Coupled Fenton With Ultrasound Process For Decoloration Of Levafix Blue And Remazol Mix Dyes

Fenton is a kind of Advanced Oxidation Process for wastewater treatment, which reacts to form·OH that has high oxidizing ability. This study mainly uses Fe0 as the resource of Fe2+ coupled with ultrasound to improve the efficiency of Fenton reaction. The data shows that compared with common Fenton process, this process can improve the effectiveness of decoloration of dyes. The objective of this study is to evaluate the effectiveness of using Fenton/Ultrasound for degradation of reactive dyes, i.e., Levafix Blue and Remazol dyes. Remazol Red, Remazol Golden Yellow, and Remazol Navy were used to mimic mixed dye wastewater to evaluate the effectiveness of using Fenton/Ultrasound for degradation of mix dye wastewater. Comparison of different processes, including Fenton, Fenton/US, H2O2/US, Fe(0)/US, and Ultrasonic, the results has shown that a syngistic effecs was found in Fenton/US process. Findings also showed that pH, Fe(0), and H2O2 were the key parameters for decolorations of dyes in the Fenton/US process. The optimum condition for both Levafix Blue and Remazol Mix dyes decoloration in the Fenton/US process is pH 2.5, Fe(0) 0.5 g/L, H2O22.06x10"2 M, and US 120W/L. Under the optimum conditions, the Fenton/US could remove 95% of 50 mg/L Levafix Blue within 10 min. Fenton/US also could remove 96% of 100 mg/L Remazol Mix within 15 min, and the dye laden wastewater has declined from ADMI 4276 to under ADMI 140.