Method for processing wastewater by using photocatalytic reaction, and photocatalytic reactor

A photocatalytic reactor and photocatalytic reaction technology, applied in chemical instruments and methods, special compound water treatment, light water/sewage treatment, etc., can solve problems such as restricting the application scope of the reactor, complex structure, etc. , the effect of high reaction efficiency and good stability

Inactive Publication Date: 2015-01-28
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fountain-type solidified bed reactor fixes the catalyst on the slope, fixes the light source on the top, sprays the to-be-degraded product from the nozzle in the center of the slope, and then flows through the catalyst under the action of gravity to be degraded; however, the structure of this type of reactor is complex and seriously This restricts the scope of application of the reactor

Method used

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  • Method for processing wastewater by using photocatalytic reaction, and photocatalytic reactor
  • Method for processing wastewater by using photocatalytic reaction, and photocatalytic reactor
  • Method for processing wastewater by using photocatalytic reaction, and photocatalytic reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 Immobilized TiO with Activated Carbon as Carrier 2 preparation of

[0043] 1. Vector pretreatment

[0044] The main function of the oxidation treatment of activated carbon is to introduce oxygen-containing functional groups on the surface. It has been confirmed that when activated carbon is used as a metal catalyst carrier, the oxygen-containing functional groups on the surface of activated carbon can become active adsorption sites for certain metal ions. In the present invention, liquid-phase oxidation is used. This method can not only introduce oxygen-containing functional groups, but also remove ash from activated carbon.

[0045] The specific operation steps are as follows:

[0046] (1) First weigh an appropriate amount of activated carbon carrier, put it into a conical flask, add an appropriate amount of distilled water, and then stir evenly for 20 minutes;

[0047] (2) Put the activated carbon in the previous step into the ultrasonic cleaner, an...

Embodiment 2~6

[0058] Prepare TiO with the method for embodiment 1 2 Immobilized TiO with different loads 2 , use 35-55 mesh granular activated carbon, control the amount of impregnating liquid and the number of impregnating times, and prepare different TiO 2 The particles of the loading amount are shown in Table 1.

[0059] Table 1 Immobilized TiO of Examples 2~6 2 load capacity

[0060]

Embodiment 7

[0061] Example 7 Immobilized La-TiO with Activated Carbon as Carrier 2 preparation of

[0062] The pretreatment of the carrier is the same as that in Example 1.

[0063] 2. Preparation of sol

[0064] (1) Take out 1.1ml glacial acetic acid (A.R.), 1ml deionized H 2 O and 15ml absolute ethanol (A.R.). Slowly add glacial acetic acid dropwise to 1 ml of deionized H2O with stirring 2 O and 15ml of absolute ethanol to configure A solution.

[0065] (2) Take out 15ml of absolute ethanol (A.R.), 6ml of Ti (C 4 h 9 o) 4 , and 1 ml of glacial acetic acid (A.R.). 6ml of Ti(C 4 h 9 o) 4 Slowly add it dropwise into the mixed solution of 15ml of absolute ethanol and 1ml of glacial acetic acid under uniform stirring, and stir for 20min, add the metal modifier lanthanum nitrate to obtain a uniform and transparent B solution.

[0066] (3) Use a constant temperature magnetic stirrer to slowly add the A solution that has been moved to the constant pressure funnel into the B so...

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Abstract

The invention relates to a method for processing wastewater by using a photocatalytic reaction. According to the method, the photocatalytic reaction is carried out by using immobilized TiO2 or transition metal-doped TiO2 as a catalyst and the wastewater as a reaction medium, wherein the TiO2 is anatase TiO2; the transition metal is a rare earth element; a loading amount of the immobilized TiO2 or transition metal-doped TiO2 is 0.82%-1.24% (by weight); and the usage amount of the immobilized TiO2 or transition metal-doped TiO2 is 5-12 g in 1 L of the wastewater. A reaction light source of the photocatalytic reaction is a visible light source or an ultraviolet light source. The invention also relates to a photocatalytic reactor capable of realizing the above method. With the method provided by the invention, the photocatalytic reaction catalyzed by TiO2 can be carried out under the visible light and has high reaction rate.

Description

technical field [0001] The invention relates to a method for treating wastewater by photocatalytic reaction. [0002] The present invention also relates to a photocatalytic reactor capable of realizing the above photocatalytic reaction method. Background technique [0003] Nowadays, the human demand for water is increasing year by year, and at the same time, the pollution of water bodies continues to intensify, and the reuse of sewage has long been put on the agenda. As far as our country is concerned, the advanced treatment technology for sewage is not yet perfect, and the quality of a lot of treated water still cannot meet the reuse standard. There are refractory organic substances in the water, which accumulate and enrich for a long time, causing great harm. [0004] At present, the process flow of urban sewage treatment plants generally includes the function of biological contact oxidation to remove refractory organic matter in sewage. Therefore, considering the use o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/32
CPCY02W10/37C02F1/30C02F1/32C02F1/74C02F2305/10
Inventor 罗晓岳琳高如泰洪纲段二红宋日超张海竞王凤平
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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