Influence of Potable Water Origin on the Physicochemical and Antimicrobial Properties of Plasma Activated Water
Influence of Potable Water Origin on the Physicochemical and Antimicrobial Properties of Plasma Activated Water
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DOI：
10.1007/s11090-021-10221-3
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发表时间：
2021-12
影响因子：
3.6
通讯作者：
S. Simon;Breno Salgado;M. Hasan;M. Sivertsvik;E. N. Fernandez;J. Walsh
中科院分区：
文献类型：
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作者：
S. Simon;Breno Salgado;M. Hasan;M. Sivertsvik;E. N. Fernandez;J. Walsh
冷气体等离子体和水之间的相互作用产生等离子体活化液体，一种富含高活性化学物质的溶液。这种液体由于其强大的抗微生物特性和易于生产而引起了相当大的关注。在这篇文章中，空气等离子体被用来激活来自五个不同国家的饮用水样品，包括英国，法国，挪威，斯洛文尼亚和巴勒斯坦。所有水样的初始pH值范围为7.9至8.2，在血浆活化后，英国和挪威的水样pH值低于3，而法国和巴勒斯坦的水样pH值稳定在8。所有样品中NO3−的浓度都有所增加，在血浆暴露25分钟后达到最大浓度3 mM;而NO2−的浓度与暴露时间呈非线性关系，暴露25分钟后达到10至25 µM。为了证明水源对每种溶液抗菌潜力的影响，考虑了金黄色葡萄球菌和大肠杆菌的灭活。发现来自英国的活化水能够实现> 6个对数减少，而来自巴勒斯坦的水仅能够实现0.4个对数减少，尽管两种液体接受相同的血浆暴露。该研究证明了初始水组成对等离子体活化水平的重要性，表明活化前可能需要额外的纯化步骤以确保有效性和可重复性。
The interaction between a cold gas plasma and water creates a plasma activated liquid, a solution rich in highly reactive chemical species. Such liquids have garnered considerable attention due to their powerful antimicrobial properties and ease of production. In this contribution, air plasma was used to activate potable water samples from five different countries, including the UK, France, Norway, Slovenia and Palestine. All water samples had an initial pH in the range of 7.9 to 8.2, following plasma activation samples from the UK and Norway reached a pH below 3, whereas water from France and Palestine remained stable at 8. The concentration of NO3−increased in all samples, reaching a maximum concentration of 3 mM after 25 min plasma exposure; whereas the concentration of NO2−showed a non-linear dependence with exposure time, reaching between 10 and 25 µM after 25 min of exposure. To demonstrate the impact of water origin on the antimicrobial potential of each solution, the inactivation ofStaphylococcus aureusandEscherichia coliwas considered. It was found that activated water from the UK was capable of achieving > 6 log reduction, whereas water from Palestine was only able to achieve a 0.4 log reduction, despite both liquids receiving an identical plasma exposure. The study demonstrates the importance of initial water composition on the level of plasma activation, indicating that additional purification steps prior to activation may be necessary to ensure efficacy and repeatability.