Ozonation and H2O2/UV treatment of clofibric acid in water: a kinetic investigation.
The presence of pharmaceuticals or their active metabolites in surface and ground waters has been recently reported as mainly due to an incomplete removal of these pollutants in sewage treatment plants (STP). Advanced oxidation processes may represent a suitable tool to reduce environmental release of these species by enhancing the global efficiency of reduction of pharmaceuticals in the municipal sewage plant effluents. The present work aims at assessing the kinetics of abatement from aqueous solutions of clofibric acid (a metabolite of the blood lipid regulator clofibrate) which has been found in surface, ground and drinking waters. Ozonation and hydrogen peroxide photolysis are capable of fast removal of this species in aqueous solution, with an almost complete conversion of the organic chlorine content into chloride ions for the investigated reaction conditions. A validation of assessed kinetics at clofibric acid concentrations as low as those found in STP effluents is presented for both systems.
Dipartimento di Ingegneria Chimica, Facoltà di Ingegneria, Università degli Studi di Napoli Federico II, Piazzale V. Tecchio 80, 80125 Naples, Italy. roberto.andreozzi@unina.it
Roberto
R
Andreozzi
Vincenzo
V
Caprio
Raffaele
R
Marotta
Anita
A
Radovnikovic
D002995:Clofibric Acid / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007220:Industrial Waste; D010126:Ozone / Q000737:chemistry*; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000737:chemistry*; D012722:Sewage / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D004364:Pharmaceutical Preparations; D012722:Sewage; D014874:Water Pollutants, Chemical; D002995:Clofibric Acid; D010126:Ozone; D006861:Hydrogen Peroxide