UV disinfection of drinking water is becoming more common as water utilities attempt to control the formation of disinfection byproducts. While most organisms are readily inactivated by UV, certain viruses require a large fluence for adequate disinfection. In this study, photocatalytic silver doped titanium dioxide nanoparticles were investigated for their capability to enhance the UV disinfection of Bacteriophage MS2. The inactivation kinetics were compared to the base TiO2 material and silver nanoparticles. Inactivation of MS2 was enhanced by doping TiO2 with 8 and 10 wt. % silver, while no enhancement was observed with 4 and 6 wt. % silver. In order to determine the inactivation mechanism, alcohol scavengers were employed to eliminate the effects of hydroxyl free radical. When nAg/TiO2 was used as the catalyst, the alcohols significantly decreased the inactivation rate, but did not completely eliminate the virucidal activity. When P25 TiO 2 was used, no virus inactivation was observed.
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机译:随着自来水公司试图控制消毒副产物的形成,饮用水的紫外线消毒正变得越来越普遍。尽管大多数生物很容易被紫外线灭活,但某些病毒需要大量注量才能进行充分消毒。在这项研究中,研究了光催化银掺杂的二氧化钛纳米颗粒增强噬菌体MS2紫外线消毒的能力。将失活动力学与基础TiO2材料和银纳米颗粒进行了比较。通过掺杂8和10 wt。%的TiO2可以增强MS2的失活。 %银,而在4和6wt。%时未观察到增强。 %银。为了确定失活机理,采用醇清除剂消除羟基自由基的作用。当使用nAg / TiO 2作为催化剂时,这些醇显着降低了灭活速率,但没有完全消除杀灭病毒的活性。当使用P25 TiO 2时,未观察到病毒灭活。
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