Efficient sonocatalytic degradation of orange II dye and real textile wastewater using peroxymonosulfate activated with a novel heterogeneous TiO2–FeZn bimetallic nanocatalyst

TiO2–FeZn nanocatalyst combined with sonolysis were used to activate peroxymonosulfate (PMS) as a highly efficient advanced oxidation process (US/TiO2–FeZn/PMS) for the decoloration of orange II dye (OII) and real textile wastewater. The characterization as-synthesized NPs was performed by SEM, FTIR, EDX XRD analyses. Optimal experimental conditions operational parameters obtained: pH = 3, 15 mg/L initial OII concentration, 0.2 g/L PMS, 0.7 dosing, 300 W ultrasonic power. decolorization observed increase increasing dose power, decreasing (under acidic conditions). Under optimal conditions, COD removal wastewater 99.9% 74.6%, respectively, at 40 min. TiO2–FeZn/PMS/US novel exhibited higher (95%) than TiO2 NPs/PMS/US (54%). efficiency different processes decreased in following order: TiO2–FeZn/US/PMS > TiO2–FeZn/PMS TiO2–FeZn/US /US/PMS US/PMS PMS US. recyclability study revealed that could be reused up three consecutive cycles. current US/nanocatalyst/PMS system concluded an efficient, reusable stable dyes.