Sonochemical degradation of Basic Red 29 in aqueous media

Authors : ZINEB BOUTAMINE, SLIMANE MEROUANI, OUALID HAMDAOUI

Pages : 99-115

View : 12 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this work, the degradation of Basic Red 29 insert ignore into journalissuearticles values(BR29);, an azo dye, was investigated using a high-frequency ultrasonic reactor insert ignore into journalissuearticles values(300 kHz);. The influence of several parameters such as initial substrate concentration insert ignore into journalissuearticles values(5--200 mg L$^{-1});$, pH insert ignore into journalissuearticles values(3-10.1);, ultrasonic power insert ignore into journalissuearticles values(20-80 W);, and nature of the dissolved gas insert ignore into journalissuearticles values(Ar, air, and N$_{2});$ on the degradation of BR29 was assessed. Additionally, the impact of natural matrices insert ignore into journalissuearticles values(seawater and natural and river waters); on the degradation rate of BR29 was clarified. Degradation experiments with radical scavengers, tert-butyl alcohol and glucose, showed that BR29 degraded mainly through HO$^{\bullet }$ radical attack at the gas/liquid interface of the cavitation bubbles. The degradation of the dye was strongly sensitive to the operational conditions. The natural matrices enhanced the degradation of the dye. Ultrasonic mineralization and oxidation of the dye solution was significantly enhanced by addition of a low quantity of Fe$^{2+}$ insert ignore into journalissuearticles values(15 mg L$^{-1});$.
Keywords : Ultrasonic degradation, Basic Red 29, HO ^ ullet radical, natural matrices, mineralization