Ultrasonic oxidation process

The development of acoustochemistry makes people pay more and more attention to its application in water and wastewater treatment. The power source of ultrasonicoxidation is acoustic cavitation. When sufficient intensity ultrasonic waves (15Khz-20mhz) pass through the aqueous solution, the acoustic pressure amplitude exceeds the internal static pressure in the half cycle of acoustic negative pressure, and the cavitation nuclei in the liquid expand rapidly. In the half period of acoustic positive pressure, the bubble burst due to adiabatic compression, and the duration is about 0.1μs. At the moment of rupture, a local high temperature and high pressure environment of about 5000K and 100MPa is generated, and a strong impact microjet with a rate of 110m/s is generated.

The equipment used for ultrasonic oxidation is a magnetoelectric or piezoelectric ultrasonic transducer, which generates ultrasonic waves through electromagnetic energy exchange. Radiation plate ultrasonic meter, probe type and NAP reactor are used more in the laboratory. Ultrasonic oxidation reaction conditions are mild, usually carried out at room temperature, low requirements for equipment, is a pollution-free green treatment technology with broad application prospects.