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This study presents the application of Fenton’s reagent (FR) process for the oxidation of Reactive Blue 221(RB 221) in aqueous solution. The major objective was to investigate the effects of dye, H2O2 and Fe (II) concentrations on percent color (PCR) and TOC (PTR) removal by using a Box-Behnken statistical experiment design (BBSED). Dye, H 2 O 2  and Fe (II) concentrations were chosen as independent variables while the PCR and PTRs were the objective functions. H 2 O 2  and Fe (II) had significant effects on PCR and PTR. Complete decolorization and 42% TOC removal was obtained in 5 and 100 min, respectively. Low levels of H 2 O 2  and Fe (II) resulted in limitation on PCR and PTR, on the other hand high reagent doses caused hydroxyl radical scavenging adversely affecting the oxidation process. Optimum dye/H 2 O 2 /Fe (II) ratio resulting in the highest color (100%) and TOC (42%) removal was determined as 250/650/45 (mg L -1 ) at room temperature (24±2 °C), pH= 3 and 100 min reaction time.

Advanced Oxidation of Reactive Blue 221 by Fenton’s Process