Table 8 Degradation of different types of organic pollutants in aqueous solutions using US/S2O8 2− process
compound Concentration (mg/L) operating conditions Summary of results reference
Tetracycline 100 [S2O8 2−] = 200 mM; US = 80 W, 20 KHz; pH = 3.7; T = ambient More than 51 % degradation after 120 min. Hou et al. [48]
Trichloroethane 50 [S2O8 2−] = 0.94 mM US = 400 kHz, 100 W pH = 7; T = 20 ± 2 °C 100 % degradation after 120 min. Li et al. [42]
Perfluorooctanoic acid 50 [S2O8 2−] = 46 mM US = 150 W, 40 KHz pH = 4.3: T = 25 °C More than 98 % degradation after 120 min. Lin et al. [52]
2,4 Dichlorophenol 50 [S2O8 2−] = 4 Mm US = 40 KHz, pH = 3; T = 30 °C More than 95 % degradation after 60 min. Seid Mohammai [74]
Acid Orange 7 30 [S2O8 2−] = 1.25 Mm US = 100 W, 20 kHz pH = 5.8; T = ambient More than 10 % degradation after 20 min. Wang et al. [75]
Tetracycline 30 [S2O8 2−] = 4 Mm US = 500 W, 35 KHz pH = 10; T = 25 ± 2 °C More than 95 % degradation, COD and TOC removal of 72 % and 59 % after 120 min Present study