A method utilizing UV 222 / Cl coupling UV 222 Sulfite oxidation-reduction technology is a new process for efficiently degrading pollutants and reducing the generation of disinfection byproducts.

Abstract

This invention discloses a method utilizing UV 222 / Cl coupling UV 222 / Sulfite redox technology is a novel process for efficiently degrading pollutants and reducing the generation of disinfection byproducts. The process includes the following steps: For the first time, a safer, biocompatible KrCl excimer lamp (far-UV, UV) is used as the light source. 222 ) to replace traditional low-pressure mercury lamps (LP-UV); with UV 222 As a light source, NaClO acts as an oxidant to produce ·OH and active chlorine substances (RCS) such as Cl· and Cl. 2‑ • and ClO· and other active free radicals degrade pollutants and inactivate pathogens; coupled with UV 222 / Sulfite advanced reduction process generates hydrated electrons (e aq — ), H·and SO 3 · — The free radicals further reduce and remove recalcitrant pollutants in water, and reduce the large amount of disinfection byproducts generated in traditional UV chlorination treatment processes. The process proposed in this invention can not only efficiently remove recalcitrant micropollutants in water while saving costs, but also reduce the generation of disinfection byproducts during UV chlorination treatment, achieving the key goals of high pollutant removal efficiency and low disinfection byproduct generation.