高电压技术2023，Vol.49Issue(12)：5270-5281,12.DOI:10.13336/j.1003-6520.hve.20221668
空气等离子体射流特性及其活化水灭菌效果
Characteristics of Air Plasma Jet and Inactivation Efficacy of Plasma Activated Water
摘要
Abstract
Plasma-activated water(PAW)has a broad application prospect in the fields of medicine,food industry,and agriculture.In this paper,a coaxial needle-cylinder electrode,driven by high-frequency AC high voltage,was used to generate air plasma jet to prepare PAW.The shape,electrical and optical characteristics of air plasma jet under various electrode arrangements and air flows,the physical and chemical properties and inactivation efficacy of PAW were inves-tigated.The results show that,when the air flow is lower than 5 L/min,which means laminar flow,the jet length and discharge power will increase with the air flow.When the air flow is higher than 5 L/min,changing to turbulent flow,the jet length and discharge power will decrease.Besides,the power will decrease slightly when contacting the liquid surface.Optical emission spectrum shows that the vibration temperature of air plasma jet is higher than other discharge patterns.Activation of deionized water can reduce its pH value and increase its oxidation reduction potential and electrical conduc-tivity.PAW shows better inactivation efficacy on bacteria with the increase of activation time and reduces over 90％microorganism from infected grape leaves,whereas,its inactivation ability decreases significantly after placing at room temperature for one hour.This study provides a reference for the field application of air plasma jet and PAW.关键词
大气压低温等离子体/空气等离子体射流/等离子体活化水/大肠杆菌/金黄色葡萄球菌/灭活Key words
atmospheric pressure low-temperature plasma/air plasma jet/plasma-activated water/Escherichia coli/Staphylococcus aureus/inactivation引用本文复制引用
赵航,孙宇豪,张波,常正实,张冠军..空气等离子体射流特性及其活化水灭菌效果[J].高电压技术,2023,49(12):5270-5281,12.基金项目
陕西省重点研发计划(2021NY-039)；广东省重点研发计划(2018B020239001).Project supported by Key R&D Program of Shaanxi Province(2021NY-039),Key R&D Program of Guangdong Province(2018B020239001). （2021NY-039）
