This study investigates the sonolysis of Brilliant Green dye in aqueous solution, focusing on the effects of varying concentrations of hydrogen peroxide (H2O2) and the use of TiO2 and ZnO as photocatalysts. The degradation efficiency of the dye was analyzed through advanced oxidation processes (AOPs), including sonolysis alone, as well as Fenton and photo-Fenton reactions under ultrasonic radiation. Kinetic studies revealed that the degradation process follows a first-order mechanism, with correlation coefficients (R²) of 0.9852 and 0.9918 for two different H2O2 concentrations. The findings indicate that the AOP methods employed are effective for dye removal, with the photo-Fenton process under ultrasound demonstrating the highest degradation efficiency. Additionally, this research highlights the potential for AOPs to convert azo dyes into non-toxic end products, providing a promising avenue for wastewater treatment applications. Further exploration of the degradation mechanisms and byproducts generated will enhance the understanding of these processes and their practical implications.