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

Enhancement and Mechanism of Rhodamine B Decomposition in Cavitation-Assisted Plasma Treatment Combined with Fenton Reactions

“…Potassium iodide reacts with hydrogen peroxide when ammonium molybdate and vanillin acid are present, yielding iodovanillic acid as detected by UV absorption at 352 nm [14]. Details of the experimental setup have been reported in our previous papers [9,10]. Therefore, only a brief explanation on the setup will be given here.…”

“…In the next step, it was shown that the use of gas injection in the ACAP reactor offers a promising improvement in the process efficiency, which is especially pronounced when argon or oxygen in injected at higher flow rates. This is achieved through the dissolution of gas introduced into the solution, which results in the reduction of the required breakdown voltage and improvement in plasma and cavitation generation [10].…”

“…Based on the above, the goal of this study was to investigate the effects of Fenton reactions on the efficiency of rhodamine B degradation when its aqueous solution was treated in the ACAP reactor, which combines acoustic cavitation, high-voltage plasma discharge, and gas (argon) injection. The selection of argon for gas injection was based on the results of our previous studies [9,10], which revealed that argon injection enhances RhB decomposition efficiency significantly. However, even in the current case, it was difficult to achieve adequately high decomposition efficiency in a short treatment time.…”

Ultrasound‐Assisted Preparation and Performance Regulation of Electrocatalytic Materials

“…This cavitation effect serves to achieve uniform medium mixing and enhance reaction rates. [75][76][77][78] The implosion of cavitation bubbles (with a lifespan of 0.1 μs) generates localized temperatures of approximately 5000 K and pressures of about 200 MPa, providing energy for the formation of nanoparticles. The cooling rate during this process reaches 109 K s À 1 , resulting in several orders of magnitude increase in the rate of precursor nucleation.…”

“…In a liquid medium, they propagate through the surrounding liquid, giving rise to a phenomenon known as the “cavitation effect,” which involves the generation, development, and sudden collapse of minuscule bubble nuclei in the liquid. This cavitation effect serves to achieve uniform medium mixing and enhance reaction rates [75–78] . The implosion of cavitation bubbles (with a lifespan of 0.1 μs) generates localized temperatures of approximately 5000 K and pressures of about 200 MPa, providing energy for the formation of nanoparticles.…”