Effects of gas sparging and mechanical mixing on sonochemical oxidation activity.

ABSTRACT: The effects of air sparging (0-16 L min^-1) and mechanical mixing (0-400 rpm) on enhancing the sonochemical degradation of rhodamine B (RhB) was investigated using a 28 kHz sonoreactor. The degradation of RhB followed pseudo first-order kinetics, where sparging or mixing induced a large sonochemical enhancement. The kinetic constant varied in three stages (gradually increased → increased exponentially → decreased slightly) as the rate of sparging or mixing increased, where the stages were similar for both processes. The highest sonochemical activity was obtained with sparging at 8 L min^-1 or mixing at 200 rpm, where the standing wave field was significantly deformed by sparging and mixing, respectively. The cavitational oxidation activity was concentrated at the bottom

SUBMITTER: Choi J 

PROVIDER: S-EPMC7786622 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature