jailcd2016065: Degradation Kinetics of Ofloxacin in Water by UV/H,0: Process

Abstract

Antibiotics have gained more and more concerns these years. Compared to other means, advanced oxidation process is an effective method to remove antibiotics from water without unnecessary negative effects. This work aims to research the degradation kinetics of quinolone antibiotic -- ofloxacin (OFL) in ultra pure water by UV/H2O2 process and discuss the effect of H2O2 dosage and degradation of OFL in actual waters. The results proved that the degradation process obeyed to the first order kinetic equation, adding low concentration of H2O2 (5µmol/L-0.24mmol/L) efficiently improved the degradation of OFL, while, the degradation of OFL was not further promoted by increasing H2O2 concentration (0.24mmol/L-1mmol/L). We had taken surface water, drinking water and waste water samples, and conducted the UV/H2O2 degradation of OFL, and results showed that the degradation rates in these actual waters were quite lower than that in ultra pure water, due to the existence of hydroxyl radical quencher or UV adsorbing matter. And we also found the differences in degradation rate in actual waters, in DW system, the fastest; in WW system, the slowest. Our research will provide a better way to solve antibiotic pollution in actual water, and also provide technical support for safe water supply.