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Layered double-metal hydroxide, composite membrane, application of composite membrane, and suction filtration device

A layered bimetallic and hydroxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, oxygen/ozone/oxide/hydroxide, nickel compound, etc., can solve the energy consumption of thermal activation technology Large, toxic, carcinogenic and other problems, to achieve high application prospects and use value, easy operation, low cost effect

Inactive Publication Date: 2019-06-11
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Triphenylmethane dyes are widely used as industrial dyes due to their bright color, high color fixation rate, and good color fastness. One of the wastewater that urgently needs to be treated
Among these activation methods, thermal activation technology is fast and efficient and can regulate the degradation rate of organic matter through temperature, but thermal activation technology consumes too much energy and is not suitable for large-scale polluted water bodies and soils
Photoactivation technology is safe and non-toxic, does not cause secondary pollution, and is suitable for the treatment of drinking water and slightly polluted water, but there is a problem of energy consumption

Method used

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  • Layered double-metal hydroxide, composite membrane, application of composite membrane, and suction filtration device
  • Layered double-metal hydroxide, composite membrane, application of composite membrane, and suction filtration device
  • Layered double-metal hydroxide, composite membrane, application of composite membrane, and suction filtration device

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a layered double metal hydroxide, which is prepared by the following steps:

[0047] Weigh cobalt nitrate hexahydrate, copper nitrate trihydrate and anhydrous sodium carbonate reagents, place in deionized water, stir and dissolve to obtain a mixed solution. Add sodium hydroxide solution dropwise to the solution to adjust the pH of the solution, then heat the system and keep stirring to complete the reaction and generate a light brown precipitate. After the precipitate was washed, centrifuged and dried, Co-Cu-LDH nanosheets were obtained. Among them, the molar ratio of cobalt nitrate hexahydrate, copper nitrate trihydrate and anhydrous sodium carbonate is 2:1:3, the pH is 9, the heating temperature is 60°C, the heating time is 24 hours, and the drying time is 48 hours.

Embodiment 2

[0049] The present embodiment provides a kind of composite film, and it is prepared through the following steps:

[0050] Place the Co-Cu-LDH nanosheets and nanofibers prepared in Example 1 in a mixed solution of N,N-dimethylformamide (DMF) and polyethylene glycol 200 (PEG200) for ultrasonic dispersion to ensure uniform mixing . Then, the mixed solution is fully stirred, so that the Co-Cu-LDH nanosheets adhere to the surface of the nanofibers; then, in the vacuum filtration device, after laying an organic filter membrane, pour the fully stirred suspension, and vacuum After filtration, the activated PMS composite membrane is obtained. Among them, the mass ratio of Co-Cu-LDH nanosheets to nanofibers is 1:1, the volume ratio of N,N-dimethylformamide (DMF) to PEG200 is 2:1, and the ultrasonic dispersion time is 15 minutes. The stirring time is 15 hours, and the suction filtration condition is -0.1Mpa, 10 minutes.

Embodiment 3-4

[0052] Examples 3-4 provide a layered double metal hydroxide, the preparation method of which is basically the same as the preparation method of the layered double metal hydroxide provided in Example 1, except that the operating conditions are different.

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Abstract

The invention relates to the field of sewage treatment, and particularly relates to a layered double-metal hydroxide, a composite membrane, an application of the composite membrane, and a suction filtration device. A peroxymonosulfate compound is activated by using the layered double-metal hydroxide, then sulfate radical free radicals with strong oxidizing capability are generated, organic pollutants in wastewater are oxidized and degraded, and theus the purpose of water purification is achieved. Furthermore, the composite membrane is further arranged, so that the wastewater purification effect can be improved through the synergistic effect of the layered double-metal hydroxide and the nanofibers, and the purification rate is accelerated.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a layered double metal hydroxide, a composite membrane and its application and a suction filtration device. Background technique [0002] Protecting the water environment from pollution is a social issue of widespread concern to human beings. With the development of modern industry, the use of various organic substances and the discharge of organic wastewater have caused the pollution of the surface water environment, and the generation of organic wastewater has caused a serious threat to water resources. Among these pollutions, industrial dye wastewater is the main source of water pollution. Triphenylmethane dyes are widely used as industrial dyes due to their bright color, high color fixation rate, and good color fastness. One of the waste water that urgently needs to be treated. Rhodamine B, as a triphenylmethane derivative, has good water solubility, is easy to analyze, and...

Claims

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Application Information

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IPC IPC(8): C01B13/36C01G51/00C01G53/00B82Y40/00B01J23/75C02F1/72C02F1/44B01D69/12B01D67/00C02F101/30C02F101/34C02F101/36C02F101/38
Inventor 程修文郭若男王忠娟陈功李波
Owner LANZHOU UNIVERSITY
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