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High adsorption performance composite flocculant aerogel and preparation method thereof

A composite flocculant and high adsorption technology, applied in the field of material science, can solve the problems of harmful human health and ecological environment, large amount of flocculant, limited adsorption capacity, etc., to achieve the effects of easy penetration, high adsorption efficiency, and easy operation.

Active Publication Date: 2015-07-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a composite flocculant aerogel with high adsorption performance aiming at the disadvantages of traditional flocculants that are harmful to human health and ecological environment, limited adsorption capacity, large amount of flocculant, and poor flocculation ability. Flocculant airgel has the characteristics of less dosage, less scum output, strong flocculation ability, good effect, and easy removal after adsorption

Method used

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  • High adsorption performance composite flocculant aerogel and preparation method thereof
  • High adsorption performance composite flocculant aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, dissolve 2 g of anionic polyacrylamide in deionized water to prepare a dilute solution with a mass fraction of 0.5%, then add 0.5 g of graphene oxide into it, and after slight stirring, let it stand for 24 hours to form a suspended polyacrylamide / graphene oxide colloidal floc; Next, the prepared mixture is irradiated by microwave ovens (brand: Haier; model: MW-2070M; firepower: medium fire) for a short period of 10 seconds, and then filter to remove the raffinate. Put the colloidal floc into a sealed bag and freeze in the refrigerator for 24 hours; finally put the frozen mixture into a vacuum freeze dryer (model: FD-1-50; vacuum degree: 10Pa; cold trap coil temperature: -50 ℃) after drying, the flocculant composite graphene oxide airgel is obtained, wherein the graphene oxide content is 20%.

[0028] When 25 mg of flocculant-composite graphene oxide airgel obtained by the above method was added to 50 mL of basic fuchsin solution with a concentration of 400 mg / L,...

Embodiment 2

[0030] First, dissolve 2 g of anionic polyacrylamide in deionized water to prepare a dilute solution with a mass fraction of 0.75%, then add 0.25 g of graphene oxide into it, and after slight stirring, let it stand for 24 hours to form a suspended polyacrylamide / graphene oxide colloidal floc; Next, the prepared mixture is irradiated by microwave ovens (brand: Haier; model: MW-2070M; firepower: medium fire) for a relatively short period of time for 5 seconds, and then filter and remove the raffinate. Put the colloidal floc into a sealed bag and freeze in the refrigerator for 24 hours; finally put the frozen mixture into a vacuum freeze dryer (model: FD-1-50; vacuum degree: 10Pa; cold trap coil temperature: -50 ℃) after drying, the flocculant composite graphene oxide airgel is obtained, wherein the graphene oxide content is 11%. Finally, the prepared flocculant-composite graphene oxide airgel is reduced to obtain the flocculant-composite graphene aerogel.

[0031] Adding 25 mg...

Embodiment 3

[0033] First, dissolve 2 g of anionic polyacrylamide in deionized water to prepare a dilute solution with a mass fraction of 1%, then add 0.75 g of graphene oxide into it, and after slight stirring, let it stand for 24 hours to form a suspended polyacrylamide / graphene oxide colloidal floc; Next, the prepared mixture is irradiated with microwaves for a short period of time for 20 seconds through a common microwave oven (brand: Haier; model: MW-2070M; firepower: medium fire), and then filter to remove the raffinate. Put the colloidal floc into a sealed bag and freeze in the refrigerator for 24 hours; finally put the frozen mixture into a vacuum freeze dryer (model: FD-1-50; vacuum degree: 10Pa; cold trap coil temperature: -50 ℃) after drying, the flocculant composite graphene oxide airgel is obtained, wherein the graphene oxide content is 27%.

[0034] When 25 mg of flocculant-composite graphene oxide airgel obtained by the above method was added to 100 mL of methylene blue sol...

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Abstract

The invention relates to a high adsorption performance composite flocculant aerogel and a preparation method thereof. An organic high polymer flocculant and a graphene based material are compounded by microwave irradiation and vacuum freeze drying to prepare an organic high polymer flocculant-graphene oxide composite aerogel, and the aerogel is subjected to reduction treatment so as to obtain an organic high polymer flocculant-graphene composite aerogel. The prepared aerogel material has the common advantages of the organic high polymer flocculant, grapheme and aerogel material, presents many surface active groups, large specific surface area, loose structure and rich pore structure, and can reach far more excellent effect than a single high polymer flocculant while it is applied to sewage treatment. The preparation process is simple and is easy to operate.

Description

technical field [0001] The invention belongs to the field of material science, and in particular relates to a composite flocculant aerogel with high adsorption performance and a preparation method thereof. Background technique [0002] In recent years, with the development of industrialization and urbanization, a large amount of wastewater containing harmful pollutants is produced and discharged into natural water bodies. Since these pollutants in industrial wastewater are difficult to be degraded by organisms and show high toxicity to organisms, they will cause serious damage to receiving water bodies, so they must be effectively removed. Although traditional sewage treatment methods can purify industrial wastewater to a certain extent, it is difficult to make the treated water meet the increasingly stringent sewage discharge standards. Therefore, finding an effective method to treat industrial wastewater has become a hot research topic in the field of water treatment worl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 杨晓霞李延辉杜秋菊邢明杰王宗花
Owner QINGDAO UNIV
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