In this study, bench-scale experiments were conducted to examine the UV/H2O2 oxidation of 17α-ethynyestradiol (EE2) in water in a batch operation mode. The EE2 degradation exhibited pseudo-first-order kinetics, and the removal was ascribed to the production of hydroxyl radicals (•OH) by the UV/H2O2 system. Typically, the EE2 oxidation rate increased with increasing UV intensity and H2O2 dose, and with deceasing initial EE2 levels and solution pH. At EE20=650μg/L, UV intensity=154μW/cm2, H2O2=5mg/L, and neutral pH, the UV/H2O2 treatment was able to remove 90% of the EE2 content within 30min. Four anions commonly present in water were found to inhibit EE2 degradation to varying degrees: HCO3->SO42->Cl- >NO3-. Our results demonstrate that the described UV/H2O2 process is an effective method to control EE2 pollution in water.
- Drinking water
- Endocrine disruptor