A solution of 30 mg of each dye (Acid Orange 61, Acid Red
97 and Acid Brown 425) in Milli-Q water was introduced into the
cylindrical reactor and H2O2 was added to obtain a final concentration
of 0.05 M. The final sample volume was 0.5 L. A total of 23
samples of 5 mL of the degradation solution were taken at the
beginning of the experiment (t¼0 min) and every 2 min throughout
the degradation time (t¼44 min). The UV–vis-DAD and 1
H-NMR spectra were recorded