[Study on the disinfection effect of high-energy pulsed ultraviolet disinfection equipment on the surface of objects in high-speed railway carriages].

Objective: To evaluate the disinfection effect of high-energy pulsed ultraviolet disinfection equipment in high-speed rail carriages. Methods: Three high-speed rail trains were selected as the research sites in this study. Samples were collected from 180 high-frequency contact points before and after disinfection. The contact points included armrests, tabletops, and grab handles, with a total of 360 samples. A total of three on-site experiments were conducted, using two disinfection methods: 400 mg/L chlorine-containing disinfectant and high-energy pulsed ultraviolet disinfection equipment. The disinfection effects of the two methods were compared across different samples and seats. Results: The bacterial eradication rate of both the 400 mg/L chlorine-containing disinfectant and high-energy pulse ultraviolet disinfection equipment was 100%, with no statistically significant difference observed between the two methods (U=4 018, P=0.892). Similarly, the bacterial eradication rate for high-touch surfaces, including armrests, tabletops, and grab handles, was 100%, with no statistically significant differences detected among these samples (H=4.853, P=0.088). Furthermore, the bacterial eradication rate across different seats was consistently 100%, and the differences among these seats were also not statistically significant (H=9.317, P=0.054). Conclusion: The high-energy pulsed ultraviolet disinfection equipment has a comparable disinfection effect to traditional chlorine-containing disinfectants. High-energy pulsed ultraviolet disinfection equipment can achieve a good disinfection effect across different samples and seats, and has good health economic value and application prospects in the disinfection of closed and unoccupied public environments.