School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 698-805, Republic of Korea.
Chemosphere. 2011 Feb;82(8):1135-40. doi: 10.1016/j.chemosphere.2010.11.036. Epub 2010 Dec 8.
Electrical discharge processes are emerging as water treatment technologies applicable to both the degradation of organic contaminants as well as inactivation of pathogens. Particularly as a disinfection technology, electrical discharge processes do not produce toxic byproducts, and effectively inactivate a wide spectrum of microorganisms by multiple lethal actions generated by the formation of plasma channels. This study demonstrates the inactivation of a virus using the streamer corona discharge process (SCDP) with MS2 phage as a surrogate. A rapid inactivation of MS2 phage (i.e., approximately 4 log inactivation in 5 min) was observed in all experimental runs conducted. Discharge conditions such as applied voltage and storage capacitance significantly affected the inactivation efficiency of MS2 phage, whereas the influence of water quality parameters was minor. In order to elucidate the mechanism of MS2 phage inactivation, potentially lethal factors that can be generated by the SCDP were selected, and their roles in the inactivation of MS2 phage were examined. As a result, effects of UV radiation, chemical oxidants, and pulsed electric fields were found to be insignificant. The shockwave generated upon plasma channel formation appears to be the most important factor responsible for MS2 phage inactivation.
放电过程作为水处理技术，正在崭露头角，适用于有机污染物的降解以及病原体的失活。特别是作为一种消毒技术，放电过程不会产生有毒副产物，并且通过等离子体通道形成产生的多种致死作用，有效地灭活广谱微生物。本研究使用流光电晕放电过程（SCDP）以 MS2 噬菌体作为替代物来证明病毒的失活。在所有进行的实验中，都观察到 MS2 噬菌体的快速失活（即在 5 分钟内约 4 个对数的失活）。施加电压和存储电容等放电条件显著影响 MS2 噬菌体的失活效率，而水质参数的影响较小。为了阐明 MS2 噬菌体失活的机制，选择了可以由 SCDP 产生的潜在致死因素，并研究了它们在 MS2 噬菌体失活中的作用。结果表明，UV 辐射、化学氧化剂和脉冲电场的影响并不显著。在等离子体通道形成时产生的冲击波似乎是导致 MS2 噬菌体失活的最重要因素。
