一种光催化消毒机的消毒效果及其影响因素研究  

Study on the disinfection effect and influencing factors of a photocatalytic disinfection machine

作　　者：王妍彦[1] 张宝莹[1] 张流波[1] 沈瑾[1] WANG Yan-yan;ZHANG Bao-ying;ZHANG Liu-bo;SHEN Jin(National Institute of Environmental Health,Chinese Center for Disease Control and Prevention,Beijing 100021,China)

机构地区：[1]中国疾病预防控制中心环境与健康相关产品安全所,北京100021

出　　处：《中国消毒学杂志》2024年第6期401-403,407,共4页Chinese Journal of Disinfection

基　　金：中华预防医学会消毒科研项目(XD2022-Y-01)。

摘　　要：目的研究一种光催化消毒机在试验条件下对气雾室内空气和物体表面的消毒效果及影响因素。方法采用空气消毒模拟现场试验和载体定量杀灭试验方法,观察某光催化消毒机对气雾室空气、布片及平板载体的消毒效果;采用平板染菌比较各组菌落数方法,探索空气中是否有消毒因子产生。结果该光催化消毒机主要消毒因子为二氧化钛,并辅以铑和银等金属作为光催化剂,在宽光谱紫外线照射和循环风条件下,作用30min对空气中白色葡萄球菌杀灭率达99.90%以上。提高循环风量,作用2h对布片上的金黄色葡萄球菌杀灭率为38.36%,未达到消毒效果;作用4、6和8 h对平板上的金黄色葡萄球菌杀灭率分别为93.17%、95.36%和97.06%。结论该光催化消毒机对气雾室内空气有较好的消毒效果,消毒效率与循环风量正相关。Objective To study the disinfection effect and influencing factors of a photocatalytic disinfection machine on the air and surface of objects in an mist chamber under experimental conditions.Methods Air disinfection simulation field experiments and carrier quantitative killing test methods were used to observe the disinfection effect of a certain photocatalytic disinfection machine on laboratory air,fabric,and flat carrier.The method of comparing the number of bacterial colonies in each group using plate staining was used to explore whether there are disinfection factors produced in the air.Results The main disinfection factor of this photocatalytic disinfection machine was titanium dioxide,supplemented by metals such as rhodium and silver as photocatalysts.Under broad-spectrum ultraviolet irradiation and circulating wind conditions,the killing rate of Staphylococcus albus in air reached over 99.90%after 30 min of disinfection.Increasing the circulating air volume to 2 h,resulted in a 38.36%killing rate of Staphylococcus aureus on the fabric,but did not achieve the disinfection effect.The killing rates of Staphylococcus aureus on the agar plate after 4,6,and 8 h of disinfection were 93.17%,95.36%,and 97.06%,respectively.Conclusion The photocatalytic disinfection machine has a good disinfection effect on air in aerosol chamber,and the disinfection efficiency is positively correlated with the circulating air volume.

关 键 词：光催化剂 紫外线 空气消毒 消毒效果 

分 类 号：R187.4[医药卫生—流行病学]