Textile wastewater treatment method based on Fe3O4/CNTs composite dispersed electrode

A technology for textile wastewater and treatment method, which is applied in the textile industry wastewater treatment, water/sludge/sewage treatment, water/sewage treatment and other directions, can solve the problems of the electrode efficiency to be improved, the separation of refractory products, and the energy consumption to be reduced. , to achieve the effect of high reuse times, large processing capacity and low energy consumption

Inactive Publication Date: 2020-12-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrochemical oxidation method has a short reaction time and fast speed, uses electrons as the reactant, and does not add a strong oxidizing agent (strong reducing agent), which can avoid secondary pollution, but there is also the problem that the dye molecules after decolorization are still in the solution and difficult to degrade the product Separation, electrode efficiency needs to be improved, energy consumption needs to be reduced, etc.

Method used

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  • Textile wastewater treatment method based on Fe3O4/CNTs composite dispersed electrode
  • Textile wastewater treatment method based on Fe3O4/CNTs composite dispersed electrode
  • Textile wastewater treatment method based on Fe3O4/CNTs composite dispersed electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation method of ferric oxide / multi-walled carbon nanotube composite material comprises the steps:

[0061] (1) Weigh 100mg of multi-walled carbon nanotubes and add them to 30mL ethylene glycol, 10mL polyethylene glycol and 1.35gFeCl 3 ·6H 2 In the mixed solution of O composition, add the sodium acetate of 3.6g again, put into the supersonic cleaner 1h;

[0062] (2) Seal the mixed solution treated in step (1) in a stainless steel reaction kettle with a Teflon lining, and put it into a 200° C. electric constant temperature blast oven for 12 hours. After cooling to room temperature, wash it repeatedly with ethanol and water, then filter it with a vacuum pump, and dry it in an oven at 60°C to obtain the Fe3O4 / multi-walled carbon nanotube composite material Fe 3 o 4 / NWCNT.

[0063] The transmission electron microscope image of the prepared Fe3O4 / multi-walled carbon nanotube composite material is as follows figure 1 shown, from figure 1 It can be seen that: m...

Embodiment 2

[0065] The preparation method of ferric oxide / multi-walled carbon nanotube composite material comprises the steps:

[0066] (1) Weigh 100mg of multi-walled carbon nanotubes and add to the mixture of 20mL ethylene glycol, 15mL polyethylene glycol and 1.5gFeCl 3 ·6H 2 In the mixed solution of O composition, add the sodium acetate of 3.0g again, put into the ultrasonic cleaning device ultrasonic treatment 2h;

[0067] (2) Seal the mixed solution treated in step (1) in a Teflon-lined stainless steel reaction kettle, and put it in an electric constant temperature blast oven at 220° C. for 16 hours. After cooling to room temperature, wash it repeatedly with ethanol and water, filter it with a vacuum pump, and dry it in an oven at 70°C to obtain the Fe3O4 / multi-walled carbon nanotube composite material.

Embodiment 3

[0069] A kind of textile wastewater treatment method based on the ferroferric oxide / multi-walled carbon nanotube composite dispersed electrode of embodiment 1, comprises the steps:

[0070] Get 60mL of disperse blue 2BLN solution whose mass concentration is 25mg / L, add 1g / L sodium fluoroborate (NaBF 4 ), form the electrolyte, adjust the pH of the solution to be 3, and the Fe of 75mg embodiment 1 3 o 4 / NWCNT was added into the electrolytic cell as a dispersed electrode, and a DC voltage of 17V was applied between the positive and negative plates, and the reaction was performed for 3h.

[0071] By testing, the final decolorization rate is 98.79% (see specifically image 3 ).

[0072] By strong magnet adsorption, pure water washing, filtration, to the Fe of embodiment 3 3 o 4 / NWCNT was recovered, and the recovery rate reached 98.1%, and then the decolorization process of Example 3 was repeated 10 times, and the decolorization rate reached 97.20%.

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Abstract

The invention discloses a textile wastewater treatment method based on a Fe3O4/CNTs composite dispersed electrode, and belongs to the field of chemical and environmental protection. According to the invention, a ferroferric oxide/carbon nanotube composite material is used as a dispersed electrode, and the textile wastewater is treated by a three-dimensional electrode electrolytic cell, so that themethod has the advantages of high current efficiency, good treatment effect, large treatment capacity and low energy consumption, and can solve the problems of high COD, high pH value, large chromaticity, large water temperature and large water quantity of the textile wastewater. The ferroferric oxide/carbon nanotube composite material is used as the dispersion electrode, a disperse blue 2BLN solution is decolored under the conditions that the voltage is 17V, the electrolytic salt concentration is 1mol/L and the concentration of ferroferric oxide/carbon nanotubes is 75mg/L, the decoloring rate can reach 98.79 percent after 3 hours, and a better decoloring effect is achieved.

Description

technical field [0001] The invention relates to a Fe-based 3 o 4 The invention relates to a method for treating textile waste water with a composite dispersed electrode of CNTs, which belongs to the field of chemistry and environmental protection. Background technique [0002] my country is a big country in textile production and export, and its production and consumption of textiles rank first in the world. However, the textile industry is also one of the industries with a large amount of sewage discharge in the domestic light industry, which has caused greater environmental pressure. The wastewater produced in the textile, printing and dyeing process has the characteristics of high COD, high pH, ​​large chroma, large water temperature and large volume, which brings great challenges to the treatment of textile wastewater. [0003] At present, the commonly used methods for treating textile wastewater include: (1) Membrane separation method: using an ion exchange membrane ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F103/30
CPCC02F1/46109C02F2001/46133C02F2103/30
Inventor 李梦娟刘梦怡李晓强陈平杭李艳艳李克丽
Owner JIANGNAN UNIV
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