Fenton Process Coupled to Ultrasound and UV Light Irradiation for the Oxidation of a Model Pollutant

Figure 4

Normalized concentration profile as a function of pH from acid green 50 (4 × 10⁻⁵ mol L⁻¹) solutions by Fenton process, using 37.4 mg/g Fe₂O₃ catalyst, combined with UV and Us irradiation (catalyst annealed at 500°C). ◆ pH 2, ▲ pH 3, ■ pH 5, and ● pH 7.