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Chitosan composite gel water purifying agent, preparation method and uses thereof

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

Active Publication Date: 2012-06-06
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, preparation method and uses thereof
  • Chitosan composite gel water purifying agent, preparation method and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) take by weighing 3g chitosan (degree of deacetylation is 99%), add the acetic acid aqueous solution 100ml that volume percentage concentration is 3% wherein, all dissolve to chitosan, obtain the chitosan solution that pH value is 5 , add cellulose according to the mass ratio of chitosan: cellulose=1: 1.5, stir with 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 is 50 orders)=1:2, stir 1 hour with 800 rev / min to make silica gel evenly disperse, obtain dispersion liquid .

[0034] (3) according to chitosan: the mass ratio of activated carbon=1: 3.5 in the dispersion liquid of step (2), adding granularity is 80 mesh activated carbons, stirs with 500 rev / mins for 4 hours until uniform black gel is made, obtains The chitosan composite gel water purifier has a dynamic viscosity of 10000mpa·S at 25°C.

[0035] Above-mentioned chi...

Embodiment 2

[0038] (1) take by weighing 5g chitosan (degree of deacetylation is 98%), add volume percentage concentration wherein to be 100ml of acetic acid aqueous solution of 4%, all dissolve to chitosan, obtain the chitosan solution that pH value is 6 , add cellulose according to the mass ratio of chitosan: cellulose=1: 2, stir with 600 rpm for 2 hours 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 1.5 hours with 700 rev / min to make silica gel evenly disperse, obtain dispersion liquid .

[0040] (3) according to chitosan: the mass ratio of activated carbon=1: 5, in the dispersion liquid of step (2), adding particle size is 100 mesh activated carbons, stirs 3 hours until making uniform black gel with 500 rev / mins, obtains The chitosan composite gel water purifier has a dynamic viscosity of 6500mpa·S at 25°C.

[0041] The above-mentioned chitos...

Embodiment 3

[0044] (1) Take 7g chitosan (degree of deacetylation is 91%), add volume percent concentration wherein 100ml of acetic acid aqueous solution of 5%, to chitosan all dissolve, obtain the chitosan solution that pH value is 5.5 , add cellulose according to the mass ratio of chitosan: cellulose=1: 2.5, stir with 800 rpm 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 is 60 mesh)=1: 3.5, stir 2 hours with 500 rev / min to make silica gel evenly disperse, obtain dispersion liquid .

[0046] (3) according to chitosan: the mass ratio of activated carbon=1: 4, in the dispersion liquid of step (2), adding granularity is 120 purpose activated carbons, stirs 1 hour until making uniform black gel with 800 rev / mins, obtains Chitosan composite gel water purifier, dynamic viscosity at 25°C is 5000mpa·S.

[0047] Above-mentioned chitosan composite gel water purif...

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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 purifiers, in particular to a chitosan composite gel water purifier and its preparation method and application. Background technique [0002] In recent years, extensive investigation and research have been carried out abroad 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, which are clinically characterized by reproductive disorders, birth defects, abnormal development, metabolic disorders and some cancers. Human epidemiological studies have shown that human reproductive disorders, abnormal development, and certain cancers such as breast cancer, testicular cancer, and ovarian cancer are related to endocrine disruption. Hundreds of chemicals have been identified as endocrine disruptors. A survey of water pollutants in Japan in 1998 showed that water mainly...

Claims

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Application Information

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Patent Type & Authority Patents(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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