The UV/H2O2 process based on H2O2 in-situ generation for water disinfection

Abstract

Till now, the unprecedented global spread of novel coronavirus disease (nCOVID-19) threatened human health, economy as well as ecosystem services gravely. An efficient disinfection technology is highly demanded. Ultraviolet (UV)/H2O2 process seems like a potential candidate, in which H2O2 is an indispensable oxidant for HO· species production. In this work, UV/H2O2, which coupled with in-situ generated H2O2, was demonstrated as an effective process for disinfection than UV, which would play a significant role in sterilization and disinfection for water treatment. In addition, we investigated the effects of catalyst layer (CL) calcination on the performance of two-electron oxygen reduction reaction (ORR) for H2O2 generation. It is found that the two-electron ORR activity can be intensified by avoiding calcination of CL, which can be mainly due to much oxygen functional groups (CO and CO) as well as higher conductivity and reaction kinetics.

Keywords

• Disinfectant
• Hydrogen peroxide (H2O2)
• UV
• ORR
• Oxygen functional groups