Bio-Decontamination of Water and Surfaces by DC Discharges in Atmospheric Air
Bio-Decontamination of Water and Surfaces by DC Discharges in Atmospheric Air
复制标题
通过大气中的直流放电对水和表面进行生物净化
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
L. Šikurová
中科院分区：
文献类型：
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作者：
Z. Machala;B. Tarabová;Michal Pelach;Z. Sipoldova;K. Hensel;M. Janda;L. Šikurová
两种类型的直流驱动大气放电，包括流光电晕和具有有限能量的短高电流脉冲的瞬态火花，用于生物净化被细菌或孢子（鼠伤寒沙门氏菌，蜡样芽孢杆菌）污染的水和各种表面（琼脂板，塑料箔，人类牙齿）。两种放电都产生冷的非平衡等离子体。通过针电极对处理后的水进行电喷涂，从而实现快速高效的生物净化。通过比较直接和间接等离子体效应、细胞膜氧化应激测量和处理水中引起的化学变化的实验，可以评估导致微生物失活的等离子体剂。自由基和活性氧似乎是主要的生物杀灭剂，尽管需要对等离子体诱导的水化学和生物失活过程的时间演化有更深入的了解。
Two types of DC-driven atmospheric air discharges, including a streamer corona and a transient spark with short high current pulses of limited energy, were employed for bio-decontamination of water and various surfaces (agar plates, plastic foils, human teeth) contaminated by bacteria or spores (Salmonella typhimurium, Bacillus cereus). Both discharges generate cold non-equilibrium plasma. The discharges combined with the electro-spraying of the treated water through the needle electrode lead to fast and efficient bio-decontamination. Experiments comparing direct and indirect plasma effects, oxidation stress measurements in the cell membranes, and chemical changes induced in the treated water enable assessment of the plasma agents being responsible for microbial inactivation. Radicals and reactive oxygen species seem to be dominant biocidal agents, although deeper understanding of the plasma-induced water chemistry and of the temporal evolution of the bio-inactivation processes is needed.