Conditions     CODdis removal     Color removal Aromatic amines removal       Phenol removal   H2O2a     OH•a    H2O2a     OH•a    H2O2a         OH•a    H2O2a        OH•a H2O2 concentration (mg/L) in deionized water (60°C) at pH=7.0 at the beginning 177 0 177 0 0 0 209 0 H2O2 concentration (mg/L) in deionized water (60°C) at pH=7.0 after 150 min ultrasound time 176 0 176 0 0 0 198 0 H2O2 concentration (mg/L) in OMW (60°C) at pH=5.4 at the beginning   34 1*10-92   49 1*10-82 175 1*10-272   98 25*10-82 H2O2 concentration (mg/L) in OMW (60°C) after 30 min ultrasound time at pH=5.4 156 10*10-62 160 1*10-52 174 1*10-262 185 10*10-62 H2O2 concentration (mg/L) in OMW (60°C) after 120 min ultrasound time at pH=5.4   92 13*10-15   73 9*10-12 174 1*10-252 145   2*10-52 H2O2 concentration (mg/L) in OMW (60°C) after 150 min ultrasound time at pH=5.4   11 16*10-7     5 9*10-5 173 1*10-242   14 43*10-7 a Concentration (mg/L)

Table 4: H2O2 and OH• ion concentrations in the OMW at 60°C, after 30, 120 and 150 min ultrasound time, at an initial CODdis concentration=109444 mg/L, at an initial color concentration=99.81/m and at an initial TAAs concentration=1990 mg/L, respectively, at pH=5.4 at ultrasound power=640 W and ultrasound frequency=35 kHz (n=3, mean values).