Bidirectional mass transfer‐based generation of plasma‐activated water mist with antibacterial properties,Plasma Processes and Polymers

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Bidirectional mass transfer‐based generation of plasma‐activated water mist with antibacterial properties
Plasma Processes and Polymers ( IF 2.9 ) Pub Date : 2020-06-22 , DOI: 10.1002/ppap.202000058
Elena V. Sysolyatina ₁ , Aleksandra Y. Lavrikova ₂ , Roman A. Loleyt ₃ , Elena V. Vasilieva _{1,

4} , Mariam A. Abdulkadieva _{4,

5} , Svetlana A. Ermolaeva ₁ , Aleksey V. Sofronov ₃

Affiliation

Plasma‐activated water mist (PAWM) is obtained by the ignition of plasma within an air–vapor mixture. PAWM demonstrates significant antibacterial properties, decreasing loads of foodborne pathogens by a factor of 35.5 for Listeria monocytogenes, 166 for Salmonella Typhimurium, and 266 for Escherichia coli O157:H7 within 15 s. Bacterial biofilms have a similar species‐dependant susceptibility. Biofilms of L. monocytogenes, Salmonella Typhimurium, and E. coli O157:H7 are destroyed by 44%, 77%, and 71%, respectively, after being treated for 2 min. Obtained results suggest importance of short‐lived radicals, because PAWM condensate is not bactericidal. A new model of PAW generation as a cyclic process of oxidation reactive nitrogen species by reactive oxygen species, which occurs during effective bidirectional mass transfer between heavily humid air and water mist in plasma discharge, is presented.

中文翻译：

基于双向传质的具有抗菌特性的等离子体活化水雾的产生

等离子体活化的水雾（PAWM）是通过在空气-蒸汽混合物中点燃等离子体而获得的。PAWM演示显著的抗菌性能，由35.5对因子减小的食源性致病菌负载李斯特菌，166沙门氏菌鼠伤寒沙门氏菌，和266为大肠杆菌中O157：15秒内H7。细菌生物膜具有相似的物种依赖性敏感性。单核细胞增生李斯特菌，鼠伤寒沙门氏菌和大肠杆菌的生物膜处理2分钟后，O157：H7分别被破坏44％，77％和71％。获得的结果表明，短寿命自由基的重要性，因为PAWM冷凝物不具有杀菌性。提出了一种新的PAW生成模型，该模型是在等离子放电中高湿空气与水雾之间有效双向传质过程中，发生的一种由活性氧物质氧化活性氮物质的循环过程。

更新日期：2020-06-22

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