Rapid Inactivation of E. coli by Water Droplet-Tuned Surface Micro-Discharges
Rapid Inactivation of E. coli by Water Droplet-Tuned Surface Micro-Discharges
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通过水滴调谐表面微放电快速灭活大肠杆菌
DOI：
10.1007/s11090-022-10275-x
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发表时间：
2022-08
影响因子：
3.6
通讯作者：
Dongping Liu
中科院分区：
文献类型：
--
作者：
Xi Wang;Zhihua Qi;Zilu Zhao;Yang Xia;Haiyu Li;Haobo Chu;Zhishang Wang;Zongxin Mu;Dongping Liu
本研究采用快速灭活大肠杆菌（E.研究了表面微放电（SMD）等离子体对大肠杆菌（coli）的灭活效果，比较了不同距离（d）条件下，空气中有水滴和无水滴时的灭活效果。比较了SMD的放电电流、放电功率和放电过程的时空变化。在水分散剂存在的情况下，测定了凝结水的pH值、电导率和活性氧和活性氮的浓度。此外，通过对大肠杆菌灭活效果的评价，分析了水蒸气在灭菌过程中的作用。通过气体出口用等离子体流出物处理大肠杆菌。结果表明，放电功率的变化可能不是影响E的主要因素。大肠杆菌在WD调谐空气中的灭活。灭菌结果表明，随着水分的存在，剩余大肠杆菌的对数值增大。当样品表面染有大肠杆菌时，SMD等离子体处理可使样品表面的大肠杆菌在5s内迅速降至0.05。在d = 1.1mm时，接地电极（GND）上的E. coli背衬显著减少。没有WD的线圈存活需要超过30秒或更长时间。这也表明WD调节的SMD可以显著促进与水相关的活性物质的产生，从而导致E.杆菌这些物质可以通过空气或水簇转移到经处理的样品的表面。
In this study, rapid inactivation of Escherichia coli (E. coli) by surface micro-discharge (SMD) plasma is studied by comparing the inactivation effects in air with and without water droplets (WDs) under different distances (d) between the samples and the grounded electrode. The discharge current, discharge power and spatial–temporal developments of SMD are also compared. The pH value, conductivity and the concentrations of reactive oxygen and nitrogen species (RONS) of condensed water are determined with the presence of WDs. In addition, the role of water vapor on the sterilization process is analyzed by evaluating the inactivation efficiency of E. coli treated with plasma effluent through the gas outlet. The measurements imply that the variation in discharge power may not be the main factor affecting E. coli inactivation in WD-tuned air. The results of sterilization display that with the presence of WDs, the log value of remaining E. coli on the surface of the sample can be rapidly reduced to 0.05 in 5 s by SMD plasma treatment as the sample surface stained with E. coli backing on the grounded electrode (GND) at d = 1.1 mm. However, a significant decrease in E. coil survival without WDs takes more than 30 s or longer. It also suggests that WD-tuned SMD can significantly contribute to the generation of reactive species associated with water, thus leading to the rapid inactivation of E. coli. These species may be transferred to the surface of the treated samples through air or water clusters.
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影响因子：
3.6
作者：
Bartis, E. A. J.;Knoll, A. J.;Oehrlein, G. S.
通讯作者：
Oehrlein, G. S.
电极配置对大气压表面介质阻挡空气微放电均匀性的影响
影响因子：
3.2
作者：
Xia Yang;Bi Zhenhua;Qi Zhihua;Ji Longfei;Zhao Yao;Chang Xuewei;Wang Wenchun;Liu Dongping
通讯作者：
Liu Dongping
影响因子：
2.7
作者：
E. Wulff;E. P. Zida;J. Torp;O. Lund
通讯作者：
E. Wulff;E. P. Zida;J. Torp;O. Lund
影响因子：
2.8
作者：
Wu, Songjie;Zhang, Qian;Fang, Jing
通讯作者：
Fang, Jing
影响因子：
3.5
作者：
G. Nayak;Austin J. Andrews;I. Marabella;H. Aboubakr;S. Goyal;B. Olson;M. Torremorell;P. Bruggeman-P.-Bru
通讯作者：
G. Nayak;Austin J. Andrews;I. Marabella;H. Aboubakr;S. Goyal;B. Olson;M. Torremorell;P. Bruggeman-P.-Bru