Abstract
The degradation of methyl violet 2B was efficiently carried out using sonolytic and sonophotocatalytic processes, FePO4 is a heterogeneous catalyst which has already shown its efficiency for the photocatalytic degradation of the earlier mentioned dye was used as a catalyst for the sonolytic process under a constant frequency of 500 kHz, effect of the parameters: pH, catalyst concentration ultrasonic intensity and dye concentration were also studied. The results show that a better degradation occurred under acidic pH (pH 3) with 1 g/L of the catalyst and an ultrasonic power P = 80 W. To further optimize the degradation process, ultrasound was coupled with UV radiation (λ = 254 nm), the dye degradation was improved from 68% using the sonolysis process to 100% using the sonophotocatalytic process with FePO4 as heterogeneous catalyst. Finally, degradation byproducts formed under optimized conditions were identified.
Published Version
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