The decolorization of azo dye . reactive orange 16 (RO16) via ferrate(VI) and sono-ferrate(VI) methods, which is the combination of the ferrate(VI) oxidation method with sonication, has been achieved in the present study. The influences of some important operating parameters, which are the initial pH, the concentration of potassium ferrate(VI) (K2FeO4) and the RO16 dye, and ultrasonic density (for only the sono-ferrate(VI) method), on the color removal have been investigated. The optimum conditions have been determined as pH = 7 and [K2FeO4] = 50 mg L−1 for the individual ferrate(VI) oxidation method and pH = 7 and [K2FeO4] = 50 mg L−1 by direct sonication at W mL−1 ultrasonic density and 20 kHz fixed frequency for the sono-ferrate(VI) method. |
