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Method for preparing flocculating agent by taking cesium triiodo-plumbate as initiator based on visible light polymerization

A cesium triiodide lead acid and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of side reactions, light source energy, etc. that are easy to cause harm to the human body, and achieve less side reactions, good social benefits and Economic benefits, the effect of stable response

Active Publication Date: 2021-10-19
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant prepared by this method is initiated by low-pressure ultraviolet light. Ultraviolet light is easy to cause damage to the human body and the energy of the light source is high, and side reactions may occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reaction bottle and continue to stir rapidly, controlling the mass ratio of chitosan to glacial acetic acid to be 1.5 : 1; after the chitosan is completely dissolved, a chitosan solution with a concentration of 4% is obtained.

[0027] 2) Weigh a certain amount of acrylamide and hexafluorobutyl methacrylate according to the mass ratio of acrylamide and hexafluorobutyl methacrylate as 2:1, stir rapidly in the reaction bottle until they are completely dissolved, and the total concentration is 28% solution. Add a certain amount of urea into the reaction bottle according to the ratio of urea to chitosan mass ratio of 2:1 and stir quickly until the two are completely dissolved.

[0028] 3) Add the initiator cesium triiodide leadate to the reaction bottle according to the ratio of cesium triiodide lead acid to chi...

Embodiment 2

[0031] 1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reaction bottle and continue to stir rapidly, controlling the mass ratio of chitosan to glacial acetic acid to be 2 : 1; after the chitosan is completely dissolved, a chitosan solution with a concentration of 4% is obtained.

[0032] 2) Weigh a certain amount of acrylamide and hexafluorobutyl methacrylate according to the mass ratio of acrylamide and hexafluorobutyl methacrylate as 3:1, stir rapidly in the reaction bottle until they are completely dissolved, and the total concentration is 24% solution. Add a certain amount of urea into the reaction bottle according to the ratio of urea to chitosan mass ratio of 2.1:1 and stir rapidly until the two are completely dissolved.

[0033] 3) Add the initiator cesium triiodide leadate to the reaction bottle according to the ratio of cesium triiodide lead acid to ch...

Embodiment 3

[0036] 1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reaction bottle and continue to stir rapidly, controlling the mass ratio of chitosan to glacial acetic acid to be 2 : 1; after the chitosan was completely dissolved, a chitosan solution with a concentration of 3.5% was obtained.

[0037] 2) Weigh a certain amount of acrylamide and hexafluorobutyl methacrylate according to the ratio of mass ratio of acrylamide to hexafluorobutyl methacrylate of 4:1, stir rapidly in the reaction bottle until completely dissolved, and the total concentration is 24.5% solution. Add a certain amount of urea into the reaction bottle according to the mass ratio of urea and chitosan of 2.2:1 and stir quickly until the two are completely dissolved.

[0038] 3) Add the initiator cesium triiodide leadate to the reaction bottle at a mass ratio of cesium triiodide leadate to chitosan of...

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Abstract

The invention discloses a method for preparing a flocculating agent based on cesium triiodate visible light initiation. The method comprises the following steps: taking chitosan and hexafluorobutyl methacrylate as raw materials, acrylamide as a cross-linking agent, urea as a cosolvent and triiodoplumbate cesium as an initiator; sequentially adding the three components into a reaction bottle, adding a proper amount of water, and fully and uniformly mixing and completely dissolving the three components under the condition of rapid stirring; adding urea, rapidly stirring, finally adding a cesium triiodo-plumbate 3 initiator, introducing nitrogen to remove oxygen, and uniformly stirring and mixing; finally, reacting the reaction bottle under visible light; and after the reaction is finished and aging is performed, extracting and purifying the product to obtain the modified chitosan-based flocculating agent. The preparation method disclosed by the invention is simple in process, high in production efficiency, relatively low in production cost, less in harm to a human body in an operation process, simple and convenient to operate and easy to control. The obtained modified chitosan-based flocculating agent is relatively good in water solubility, stable in performance and relatively strong in functionality, has a relatively good treatment effect on surface water containing heavy metals, soluble organic matters and the like, and has good social benefits and economic benefits in practical application.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a preparation method based on visible light polymerization and using cesium triiodide lead acid as an initiator flocculant. Background technique [0002] With the development of society, industry and agriculture, water pollution has attracted public attention. As a traditional process, coagulation and flocculation are widely used in water treatment. It is almost the key treatment process in river drinking water treatment, and it is often indispensable in domestic sewage tail water treatment, industrial wastewater pretreatment, and sludge concentration and dehydration in water treatment plants. After a long period of development, the relevant research in the field of flocculants has gradually formed a relatively comprehensive and perfect theoretical system. The performance of different types of flocculants in practical applications is closely related to their own proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/24C08F220/56C08F2/48C02F1/56
CPCC08F251/00C08F2/48C02F1/56C08F220/24C08F220/56Y02W10/37
Inventor 黄静唐晓旻
Owner CHONGQING TECH & BUSINESS UNIV
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