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Microwave catalyst for degrading organic wastewater and catalytic oxidation degradation method thereof

A technology for microwave catalytic oxidation and organic wastewater, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Short time and other issues, to achieve the effect of shortened processing time, low investment and operating costs, and complete degradation

Inactive Publication Date: 2013-05-08
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the defects of low treatment efficiency, long time, low oxidant utilization rate and high treatment cost in the prior art, a new microwave catalyst and degradation method for degrading organic wastewater is proposed, using the catalyst of the present invention and the method for degrading organic wastewater method, can completely degrade organic wastewater, has short treatment time, high treatment efficiency, simple equipment operation, and no secondary pollution

Method used

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  • Microwave catalyst for degrading organic wastewater and catalytic oxidation degradation method thereof
  • Microwave catalyst for degrading organic wastewater and catalytic oxidation degradation method thereof
  • Microwave catalyst for degrading organic wastewater and catalytic oxidation degradation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Microwave catalytic reaction: Measure 100mL of 100mg / L methyl orange wastewater into a 500mL Erlenmeyer flask, add 1.8g of the catalyst prepared under the above conditions, and catalyze the reaction under the condition of microwave power of 600W.

[0043] Table 1 Microwave power is the degradation situation within 4-12min under 600W

[0044] time (min)

[0045] By adjusting the microwave irradiation power in this test method to be 200W, 400W, and 800W respectively, and treating 100mL of 100mg / L methyl orange wastewater, the initial concentration of methyl orange treated by this test method under different microwave powers is 100mg / L. The removal rate of organic matter in the solution is drawn as a curve, such as figure 1shown. It can be seen from the figure that the greater the microwave power, the greater the degradation rate of organic pollutants in wastewater. When the microwave power is 800W, the degradation rate reaches 99.1% after 12 minutes of microwav...

Embodiment 2

[0046] The impact of embodiment 2 catalyst dosage on methyl orange wastewater degradation rate

[0047] Measure 100mL of 100mg / L methyl orange wastewater into a 500mL Erlenmeyer flask with a microwave power of 600W and a catalyst dosage of 2.2g. The reaction is catalyzed under microwave conditions.

[0048] Table 2 Catalyst dosage is the degradation situation within 4~12min under 2.2g

[0049] time (min)

[0050] By adjusting the amount of catalyst in this test method to be 0.6g, 1.0g, 1.4g, 1.8g respectively, the methyl orange wastewater of 100mL100mg / L is processed, and the initial concentration of methyl orange obtained by using this test method under different catalyst amounts is The removal rate of organic matter in the solution of 100mg / L is drawn into a curve, such as figure 2 shown. It can be seen from the figure that the greater the amount of catalyst used, the greater the degradation rate of organic pollutants in wastewater. When the amount of catalyst ...

Embodiment 3

[0051] The impact of the initial concentration of embodiment 3 organic matter on degradation rate

[0052] Measure 100mL of 150mg / L methyl orange wastewater into a 500mL Erlenmeyer flask with a microwave power of 600W and a catalyst dosage of 1.8g. Catalyzed reaction under microwave conditions..

[0053] Table 3 The initial concentration of organic matter is 150mg / L, the degradation situation within 4 ~ 12min

[0054] time (min)

[0055] By adjusting the initial concentration of organic matter in this test method to be 50mg / L, 100mg / L, 200mg / L, and 250mg / L, the removal rate of organic matter treated by this test method under different initial concentrations of organic matter is obtained, and the curve is drawn, such as image 3 shown. It can be seen from the figure that the degradation rate decreases with the increase of the initial concentration.

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Abstract

The invention discloses a microwave catalyst for degrading organic wastewater and a catalytic oxidation degradation method thereof. The catalyst is of a porous structure and can be used for absorbing microwave, wherein in the adsorption of microwave, oxygen or air is introduced into the catalyst in the presence of water molecules so as to generate a large quantity of OH free radicals under microwave irradiation. By adopting the technical scheme, the microwave catalyst greatly improves the degradation efficiency, greatly shortens the processing time, is easy and feasible to operate, low in investment and operation costs, small in occupying area, complete in degradation, wide in concentration range of degrading the organic wastewater, easy for industrial production and suitable for treatment of organic wastewater in the industries of printing and dyeing, paper making, chemical industry, pharmacy and the like, and can perform continuous scale treatment; and moreover, the secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the field of catalytic oxidation degradation of organic wastewater, in particular to a method for degrading organic wastewater under a microwave field. Background technique [0002] Organic wastewater can be produced in many industrial processes, and its main sources are industrial wastewater such as papermaking, dyestuffs, pharmaceuticals, organic synthesis, petroleum refining, and pesticide production. Organic wastewater has complex components, difficult to degrade, poor biodegradability, high chroma, and difficult decolorization. This type of wastewater enters the environment and causes serious harm to the ecosystem. Therefore, it is urgent to explore new methods that can effectively degrade organic wastewater to control environmental pollution. [0003] At present, the methods used to degrade organic wastewater mainly include physical adsorption, biological decolorization, ultrasonic degradation, photocatalytic degradatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/10B01J21/18B01J23/745C02F1/72C02F1/74
Inventor 周继承蒋尊芳谌敏飞殷诚高令飞
Owner XIANGTAN UNIV
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