A solar powered handheld plasma source for microbial decontamination applications
A solar powered handheld plasma source for microbial decontamination applications
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DOI：
10.1088/0022-3727/49/35/355203
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发表时间：
2016-09-07
影响因子：
3.4
通讯作者：
Walsh, J. L.
中科院分区：
文献类型：
--
作者：
Ni, Y.;Lynch, M. J.;Walsh, J. L.
据报道，一种完全便携式的大气压空气等离子体系统适用于表面和液体的微生物去污。该设备在静止的空气中工作，包括一个集成电池，该电池由太阳能电池充电，重量不到750克，使其非常适合实验室以外的各种应用。使用粒子成像测速仪来可视化装置周围的空气流，等离子体产生电极的几何配置被增强以诱导大约0.5 m s（-1）的气体流朝向放置在下游的样品，从而改善等离子体产生的反应性物质到样品的运输。采用接种了常见水生生物大肠杆菌和荧光假单胞菌的饮用水样品，对该系统的微生物净化效率进行了评估。发现微生物数量的减少在2-8 log的范围内，并且强烈依赖于等离子体产生条件。
A fully portable atmospheric pressure air plasma system is reported to be suitable for the microbial decontamination of both surfaces and liquids. The device operates in quiescent air, and includes an integrated battery which is charged from a solar cell and weighs less than 750 g, making it highly amenable for a wide variety of applications beyond the laboratory. Using particle imaging velocimetry to visualise air flows around the device, the geometric configuration of the plasma generating electrodes was enhanced to induce a gas flow on the order of 0.5 m s(-1) directed towards a sample placed downstream, thus improving the transport of plasma generated reactive species to the sample. The microbial decontamination efficiency of the system was assessed using potable water samples inoculated with common waterborne organisms Escherichia coli and Pseudomonas fluorescens. The reduction in the number of microorganisms was found to be in the range of 2-8 log and was strongly dependent on the plasma generation conditions.