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Method for processing dye wastewater by applying nanocomposite photocatalyst combination-Fenton

A dye wastewater and photocatalyst technology, which is applied in the fields of light water/sewage treatment, oxidized water/sewage treatment, textile industry wastewater treatment, etc. The effect of processing efficiency, reducing dosage and improving efficiency

Active Publication Date: 2012-10-03
广东碧之江环保能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are not effective for TiO 2 The effect of nanotube array photocatalytic activity enhancement is still very limited

Method used

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  • Method for processing dye wastewater by applying nanocomposite photocatalyst combination-Fenton
  • Method for processing dye wastewater by applying nanocomposite photocatalyst combination-Fenton
  • Method for processing dye wastewater by applying nanocomposite photocatalyst combination-Fenton

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) The base material is an industrial Ti plate with a thickness of 2mm and a size of 2cm×3cm. The surface is polished with metallographic sandpaper until there are no scratches, cleaned ultrasonically with acetone, ethanol and three times of water, and dried for later use. Prepare an electrolyte solution of 0.5wt% HF, use the industrial Ti plate as the anode and platinum as the counter electrode at room temperature, electrochemical anodize at 30V for 1h, and then heat treat at 500°C for 2h, that is, on the surface of the industrial Ti plate Obtain ordered TiO 2 Nanotube array photocatalyst, that is, Ti-based TiO 2 Nanotube Array Photocatalysts.

[0031] (2) Ti-based TiO 2 Nanotube array photocatalysts for degradation of dye wastewater. 200mL, 50mg L -1 The dye wastewater is placed in the reactor, the pH of the system is adjusted to 6.5, and then the titanium-based TiO 2 Nanotube Array Photocatalysts. At the beginning of the reaction, air was introduced in a dark ...

Embodiment 2

[0034] h 2 o 2 Degradation of dye wastewater. 200mL, 50mg L -1 The dye wastewater is placed in the reactor, the pH value is adjusted to 6.5, and 0.125mmol H 2 o 2 , and then degrade the dye wastewater under the irradiation of a 200W ultra-high pressure spherical mercury lamp, take water samples every 30 minutes, measure the change of the absorbance of the dye wastewater, and obtain the degradation rate of the dye wastewater.

Embodiment 3

[0036] h 2 o 2 Degradation of dye wastewater. 200mL, 50mg L -1 The dye wastewater is placed in the reactor, the pH value is adjusted to 6.5, and 0.375mmol H 2 o 2 , and then degrade the dye wastewater under the irradiation of a 200W ultra-high pressure spherical mercury lamp, take water samples every 30 minutes, measure the change of the absorbance of the dye wastewater, and obtain the degradation rate of the dye wastewater.

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Abstract

The invention discloses a method for processing dye wastewater by applying nanocomposite photocatalyst combination-Fenton, relating a method for processing the dye wastewater. The method comprises the following steps of: pre-processing the surface of a Ti plate; preparing a solution containing fluoride ions; oxidizing an anode to obtain a Ti-based TiO2 nanotube array photocatalyst on the surface of the Ti plate, wherein the Ti plate serves as the anode, and a platinum sheet serves as a counter electrode; preparing Fe (NO3)3 aqueous solution; preserving constant temperature in water bath until the solution is turned from slight yellow into red brown; immersing the Ti-based TiO2 nanotube array photocatalyst into the Fe (NO3)3 aqueous solution for ultrasound; drying and heating to obtain a Ti-based Fe2O3 / TiO2 nanotube array composite photocatalyst; placing in a reactor loaded with the dye wastewater; adding H2O2; regulating pH of the solution to be between 2 and 10; taking a spherical mercury lamp as a light source; performing photocatalysis to degrade the dye wastewater in the condition of oxygen; and taking out the Ti-based Fe2O3 / TiO2 nanotube array composite photocatalyst and cleaning.

Description

technical field [0001] The invention relates to a treatment method for dye wastewater, in particular to a method for treating dye wastewater with nanocomposite photocatalyst combined with Fenton-like. Background technique [0002] In advanced oxidation technology, such as O 3 , O 3 / H 2 o 2 , Fenton, UV, UV / O 3 , UV / H 2 o 2 , O 3 / UV / H 2 o 2 , the Fenton method has the advantages of fast reaction speed, simplicity and easy operation. Because the Fenton reagent has a strong oxidizing ability, it is especially suitable for the degradation and mineralization of organic pollutants that are difficult to biodegrade or general chemical oxidation is difficult to achieve. Usually the Fenton method is a homogeneous catalytic oxidation method, with H 2 o 2 as oxidant, Fe 2+ or Fe 3+ As a catalyst, Fe in water 2+ or Fe 3+ with H 2 o 2 The strong oxidation of hydroxyl radicals can be generated by the action, which can trigger a chain reaction at room temperature, and fin...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/32C02F1/72C02F103/30
Inventor 孙岚苏钰丰吴奇林昌健
Owner 广东碧之江环保能源股份有限公司
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