Decolorization efficiency and kinetics of typical reactive azo dye RR2 in the homogeneous Fe(II) catalyzed ozonation process

Effect of Fe(II) dosage on the decolorization rate constant k2. (CB0 = 0.45 mM, Qg = 12 L h−1, Cg = 10 mg/L, Fe(II) dosage was 0, 0.2, 0.4, 0.9, 1.8, and 3.6 mM, initial pH = 7; T = 298 K.)