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Method for treating refractory organic wastewater by TiO2 film electrode photoelectric turnplate

An organic wastewater and thin-film electrode technology, which is applied in the field of environmental catalysis and electrochemistry, can solve the problems such as the decrease in the yield of photogenerated electrons and holes, the decrease in the light intensity of the electrode surface, and the decrease in the degradation efficiency of pollutants, so as to improve the utilization rate of light. , avoid light loss, improve the effect of photocatalytic efficiency

Inactive Publication Date: 2008-09-03
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, no matter in the ultraviolet region or the visible region, the organic solution (especially the colored organic wastewater) will have different degrees of light absorption, which will inevitably cause a large light loss of the excitation light source, making the light reaching the electrode surface The intensity decreases, which reduces the yield of photogenerated electrons and holes, and finally reduces the degradation efficiency of pollutants.
In order to improve the degradation efficiency, the power of the excitation light source can only be increased, which increases the operating energy consumption

Method used

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  • Method for treating refractory organic wastewater by TiO2 film electrode photoelectric turnplate
  • Method for treating refractory organic wastewater by TiO2 film electrode photoelectric turnplate
  • Method for treating refractory organic wastewater by TiO2 film electrode photoelectric turnplate

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Example 1 Direct Thermal Oxidation of Monolithic TiO 2 / Ti thin film electrode photoelectric turntable method for dye wastewater treatment

[0021] The treatment object is different concentrations of sunset yellow (0.6V, pH6.5, 0.65g / LNa 2 SO 4 ) and rhodamine B (0.8V, pH5.6, 1.0g / L Na 2 SO 4 ) to simulate dye wastewater. The waste water volume was 55 ml each.

[0022] Adding the electrolyte anhydrous sodium sulfate to the wastewater can improve the conductivity of the solution, and the addition amount is 0.5-2g per liter.

[0023] Process such as figure 1 Shown:

[0024] 1) Using a titanium disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate and fixed on the rotating shaft 3 in a monolithic manner to form a photoelectric turntable, which is used as a photoanode 6 , and the rotating shaft 3 of the photoanode is connected to the motor 2 .

[0025] 2) Place the photoanode 6 in the semi-arc reaction tank 5, the rotating shaft 3 of the photo...

Embodiment 2

[0031] Embodiment 2 sol-gel (sol-gel) monolithic TiO 2 / Ti film electrode photoelectric turntable to treat dye wastewater

[0032] The treatment object is Rhodamine B of different concentrations (pH2.5, 1.0g / L Na 2 SO 4 ) to simulate dye wastewater. The waste water volume was 55ml.

[0033] Process such as figure 1 Shown:

[0034] 1) Using a titanium disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate and fixed on the rotating shaft 3 in a monolithic manner to form a photoelectric turntable, which is used as a photoanode 6 , and the rotating shaft 3 of the photoanode is connected to the motor 2 .

[0035]2) Place the photoanode 6 in the semi-arc reaction tank 5, the rotating shaft 3 of the photoanode is at the water surface of the waste water, so that half of the photoanode is submerged in the waste water, and the photoanode is connected to the DC power supply 10 through the carbon brush 4 connected to the rotating shaft connected to the positive...

Embodiment 3

[0042] Embodiment 3 sol-gel (sol-gel) monolithic TiO 2 / Ti film electrode photoelectric turntable to treat actual printing and dyeing wastewater

[0043] The treatment objects are actual printing and dyeing wastewater raw water (pH12.4) and pretreated water (pH6.8). The wastewater was taken from a printing and dyeing factory in Changzhou. The waste water volume was 55 ml each.

[0044] Process such as figure 1 Shown:

[0045] 1) Using a titanium disc as a substrate, the TiO 2 The photocatalyst is loaded on the substrate and fixed on the rotating shaft 3 in a monolithic manner to form a photoelectric turntable, which is used as a photoanode 6 , and the rotating shaft 3 of the photoanode is connected to the motor 2 .

[0046] 2) Place the photoanode 6 in the semi-arc reaction tank 5, the rotating shaft 3 of the photoanode is at the water surface of the waste water, so that half of the photoanode is submerged in the waste water, and the photoanode is connected to the DC powe...

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Abstract

The invention relates to a method for processing refractory organic wastewater through a TIO2 membrane electrode photoelectric rotating disk. A TIO2 photocatalyst is loaded in a base through the direct thermal oxidation method or the sol-gel method, and is fixed on a rotating shaft in a single-chip mode or a multichip series mode to form the photoelectric rotating disk, which is used as a photo anode and is positioned into a semi arc reaction groove, one half of the photo anode is immersed into wastewater, a Cu sheet is used as a cathode, and the photo anode and the cathode are respectively connected with the positive electrode and the negative electrode of a power supply. The voltage of the direct current power supply is adjusted, and a motor is started and the rotating speed of the photo anode is controlled through a speed controller to form a layer of liquid membrane on the surface of the photo anode. An ultraviolet lamp or sunlight is used as an excitation light source, the excitation light source can illuminate the surface of the photo anode catalyser only by penetrating the liquid membrane, the absorption of organic wastewater to light is greatly reduced, the utilization of the excitation light source and the photoelectricity catalyzing degrading efficiency are enhanced, and meanwhile the exchanging and updating of the liquor substances on the surface of the electrode and in the main body are accelerated through the rotation of the rotating disk, the mass transfer is strengthened, and the degrading efficiency is enhanced.

Description

technical field [0001] The invention relates to a method for treating refractory organic wastewater, in particular to a TiO 2 The method of treating refractory organic wastewater with a thin-film electrode photoelectric turntable can amplify the application of photoelectric catalysis technology and improve the light efficiency. It belongs to the field of environmental catalysis technology and electrochemistry. Background technique [0002] With the in-depth development of industrial production, the types and discharge of industrial wastewater are increasing day by day, with more complex components, and often contain toxic and harmful chemical pollutants that are difficult to biodegrade, causing great harm to the environment and human health. Therefore, the treatment of refractory organic pollutants has become a hot spot in environmental science research all over the world. Therefore, at the same time as the research on biological methods, a series of so-called advanced oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/46
CPCY02W10/37
Inventor 贾金平徐云兰钟登杰王亚林陈思
Owner SHANGHAI JIAO TONG UNIV
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