Ozone-Based Technologies for Parabens Removal from Water: Toxicity Assessment

Ozone was tested for the detoxification of a mixture of five parabens. A combined O-3/H2O2 process was optimized leading to up to 50% of COD removal in 15min, while less than 50min were needed to achieve total degradation. The toxic effect of the raw mixture and after 15min of treatment by O-3/H2O2 was evaluated using V. fischeri and C. fluminea and it was observed a strong detoxification after 15min of oxidation. Moreover, while the raw effluent promoted the formation of reactive oxygen species in Wistar rat brain slices, no changes were observed after the O-3/H2O2 treatment.