Abstract

Hybrid photochemical methods are considered for water disinfection in which treatment with ultraviolet (UV) and ultrasonic (US) radiations are combined (US/UV) and applied consecutively or simultaneously; the use of catalysts is also included. The literature survey shows that inactivation of pathogenic microorganisms in aquatic media by high-frequency US (>100 kHz) has not been studied adequately, whereas only low-frequency (<100 kHz) US and low-pressure mercury vapor lamps (254 nm) were used in hybrid US/UV methods. Irradiation with high-frequency US generates reactive oxygen species (primarily hydroxyl radicals) in greater proportions, and a synergistic effect is observed when UV irradiation is included in treatment. Therefore, the use of high-frequency US and mercury-free UV sources in hybrid oxidizing systems, including those based on Fenton-like processes, is promising for intensifying disinfection processes and improving their effectiveness.

中文翻译：

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超声和紫外线辐射在水消毒混合方法中的应用

摘要

对于水消毒，可以考虑采用混合光化学方法，其中将紫外线（UV）和超声波（US）辐射结合在一起（US / UV）并相继或同时应用。还包括催化剂的使用。文献调查表明，高频（> 100 kHz）灭活水介质中的病原微生物尚未得到充分研究，而只有低频（<100 kHz）超声和低压汞蒸气灯（254 nm）灭活了。用于混合US / UV方法。高频US辐照会产生更大比例的活性氧（主要是羟基），当在治疗中加入UV辐照时，可以观察到协同作用。因此，在混合氧化系统中使用高频美国和无汞紫外线源，