Degradation of reactive brilliant red K-2BP in aqueous solution using swirling jet-induced cavitation combined with H2O2.

The degradation of reactive brilliant red K-2BP (K-2BP) in aqueous solution by using swirling jet-induced cavitation, ultrasonic cavitation, and swirling jet-induced cavitation combined with H2O2, ultrasonic cavitation combined with H2O2 was investigated. An obvious synergetic effect between hydrodynamic cavitation and H2O2 was found and a variety of reaction parameters were investigated for the degradation of K-2BP. It was found that the degradation of K-2BP by hydrodynamic cavitation combined with H2O2 follows a pseudo-first-order kinetics. Higher temperature of medium, higher-pressure of fluid and higher concentration of H2O2 are favorable for the degradation of K-2BP, and lower medium pH, lower initial dye concentrations also favored K-2BP degradation. The degradation mechanism of reactive brilliant red K-2BP also discussed with the UV–Vis spectra of the dye solution at different degradation time.