Method for catalytic degradation of organic dye wastewater based on cooperation of tungsten powder and ultrasonic
An organic dye, catalytic degradation technology, applied in chemical instruments and methods, textile industry wastewater treatment, oxidized water/sewage treatment, etc., can solve the problems of poor treatment effect and high energy consumption of organic matter
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[0050] 1. The preparation method of methyl orange dye wastewater is as follows:
[0051] Dissolve the methyl orange powder in deionized water and make it constant to obtain a methyl orange solution. Take a certain amount of the obtained methyl orange solution and add an appropriate amount of deionized water to dilute to obtain the required 1g·L -1 methyl orange dye wastewater;
[0052] 2. Prepare 1g·L -1Dilute to different concentrations and draw a standard curve after the determination of the maximum absorption wavelength of the methyl orange dye wastewater (so that the standard curve is used to calculate the concentration, and then calculate the degradation rate);
[0053] 3. Take the concentration as 1g·L -1 The methyl orange dye wastewater solution was placed in a jacketed beaker, diluted with water to a concentration of 20mg / L, and the pH value was adjusted (2, 3, 4, 5, 6) to control the dissolved oxygen concentration of the system (0-8.6mg L -1 ), use a constant tempe...
Embodiment 1
[0077] The method for degrading organic dye wastewater based on tungsten powder synergistic ultrasonic catalysis comprises the following steps:
[0078] 1) Adjust the pH value of the organic dye wastewater to 3, and the reaction is carried out in an atmospheric environment to maintain the dissolved oxygen concentration of the methyl orange dye wastewater at 8.6mg L -1 And control the temperature of the wastewater to 25°C through a constant temperature water bath;
[0079] 2) Pass hydrogen peroxide into the organic dye wastewater, the concentration of hydrogen peroxide is 5mmol L -1 ; Then add tungsten powder to the organic dye wastewater and mix evenly; control the temperature of the wastewater at 45°C for ultrasonic degradation in an ultrasonic device with an ultrasonic power of 500W, and the amount of tungsten powder added is 1g L -1 .
Embodiment 2
[0081] The method for degrading organic dye wastewater based on tungsten powder synergistic ultrasonic catalysis comprises the following steps:
[0082] 1) Adjust the pH value of the organic dye wastewater to 5, and at the same time adjust the dissolved oxygen concentration of the methyl orange dye wastewater to 1.0mg L -1 And control the temperature of the wastewater to 25°C through a constant temperature water bath;
[0083] 2) Pass hydrogen peroxide into the organic dye wastewater into the organic dye wastewater, the concentration of hydrogen peroxide is 5mmol / L (5mmol / L); then add tungsten powder to the organic dye wastewater, mix well; when the ultrasonic power is 100W, the ultrasonic temperature is 80 Ultrasonic degradation is carried out in an ultrasonic device at ℃, and the amount of tungsten powder added is 10g L -1 .
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