The Role of Mediated Oxidation on the Electro-irradiated Treatment of Amoxicillin and Ampicillin Polluted Wastewater

Catalysts

Pablo Cañizares¹  ManuelA. Rodrigo¹  Cristina Saez¹  MarcosR.V. Lanza²  FernandoL. Silva² 

[1] Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique Costa Novella. Campus Universitario s/n, 13005 Ciudad Real, Spain;Institute of Chemistry of São Carlos, University of São Paulo, P.O. Box 780, 13560-970 São Carlos-SP, Brazil;

关键词: Anodic oxidation;    diamond electrodes;    UV irradiation;    ultrasounds;    amoxicillin;    ampicillin;   

DOI  :  10.3390/catal9010009

来源: DOAJ

【 摘 要 】

In this work, the electrolysis, photoelectrolysis and sonoelectrolysis with diamond electrodes of amoxicillin (AMX) and ampicillin (AMP) solutions were studied in the context of the search for technologies capable of removing antibiotics from liquid wastes. Single-irradiation processes (sonolysis and photolysis) were also evaluated for comparison. Results showed that AMX and AMP are completely degraded and mineralized by electrolysis in both chloride and sulfate media, although the efficiency is higher in the presence of chloride. The effect of the current density on mineralization efficiency is not relevant and this may be related to the role of mediated oxidation. Irradiation by ultraviolet light or ultrasound (US) waves does not produce a synergistic effect on the mineralization of AMX and AMP solutions. This indicates that the massive formation of radicals during the combined processes can favor their recombination to form stable and less reactive species.

【 授权许可】

Unknown