Acoustic cavitation assisted plasma for wastewater treatment: Degradation of Rhodamine B in aqueous solution

Effect of gas injection on cavitation-assisted plasma treatment efficiency of wastewater

“…This is because cavitation bubbles are nucleated and grow rapidly when the surrounding pressure becomes low. On the other hand, as found in another our study [9] , pulse discharge and plasma channel formation start when comparatively large bubbles with the size of about 1 mm approach the high voltage electrode. Although the bubbles in cavitation zone can grow and coalesce with each other, the vast majority of cavitation bubbles in water have much smaller sizes.…”

“…More details on these phenomena can be found in our earlier papers [8] , [10] , [11] . In the following investigations, it was found that the acoustic streaming always has a beneficial effect on the efficiency of plasma treatment in both batches [9] and circulatory [8] reactors. As for acoustic cavitation, its effect on the plasma treatment efficiency is more complicated.…”

“…The experimental setup used was the same as that in our previous work [9] . Its schematic drawing is shown in Fig.…”

“…Based on the above findings, in our previous research, we proposed a novel technique of wastewater processing, acoustic cavitation assisted plasma (ACAP), which combines the high-voltage pulse discharge and acoustic cavitation [8] , [9] . The main idea was to exploit two phenomena occurring when ultrasound vibrations are introduced in liquids, namely acoustic cavitation and acoustic streaming.…”

Removal of Microcystis aeruginosa through the Combined Effect of Plasma Discharge and Hydrodynamic Cavitation

“…Of the many chemical and biological methods available, physical methods are being increasingly investigated, as they not only remove cyanobacterial biomass but also cyanotoxins, which is especially important for drinking water treatment. While electrochemical methods, such as electroporation, electrocoagulation or electroflotation [8], have been the subject of particular interest, plasma discharge in combination with advanced oxidation technologies fortified by ultrasonic or hydrodynamic cavitation are probably the most studied methods at this time [9][10][11].…”