Sonochemical Degradation of Cationic Dye Effect of Potassium Monopersulfate and Operating Parameters

Document Type : Primary Research paper


1 Laboratory of materials chemistry,Department of Chemistry. Faculty of Sciences. University of brother’s Mentouri Constantine - Algeria.

2 Laboratoire de Rhéologie et Procédés, 1301 rue de la Piscine, Domaine Universitaire, BP 53,38041 Grenoble cedex 9, France.


In this work, the sonochemical degradation of Bromocresol Green (BCG), an cationic triphenylmethane dye, in water was investigated. The effects of  additives such as potassium monopersulfate (oxone) was studied. The effects of several operating parameters such as initial BCG concentration, power and solution pH on the degradation of the dye were carried out. The obtained results showed that ultrasound completely destroyed BCG (6 10-5M) after 60 min of sonication. It was found that the initial rate of sonolytic degradation increased with increasing the initial BCG concentration. The degradation rate of the dye increased substantially with increasing power  in the range of 20–80W. The significant degradation was achieved in acidic conditions (pH 2) where the color removal was 99% higher than those observed in higher pH aqueous solutions. The ultrasonic degradation of dye was enhanced by potassium monopersulfarte (oxone) addition. It was found that the degradation of the dye was accelerated with increased concentrations of oxone for a reaction time of 45 minutes.