Electrocatalysis wet-type peroxide oxidizing method for high-effect waste water processing and devices thereof

A technology for treating wastewater and hydrogen peroxide, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc. Achieve the effect of avoiding catalyst loss, simple and easy separation, and good device expansion.

Inactive Publication Date: 2010-03-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One is the use of powdery or granular solid-phase catalysts, which are difficult to separate. For this reason, noble metal-supported catalysts or transition metal oxide-supported catalysts are sometimes used, but the subsequent treatment is more cumbersome; the other is in catalytic wet oxidation. During the process, the re...

Method used

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  • Electrocatalysis wet-type peroxide oxidizing method for high-effect waste water processing and devices thereof
  • Electrocatalysis wet-type peroxide oxidizing method for high-effect waste water processing and devices thereof

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1: as figure 2 As shown, the device consists of a temperature probe 1, a temperature controller 2, an autoclave 3, a cathode electrode 4, an anode electrode 5, a magnetic stirrer 6, a pressure gauge 7, a liquid phase sampling valve 8, a gas phase sampling valve 9 and a heater 10 components, one end of the cathode electrode 4 and one end of the anode electrode 5 are respectively inserted into the high-pressure reactor 3, and the other end of the cathode electrode 4 and the other end of the anode electrode 5 are respectively connected to the negative and positive poles of the power supply through wires. The wire passes through the top of the autoclave 4, and the outer wall is insulated, so it is still a closed system in design. The high-pressure reaction kettle 3 and the heater 10 are placed on the magnetic stirrer 6 together, the temperature probe 1 is inserted into the heater 10, the side below the heater 10 is connected to the temperature controller 2, and ...

Embodiment 2

[0024] Embodiment 2: process 2,4-dichlorophenoxyacetic acid waste water

[0025] The titanium plate loaded with nano-platinum particle electrocatalyst is used as the anode electrode 5, and the pure titanium plate is used as the cathode electrode 4. The areas of the cathode electrode 4 and the anode electrode 5 are both 11.6 cm 2 , The electrode spacing is 2cm. The concentration of simulated wastewater 2,4-dichlorophenoxyacetic acid is 100mg / L, and the supporting electrolyte is 0.05mol / L Na 2 SO 4 , the treatment volume is 0.45L. The reactor was filled with N 2 To 0.5MPa, hydrogen peroxide concentration 0.2mol / L. When using the electrocatalytic wet hydrogen peroxide oxidation method, a certain voltage is applied to the cathode and anode, so that the current density of the titanium plate loaded with nano-platinum particle electrocatalyst is 5mA / cm 2 . Nano-platinum catalyzed wet hydrogen peroxide oxidation was used as a comparative test to compare the effects. The removal...

Embodiment 3

[0027] Embodiment 3: process methyl orange wastewater

[0028] The titanium plate loaded with nano-platinum particle electrocatalyst is used as the anode, and the pure titanium plate is used as the cathode, and the electrode area is 8cm 2 , the distance between the electrodes is 2cm, the concentration of methyl orange in the simulated wastewater is 100mg / L, and the supporting electrolyte is 0.05mol / LNa 2 SO 4 , the treatment volume is 0.28L. The reactor was filled with N 2 To 0.3MPa, hydrogen peroxide concentration 0.1mol / L. When using the electrocatalytic wet hydrogen peroxide oxidation method, a certain voltage is applied to the cathode and anode, so that the current density of the titanium plate loaded with nano-platinum particle electrocatalyst is 5mA / cm 2 . Nano-platinum catalyzed wet hydrogen peroxide oxidation was used as a comparative test to compare the effects. The removal rate of TOC also showed that the mineralization rate of methyl orange by electrocatalytic...

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Abstract

The invention relates to an electrocatalysis wet-type peroxide oxidizing method for high-effect waste water processing and devices thereof. Devices used for the method comprise a high-pressure reaction kettle, a heater, a temperature controller, a magnetic stirrer, a pressure meter, a liquid-phase sampling valve, a gas-phase sampling valve, a replaceable anode electrode and a replaceable cathode electrode. The invention uses a nanometer platinum electrode as an electrocatalyst of wet-type catalysis oxidization to be applied in the organic pollutant of difficult biochemical degradation. Compared with the common catalysis wet-type peroxide method of a nanometer platinum catalyst, the invention accelerates the oxidizing reaction velocity and the mineralizing velocity of the organic pollutant,and reduces the oxidizing and activating energy of the primary reacting substance. Under the condition of same time and different temperatures, the removal rate of TOC in 2, 4-dichlorphenoxyacetic acid is increased by 80 to 93 percent. The anode of the device used by the method can be a replaceable anode, and flat plate electrodes in common use such as a boron-mixed diamond membrane electrode, alead dioxide electrode, a tin dioxide electrode and the like can be applied in the method of waste water processing. The technology has simple operation, and has good processing effect on organic waste water, and wide application prospect and developing potential.

Description

technical field [0001] The invention belongs to the technical field of organic pollution wastewater treatment, and in particular relates to an electrocatalytic wet hydrogen peroxide oxidation method and a device for efficiently treating wastewater. Background technique [0002] With the continuous development of social industrialization, global environmental problems have become increasingly prominent, especially the discharge of a large amount of industrial and agricultural sewage and domestic wastewater has caused serious pollution of water bodies by organic matter; due to the variety of organic pollutants, complex material structure, toxic and harmful Therefore, in recent years, how to deal with refractory biodegradable organic pollutants in water bodies has become a key and difficult point in environmental protection research. [0003] Advanced oxidation technology is a popular research technology that is considered to have good development prospects, mainly including we...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/02C02F1/72C02F1/461
Inventor 赵国华吕保樱高俊侠
Owner TONGJI UNIV
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