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Carbon membrane with triple functions of adsorption/electrocatalysis/membrane separation and its preparation method

A membrane separation and electrocatalysis technology, which is applied in semipermeable membrane separation, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the impact on health and life safety, high equipment investment, refractory degradation, bioaccumulation, etc. problems, to achieve the effect of saving equipment investment, simplifying advanced processing technology, and broad application prospects

Active Publication Date: 2020-07-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the concentration of pollutants in slightly polluted source water is very low, due to its characteristics of refractory degradation and bioaccumulation, it has a serious impact on human health and life safety.
On the other hand, the reuse of industrial wastewater and urban sewage has great potential in alleviating the shortage of fresh water resources. However, the current wastewater after secondary treatment usually still cannot meet the requirements of discharge and reuse standards. The main problem is secondary treatment. Some refractory organic matter remains in the water
However, different membrane technologies such as microfiltration and ultrafiltration have certain limitations, and cannot meet the requirements of advanced water treatment alone; although reverse osmosis technology can meet the requirements of advanced treatment, the pressure driving force required is relatively large, making High energy consumption, but also facing the problem of membrane fouling
In the actual water advanced treatment process, the combined application of membrane technology, activated carbon or biological activated carbon and advanced oxidation technology is usually used to reduce energy consumption and improve the treatment effect, but this combination process is complicated and the equipment investment is high.
The above reasons have led to the high cost of advanced water treatment at present.

Method used

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  • Carbon membrane with triple functions of adsorption/electrocatalysis/membrane separation and its preparation method
  • Carbon membrane with triple functions of adsorption/electrocatalysis/membrane separation and its preparation method
  • Carbon membrane with triple functions of adsorption/electrocatalysis/membrane separation and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Get 90g activated carbon (median diameter is 15 μm, specific surface area is 1041m 2 / g), 3g graphite, 5g polyethylene chopped fibers, and 5g iron oxide powder are fully mixed, 15g carboxymethyl cellulose is dissolved in 75g hot water, and after cooling, it is added to the powder and mixed thoroughly, and then 15g thermosetting phenolic aldehyde is added Resin, after mixing and stirring, roll and grind the mud, seal and age for 48 hours, use an extruder to make a tubular original film, after completely drying, immerse the original film in 5wt% phenolic resin solution for 2 minutes, take it out at a uniform speed, dry it again, and put it under nitrogen protection Carbonization under low temperature (rise from room temperature at 3°C / min to 170°C, keep the temperature for 90 minutes, then rise to 800°C and keep the temperature for 30 minutes). The performance of the triple-functional carbon membrane is obtained, as shown in Table 1, wherein the treatment effect is the re...

Embodiment 2～4

[0054] According to the steps of Example 1, but the precursor was prepared according to the parameters in Table 1, the properties of the obtained triple-functional carbon membrane are shown in Table 1.

[0055] Table 1

[0056]

Embodiment 5

[0058] Get 90g hollow carbon microspheres (median diameter is 18 μm, specific surface area is 805m 2 / g), 5g of carbon black, 3g of polyester chopped fiber and 3g of titanium dioxide powder are fully mixed, 20g of starch is dissolved in 80g of hot water, after cooling, they are added to the powder and fully mixed, then 20g of benzoxazine resin is added, and mixed After stirring, grind the mud with a roller, seal and age for 48 hours, use an extruder to make a tubular original film, dry it and carbonize it under the protection of nitrogen. , keep the temperature for 30 minutes, take it out after natural cooling, and obtain the carbon film substrate. The prepared carbon membrane substrate was immersed in a 10wt% polyimide solution for 5 minutes, then taken out at a constant speed, dried and carbonized under the protection of nitrogen (5°C / min to 550°C for 30min). The performance of the triple function carbon membrane is obtained, as shown in Table 2, wherein the treatment effec...

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Abstract

The invention relates to a carbon membrane with triple functions of adsorption / electrocatalysis / membrane separation and a preparation method thereof, and belongs to the technical field of new membrane materials. Based on the electrocatalytic carbon membrane, the present invention proposes to use a porous carbon material with adsorption function as a precursor to prepare a carbon membrane, adjust its multi-level pore structure, regulate its adsorption and membrane separation performance, and at the same time load the catalyst on the carbon membrane matrix to achieve Integrating the triple functions of adsorption / electrocatalysis / membrane separation, carbon-based membrane materials with triple functions of adsorption / electrocatalysis / membrane separation are designed and prepared. This triple-functional carbon membrane material is used for deep purification of source water and deep treatment of wastewater. Its developed pore structure can effectively absorb organic molecules, microorganisms, heavy metals and other pollutants in the water, allowing them to be enriched on the membrane surface and pores. At the same time, Combined with membrane separation and electrocatalytic oxidation functions, pollutants are separated and degraded to achieve deep purification.

Description

technical field [0001] The invention relates to a carbon membrane with triple functions of adsorption / electrocatalysis / membrane separation and a preparation method thereof, belonging to the technical field of new membrane materials. Background technique [0002] Water is the source of life and a precious resource necessary for people's production and life. However, with the rapid development of industry and the rapid growth of population, the source water in many areas of our country is affected by pollutants and becomes slightly polluted source water. Although the concentration of pollutants in slightly polluted source water is very low, due to its characteristics of refractory degradation and bioaccumulation, it has a serious impact on human health and life safety. On the other hand, the reuse of industrial wastewater and urban sewage has great potential in alleviating the shortage of fresh water resources. However, the current wastewater after secondary treatment usually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/02B01J20/30B01J20/20B01J21/18B01J23/34B01J23/72B01J23/745B01J23/755B01J35/00C02F1/28C02F1/44C02F1/467C02F101/30C02F101/20
CPCB01D67/0083B01D71/024B01J20/06B01J20/20C02F1/283C02F1/44C02F1/4672B01J21/18B01J23/34B01J23/72B01J23/745B01J23/755C02F2101/20C02F2101/30B01J35/33
Inventor 李琳潘宗林杨佳伟陶平宋成文王春雷王同华
Owner DALIAN UNIV OF TECH
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