Sonoelectro-Fenton process: A novel hybrid technique for the destruction of organic pollutants in water

Degradation and Detoxicity of Tetracycline by an Enhanced Sonolysis

“…The pH level of solution is a key parameter affecting the kinetics of the ultrasound/Fe 2+ /H 2 O 2 process and most studies adopted acidic conditions attained satisfactory degradation efficiency (Oturan et al, 2008;Wang and Liu, 2014). Based on pH changing, the nature of organic compound, the scavenge of OH by H + and the solubility of iron can affect the pollutant treatments (Ma, 2012).…”

Sonoelectrochemistry in Environmental Applications

“…For example, the addition of Fe 2+ to a solution containing hydrogen peroxide is known to 'catalyze' the organic compound degradation through the generation of the highly reactive hydroxyl radical (OH • ). The combination of ultrasonic waves, electrochemistry, and Fenton's reagents has been employed as a novel hybrid technique for the degradation of organic pollutants in water [44][45][46]. Powerful oxidizing OH • radicals are produced according to a Fenton-type mechanism, as described in Using this sonoelectro-Fenton (SEF) treatment procedure, the degradation of an organic dye molecule, Meldola Blue, has been studied [44].…”

“…To avoid this problem, Yasman et al [47] studied the use of palladium-based catalysts in the sonoelectrochemical degradation of 2,4-D. Suspensions of finely divided Pd and Fe-Pd Oturan et al [46] also reported the results of the degradation of 2,4-D and other pollutants such as the herbicide 4,6-dinitrocresol and the azo-dye AB by SEF treatment (Figure 4.12). Hydrogen peroxide was produced galvanostatically (50 mM Na 2 SO 4 ) at pH 3, using a carbon felt cathode and continuous air bubbling to ensure oxygen saturation of the solution.…”

Ultrasound in Electrochemical Degradation of Pollutants

“…The efficiency of the SEF process was much higher than the other conventional degradation methods and the required times for the complete degradation were considerably shorter. Oturan et al (2008) also reported the use of sonoelectro-Fenton process for the degradation of organic pollutants in aqueous medium, such as herbicides 4,6-dinitro-o-cresol (DNOC) and 2,4-dichlorophenoxyacetic acid (2,4-D) and the azobenzene (AB) dye. A cylindrical Pt mesh used as anode was centered in the electrolytic cell and surrounded by the carbon-felt cathode.…”