Sonophotocatalytic treatment of Naphthol Blue Black dye and real textile wastewater using synthesized Fe doped TiO2

This study examines the treatment of Naphthol-Blue-Black (NBB) dye and real textile wastewater through sonophotocatalytic technique. Fe, TiO2 and Fe-TiO2 were synthesized and characterized by SEM, XRD and DRS which revealed its high purity, good doping, nanosize and higher light absorption capacity. The effect of pH, gas content (Ar, O2, air and N2), H2O2 concentration and catalyst loading were examined. The maximum color removal was observed for initial pH 11, argon gas bubble, 44.1 mmol/L H2O2, 3 g/L Fe, 4 g/L TiO2 and 2.2 g/L Fe-TiO2. However, 96% was achieved by sonophotocatalytic process for 2.2 g/L 1:7 Fe:TiO2. Similar methodology for real textile wastewater with Fe-TiO2 (1:7) could remove 91% of TOC.