Performance evaluation of US/S2O82− process in the removal of different organics
An overview of performance of US/S2O82− process for removal of different organics along with present study was presented in Table 8. The overview confirm that US/S2O82− process is an attractive alternative technique for degradation of the wide range of organic compounds in aqueous solutions. This process could effectively decomposed organic pollutants in aqueous solution, and the degradation rate depends heavily on the operating conditions, such as physical and chemical characteristics and initial concentration of pollutant, S2O82− concentration, initial pH, reaction time, ultrasound power, ultrasound frequency, and temperature of the medium. Therefore, the various experimental conditions could lead to the various removal efficiencies of organic compounds using US/S2O82− process.
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