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Dye wastewater treatment method

A treatment method and technology for dye wastewater, applied in energy wastewater treatment, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of easy dispersion and recovery, secondary pollution, difficulty, etc. The effect of dosage and cost reduction

Inactive Publication Date: 2013-06-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 Powder materials are easy to disperse and difficult to recycle during use, and it is easy to cause secondary pollution, which limits the use of powder TiO 2 Large-scale industrial application of photocatalyst-based photocatalytic technology

Method used

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  • Dye wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The base material is an industrial titanium plate with a thickness of 2mm and a size of 5cm×8cm. 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 an industrial titanium plate as the anode and platinum as the counter electrode at room temperature, electrochemically anodize at 30V for 1h, and then heat treat at 450°C for 2h, that is, the surface of the titanium plate is obtained. ordered TiO 2 The nanotube array film layer has an inner diameter of 80-90nm and a tube length of about 600nm.

[0019] (2)TiO 2 Nanotube arrays degrade organic wastewater. Put 500mL waste water in the reactor, adjust the pH value of the system to 3.0, and then put TiO 2 Nanotube array film layer. At the beginning of the reaction, the reaction was stirred for 30 minutes in a dark state to reach adsorption equil...

Embodiment 2

[0021] Fenton degrades organic wastewater. Put 500mL wastewater into the reactor, adjust the pH value to 3.0, add 1.5×10 -3 Fe of M 2+ Solution 2mL, 3.75×10 -3 M of H 2 o 2 Solution 3mL, and then degrade the wastewater under the irradiation of a 200W high-pressure mercury lamp, take samples every 20 minutes, measure the change of the absorbance of the wastewater, and obtain the degradation rate of the wastewater. Its photocatalytic degradation effect on wastewater is as follows: figure 1 shown. It can be seen that the degradation rate of wastewater increases with the increase of light time.

Embodiment 3

[0023] (1) TiO 2 The preparation of the nanotube array film layer is the same as in Example 1.

[0024] (2)TiO 2Nanotube arrays cooperate with Fenton's reagent to degrade organic wastewater. 500mL waste water was placed in the reactor, the pH value was adjusted to 3.0, and the TiO 2 The nanotube array film layer was put into the wastewater, and then 1.5×10 -3 Fe of M 2+ Solution 2mL, 3.75×10 -3 M of H 2 o 2 Solution 3mL. At the beginning of the reaction, the reaction was stirred for 30 minutes in a dark state to reach adsorption equilibrium, and then the wastewater was degraded under the irradiation of a 200W high-pressure mercury lamp. Samples were taken every 20 minutes to measure the change in the absorbance of the wastewater to obtain the degradation rate of the wastewater. Its photocatalytic degradation effect on wastewater is as follows: figure 1 shown. It can be seen that TiO 2 The degradation rate of wastewater by the nanotube array and Fenton synergistic ...

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Abstract

The invention discloses a dye wastewater treatment method, and relates to wastewater treatment. The method comprises the following steps of: pretreating the surface of an industrial titanium plate, preparing a solution containing fluorine ions, using the industrial titanium plate as a positive electrode and common metal as a counter electrode, oxidizing the positive electrode to obtain a TiO2 nanotube array film with an orderly structure and controllable size on the surface of the titanium, and performing heat treatment on the TiO2 nanotube array film to obtain an anatase TiO2 nanotube array film; putting the anatase TiO2 nanotube array film into a reactor filled with wastewater, adding a Fe2+ solution and a H2O2 solution, regulating the pH of the solution to be 2-5, and performing photocatalytic degradation of the wastewater by taking a high pressure mercury lamp as a light source under the condition of introducing oxygen; and taking a TiO2 nanotube array out, and performing ultrasonic cleaning with water for recycle. The photocatalytic treatment efficiency of the TiO2 nanotube array on the wastewater is improved; and the consumption of a Fenton reagent is reduced, the cost is reduced and the treatment efficiency is improved; and a photocatalyst has the characteristics of high stability and capacity of being repeatedly used.

Description

technical field [0001] The invention relates to a treatment of waste water, in particular to a treatment method of dye waste water. Background technique [0002] Titanium dioxide (TiO 2 ) is an important inorganic semiconductor functional material, which has the characteristics of humidity sensitivity, gas sensitivity, dielectric effect, photoelectric conversion and superior photocatalytic performance. It is used in sensors, dielectric materials, self-cleaning materials, solar cells, photocatalytic degradation Pollutants and other high-tech fields have important application prospects, and have become one of the hot research topics at home and abroad. with general nano-TiO 2 Compared with powder and granular film, TiO prepared on the surface of titanium metal substrate by anodic oxidation method 2 The nanotube array has a larger specific surface area and stronger adsorption capacity due to its special structure, and the nanotubes are directly connected to the metal titaniu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/30
CPCY02W10/37
Inventor 孙岚王莹莹龙云谢鲲鹏林昌健
Owner XIAMEN UNIV
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