Efficient Removal of Azo Dye from Wastewater Using the Non-Toxic Potassium Ferrate Oxidation–Coagulation Process

The wastewater effluents from textile industries contain highly toxic metal complex dyes. For instance, azo dye has received significant attention owing to its toxicity and environmental stability. This study investigated the oxidation coagulation processes effectively remove effluents. Potassium ferrate (K2FeO4) was selected as an oxidant because it a high potential, is environmentally stable, does not generate byproducts. Moreover, combination effect of oxidation. Its performance compared with single process (using NaOCl) FeCl3·6H2O). Based on jar test experiment, optimized pH estimated be 3 optimal dosage 56.4 mg/L for K2FeO4, removed nearly 100% orange II (OD) lissamine green B (LGB). However, removal efficiency decreased when increased 12. In all processes, completed in 5 min reaction. Overall, OD LGB were by NaOCl FeCl3·6H2O. indicates that K2FeO4 outperformed treatment without byproduct production.