Study on degradation of chloramphenicol by H2O2/PMS double-oxidation system catalyzed by pipe deposits from water networks

The overuse of antibiotics leads to the emergence of resistant bacteria and antibiotic resistance genes in drinking water distribution system, which destroys the balance of the ecosystem, affects water quality and poses a threat to human health. In this study, the pipe deposits from water networks can be used as catalysts for the Fenton-like system. In this paper, H2O2/peroxymonosulfate (PMS) double-oxidation system was constructed. With the assistance of hydroxylamine, the deposits of the actual water networks was used as catalysts to degrade chloramphenicol (CAP). By adding different deposits components into the catalytic oxidation system, it was found that the removal effect of CAP was different when adding different components into the system. Furthermore, the best experimental conditions were obtained by analyzing different influencing factors. Finally, we analyzed the kinetics of catalytic degradation of CAP by actual pipe network deposits, constructed the degradation model and explored the reaction mechanism. The purpose of this study is to effectively use the deposits in the pipeline to remove pollutants and realize resource utilization. The results could provide a new idea for dealing with antibiotic pollution in water body and provide a theoretical basis for the safety of water quality in drinking water distribution system.