Oxidation of phenol in wastewater by sonoelectrochemistry

✍ Scribed by F. Trabelsi; H. Aït-Lyazidi; B. Ratsimba; A.M. Wilhelm; H. Delmas; P-L. Fabre; J. Berlan

• Book ID: 103008987
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 449 KB
• Volume: 51
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(96)00043-7

✦ Synopsis

Mass transfer was investigated in ultrasonic reactors by means of the electrochemical method (feri-ferro-cyanide couple, under diffusion limitations). This method allowed for the determination of the active zones in the reactor. The oxidation of a model pollutant, phenol, has been carried out in the previously screened rcactor, with ultrasound alone and with ultrasound associated with electrolysis. With a 20 kHz sonication, the electrochemical oxidation of phenol in NaCI media allows the conversion of 75 % of initial phenol within 10 minutes of treatment. However a toxic intermediate, p.quinone was formed. At 500 kHz a conversion of 95 % of the initial phenol was obtained within the same treatment time, and final products of degradation were acetic and chloroacrylic acids.