Advanced oxidation of preservative agents in H2O2/UVC system – Kinetics study, transformation products and toxicity assessment

All-in-One Continuous Electrochemical Monitoring of 2-Phenylphenol Removal from Water by Electro-Fenton Treatment

“…In this regard, Hou et al reported the adsorption mechanism of 2PP on various zeolites obtaining an adsorption capacity of 299.4 mg/g in a microporous zeolite [17]. Olak-Kucharczyk and co-workers reported the use of H 2 O 2 /UVC process consisting of the in-situ generated hydroxyl radicals, through H 2 O 2 photolysis, as main oxidants; the authors achieved 89 % of total organic carbon reduction after 2 h of reaction [18]. Among the chemical degradation methods of pollutants, heterogeneous electro-Fenton (HEF) processes emerged as an attractive electrochemical mechanism based on the in-situ electrogeneration of H 2 O 2 through a cathodic reduction of O 2 in acidic medium (equation (1)) and the subsequent generation of hydroxyl radicals by the Fenton reaction between the Fe 2+ species (present in solution) and H 2 O 2 , thus generating Fe 3+ (equation ( 2)) which is further reduced on the cathode maintaining the catalytic cycle (equation ( 3)) [19,20].…”