of chemicals that have been proven to be endocrine disruptors. The 1998 survey of water pollutants in Jap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 吴南翔毕忆群谭玉凤房国坚蒋玉燕
Owner ZHEJIANG ACAD OF MEDICAL SCI
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