The fast decolorization of Reactive Red 31(RR31) dye solution by ceric ammonium nitrate (CAN)

Abstract

This paper examines the application of ceric ammonium nitrate (CAN) for fast degradation of Reactive Red 31 (RR31) dye in wastewater treatment. The results indicated that the removal of color and chemical oxygen demand achieved, respectively, was almost 99 and 92%. The parameters such as the amount of the added CAN, the initial pH 2–3, the initial dye concentration (10–1,000 mg/L), and decolorization time have been studied. The results show that CAN treatment of wastewater was more effective than the other advanced oxidation methods. The HPLC performance and UV–vis spectra confirmed the obtained results. The kinetics of decolorization reaction was estimated by half-life method and the order and rate constant of the reaction were evaluated.

Keywords:

• Dye decolorization
• Reactive Red 31
• Ceric ammonium nitrate
• Degradation