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Foam geopolymer adsorbing material as well as preparation method and application thereof

A technology of geopolymers and adsorbent materials, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc., which can solve the problems of not being effectively developed, difficult to achieve pore connectivity, and difficult to control the pore structure. , to achieve the effect of excellent hydrophobic function, avoid alkali loss and efficient adsorption

Active Publication Date: 2021-09-24
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of foam geopolymers in the water environment has not been effectively developed. The main reasons are: 1) The geopolymer system is overbasic and contains a large amount of free alkali, which makes it not resistant to water, and it is easy to cause alkali loss when it encounters water. and weathering efflorescence; 2) The pore structure of the foam geopolymer is difficult to control, especially the connectivity of the pores

Method used

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  • Foam geopolymer adsorbing material as well as preparation method and application thereof
  • Foam geopolymer adsorbing material as well as preparation method and application thereof
  • Foam geopolymer adsorbing material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0035] A preparation method of foam geopolymer adsorption material, comprising the following process steps:

[0036] a. Mix 5 parts of fly ash, 2 parts of blast furnace slag and 3 parts of activated carbon according to the mass ratio to obtain a mixed dry material; add the mixed dry material to the activator at 100r / min and stir for 1min to obtain a mixing slurry, mix The mass ratio of dry material to the activator is 5:3.5; wherein, the particle size of fly ash and blast furnace slag is ≤45 μm, and the activated carbon is obtained by drying activated carbon particles with a particle size of 1mm-2mm at 100°C for 15h; The preparation method of the activator is as follows: after stirring and mixing the alkali solution and the sodium water glass according to the mass ratio of 4:1 for 20min, then leave it to stand for 24h to obtain; the alkali solution is a sodium hydroxide solution of 3.5mol / L; the sodium The modulus of water glass is 3.4;

[0037] b. Add 25wt% hydrogen peroxide...

Embodiment 2

[0041] A preparation method of foam geopolymer adsorption material, comprising the following process steps:

[0042] a. Mix 5 parts of fly ash, 3 parts of blast furnace slag and 2 parts of activated carbon according to the mass ratio to obtain a mixed dry material; add the mixed dry material to the activator at 110r / min and stir for 2min to obtain a mixing slurry, mix The mass ratio of dry material to the activator is 5:4; wherein, the particle size of fly ash and blast furnace slag is ≤45 μm, and the activated carbon is obtained by drying activated carbon particles with a particle size of 1mm-2mm at 110°C for 12h; The preparation method of the activator is: after stirring and mixing the alkali solution and the sodium water glass according to a mass ratio of 5:1 for 30 minutes, leave it to stand for 28 hours to obtain; the alkali solution is a sodium hydroxide solution of 4mol / L; the sodium water The modulus of the glass is 3.5;

[0043]b. Add 30wt% hydrogen peroxide and 1wt%...

Embodiment 3

[0047] A preparation method of foam geopolymer adsorption material, comprising the following process steps:

[0048] a. Mix 6 parts of fly ash, 2 parts of blast furnace slag and 2 parts of activated carbon according to the mass ratio to obtain a mixed dry material; add the mixed dry material to the activator at 120r / min and stir for 3min to obtain a mixing slurry, mix The mass ratio of dry material to the activator is 5:4.5; wherein, the particle size of fly ash and blast furnace slag is ≤45 μm, and the activated carbon is obtained by drying activated carbon particles with a particle size of 1mm-2mm at 120°C for 10h; The preparation method of the activator is as follows: after stirring and mixing the alkali solution and the sodium water glass according to a mass ratio of 6:1 for 40 minutes, leave it to stand for 30 hours to obtain; the alkali solution is a sodium hydroxide solution of 4.5mol / L; the sodium The modulus of water glass is 3.6;

[0049] b. Add 35wt% hydrogen perox...

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Abstract

The invention relates to the technical field of solid waste resource utilization, and particularly discloses a foam geopolymer adsorption material as well as a preparation method and application thereof. The preparation method of the foam geopolymer adsorption material comprises the following process steps: a, mixing fly ash, blast furnace slag and activated carbon according to a mass ratio to obtain a mixed dry material, adding the mixed dry material into an exciting agent, and stirring the mixture to obtain a stirred slurry; b, adding hydrogen peroxide and a lauryl sodium sulfate solution into the mixed slurry, stirring and mixing the mixture, adding the mixture into a mold, and sealing and curing the mixture to obtain an initial module; c, immersing the initial module into a modifier for ultrasonic impregnation, taking out and drying the initial module to obtain the foam geopolymer adsorption material. According to the preparation method of the foam geopolymer adsorption material provided by the invention, the foam geopolymer with high through holes and good hydrophobic performance can be obtained. The foam geopolymer has an efficient adsorption effect on various pollutants such as heavy metals and oil stains, and has an extremely high application prospect in the field of water pollution control.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a foam geopolymer adsorption material and its preparation method and application. Background technique [0002] Geopolymer is a kind of gelling material obtained by excitation of chemical alkali with silicon-aluminum solid waste as the main raw material. Due to its high mechanical strength, corrosion resistance, low-carbon environmental protection and many other advantages, geopolymer is widely considered as a green cementitious material that can replace or partially replace cement. By means of physical foaming or chemical foaming, bubbles can be introduced into the geopolymer system to obtain foam geopolymers with a porous structure. Because the foam geopolymer is loose and porous, it is widely used in the research and application of building functional materials such as lightweight partition wall materials, thermal insulation materials and sound insula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/262B01J20/20B01J20/28045C02F1/288
Inventor 邵宁宁董志君唐江松
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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