Active carbon fiber electrodes undivided paired direct electro-oxidation and electro-reduction decolorizing method

An activated carbon fiber and electro-oxidation technology, applied in chemical instruments and methods, oxidized water/sewage treatment, reduced water/sewage treatment, etc., can solve the problems of high efficiency and low consumption, reduce power consumption, improve current efficiency and decolorization efficiency , The effect of solving the problem of high-efficiency and low-consumption decolorization

Inactive Publication Date: 2011-10-26
FUJIAN UNIV OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a paired direct electro-oxidation and electro-reduction decolorization method of activated carbon fiber el

Method used

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  • Active carbon fiber electrodes undivided paired direct electro-oxidation and electro-reduction decolorizing method
  • Active carbon fiber electrodes undivided paired direct electro-oxidation and electro-reduction decolorizing method
  • Active carbon fiber electrodes undivided paired direct electro-oxidation and electro-reduction decolorizing method

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Embodiment 1

[0032] The reactive brilliant blue KN-R dye waste water that initial concentration is 250mg / L imports in the reaction tank 13 without diaphragm that establishs an activated carbon fiber anode 11 and an activated carbon fiber cathode 12 inside, connects the stabilized voltage / steady current power supply to the activated carbon fiber Anode 11 and activated carbon fiber cathode 12, after electrification, the ACF anode is positively polarized at a potential of 0.6V for 2 hours, and the ACF cathode is negatively polarized at a potential of -0.8V for 2 hours, and then the current density is controlled to 1.0 ~ 1.1mA / cm 2 , paired direct electro-redox decolorization degradation of dye wastewater, the highest decolorization rate reaches 87%.

[0033] Its specific implementation method and process are as follows:

[0034] Such as figure 2 Shown is a schematic diagram of the relationship curve between the decolorization rate of reactive brilliant blue KN-R dye wastewater and the anode...

Embodiment 2

[0041] The second embodiment of the present invention differs from the first embodiment in that, for the amaranth dye wastewater with an initial concentration of 250mg / L, after power-on, the ACF anode is positively polarized for 2 hours at a potential of 0.6V, and the ACF cathode is positively polarized at a potential of 0.6V. Negative polarization at -0.4V potential for 2 hours, and then control the current density to 0.7-0.9mA / cm 2 , paired direct electro-redox decolorization of dye wastewater, the decolorization rate is as high as 96%.

[0042] Its specific implementation method and process are as follows:

[0043] Such as Figure 11 Shown is a schematic diagram of the relationship between the decolorization rate of amaranth dye wastewater and the anode potential. Such as Figure 12 Shown is a schematic diagram of the relationship between the normalized absorbance ratio of amaranth dye wastewater and the anode potential. In an electrolyzer with a diaphragm, according to...

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Abstract

The invention provides an active carbon fiber electrodes undivided paired direct electro-oxidation and electro-reduction decolorizing method. According to the method, in an undivided electrochemical reactor, active carbon fiber (ACF) is adopted as an anode for electro-oxidation, and as a cathode for electro-reduction. After electrification, the ACF electrodes are polarized for 2 hours, and then dye waste water is electrolyzed. The undivided electrochemical reactor is a reaction tank provided with an ACF anode an ACF cathode, which are undivided. According to the present invention, ACF is adopted both in an anode for electro-oxidation, and in a cathode for electro-reduction. Direct electro-oxidation and electro-reduction occur between the anode and the cathode, such that electrolyzing and decolorizing can be carried out. With the method provided by the present invention, current efficiency and decolorizing efficiency can be improved, and power consumption can be reduced, such that the decolorizing of industrial dye wastewater can be carried out with high efficiency and low consumption.

Description

【Technical field】 [0001] The invention relates to a treatment method for dye industrial wastewater and printing and dyeing wastewater, in particular to a paired direct electrooxidation and electroreduction decolorization method of activated carbon fiber electrodes without a diaphragm. 【Background technique】 [0002] my country is a big country in the production and application of dyestuffs (including textile printing and dyeing). There are more than 500 kinds of dyestuffs in production, and all kinds of dyestuffs are produced. The annual output reaches 40,000 tons, accounting for 45% of the world's total output. For every ton of dye produced, 2% of the product will be lost with wastewater. Printing and dyeing wastewater is an important source of pollution in the textile industry. During the dyeing process, about 10% of the dye is lost with the wastewater because it is not dyed. The wastewater discharge of my country's textile printing and dyeing industry is about 300-400×106...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72C02F1/70
Inventor 杨卫身
Owner FUJIAN UNIV OF TECH
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