Removal efficiency of different UV-oxidation systems and toxicological evaluation of pharmaceuticals before and after the oxidative treatment (original) (raw)

Abstract

Pharmaceuticals and their metabolites enter the hydrological cycle mainly through hospital effluents and private households. They were detected in surface and ground water in concentrations to μg/L and even after the water treatment process in drinking water. To gain biologically and chemically save conditions in aquatic systems, as required by the EU Water Framework Directive, advanced oxidation processes (AOP: ozone, UV/H2O2) are the only conceivable possibility to remove these persistent organic substances from waste water. However, water treatment plants are not designed for the complete mineralization of these substances, so that oxidation by-products occur, whose chemical and toxicological properties are often unknown. Therefore, it is necessary to complement the oxidative processes by toxicological analyses. In this study, different UV-oxidation systems with and without H2O2 were tested to optimize the elimination of pharmaceuticals, and replenished with toxicological investi...

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