Application Study Of Filter Ti/SnO₂-Sb-Ni Electrode In Electricity Catalytic Disinfection Of Swimming Pool Water

With people’s yearning for a healthy life,sports and fitness have become a good choice for people to pursue health and keep fit,and people especially favor exciting sports such as swimming.But people’s standards of environmental quality of sports are also significantly improved.Many swimming pools have been exposed to severe pollution,resulting in serious health problems,so swimming pools’water health and safety have been widely concerned.Nowadays,chlorine disinfectant is mainly used for disinfection in swimming pools.There are two most prominent problems of water safety in swimming pools:inadequate disinfection and disinfection by-products.Therefore,it is urgent to develop a green and safe swimming pool disinfection process.Aiming at the deficiency of existing swimming pool disinfection technology and combining the advantages of electrocatalytic disinfection technology,a new electrochemical disinfection technology based on an electrocatalytic ozone generation electrode was developed.The filter type Ti/SnO₂-Sb-Ni electrode was prepared using the sol-gel method,and a filter type water and electricity catalytic disinfection reactor for the swimming pool was constructed.The materials’surface morphology and crystal structure were characterized by Scanning Electron Microscopy（SEM）and X-Ray Diffraction（XRD）.The ozone generation and disinfection performance of the electrode was evaluated.The electrode prepared under optimized conditions was used to simulate the disinfection experiment of swimming pool water.The effects of different influencing factors on the disinfection performance of simulated swimming pool water and ozone generation performance of electrodes were investigated.The results show that the electrode has the best electrocatalytic ozone and disinfection performance when the electrode doping content is 1.0%and the filtration accuracy of titanium foam substrate is 20μm.The electrocatalytic disinfection performance is the best when the current density is 12.5 m A/cm².However,its disinfection energy consumption is the highest,and the current efficiency of electrocatalytic ozone at 12.5 m A/cm² is lower than that at 10.0 m A/cm².The electrocatalytic ozone and disinfection performance are slightly higher at a 90 mL/min flow rate,but the energy consumption for disinfection is higher at this flow rate.Under 30 mg/L of Total Organic Carbon（TOC）,the electrocatalytic disinfection effect was the worst.With the increase in TOC concentration,electrocatalytic ozone generation and active chlorine performance decreased significantly.There was no significant difference in electrocatalytic disinfection performance between 15℃and 35℃,but the energy consumption was lower at the higher temperature.Further analysis showed that different concentrations of oxidizing substances produced in the electrocatalytic process were the main reason for the difference in the disinfection effect.And from the comparison of the morphology of Escherichia coli before and after disinfection,it can be shown that the destruction of the bacterial structure by ozone,active chlorine,and other oxidizing substances produced in the electrocatalytic process is the main reason for disinfection.