Generation of reactive species in atmospheric pressure dielectric barrier discharge with liquid water  

作　　者：张泽龙 沈洁 程诚 许子牧 夏维东 

机构地区：[1]Department of Thermal Science and Energy Engineering, University of Science and Technology of China [2]Institute of Plasma Physics, Chinese Academy of Sciences [3]Anhui Province Key Laboratory of Medical Physics and Technology, Center of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences [4]School of Resources and Environmental Engineering, Hefei University of Technology

出　　处：《Plasma Science and Technology》2018年第4期57-62,共6页等离子体科学和技术（英文版）

基　　金：jointly supported by the Science Foundation of the Institute of Plasma Physics, the Chinese Academy of Sciences (No. DSJJ-14-YY02);National Natural Science Foundation of China (Grant Nos. 11475174 and 51777206)

摘　　要：Atmospheric pressure helium/water dielectric barrier discharge（DBD） plasma is used to investigate the generation of reactive species in a gas–liquid interface and in a liquid. The emission intensity of the reactive species is measured by optical emission spectroscopy（OES）with different discharge powers at the gas–liquid interface. Spectrophotometry is used to analyze the reactive species induced by the plasma in the liquid. The concentration of OH radicals reaches 2.2 μm after 3 min of discharge treatment. In addition, the concentration of primary longlived reactive species such as H;O;, NO;and O;are measured based on plasma treatment time.After 5 min of discharge treatment, the concentration of H;O;, NO;, and O;increased from 0 mg?·?L;to 96 mg?·?L;, 19.5 mg?·?L;, and 3.5 mg?·?L;, respectively. The water treated by plasma still contained a considerable concentration of reactive species after 6 h of storage. The results will contribute to optimizing the DBD plasma system for biological decontamination.Atmospheric pressure helium/water dielectric barrier discharge(DBD) plasma is used to investigate the generation of reactive species in a gas–liquid interface and in a liquid. The emission intensity of the reactive species is measured by optical emission spectroscopy(OES)with different discharge powers at the gas–liquid interface. Spectrophotometry is used to analyze the reactive species induced by the plasma in the liquid. The concentration of OH radicals reaches 2.2 μm after 3 min of discharge treatment. In addition, the concentration of primary longlived reactive species such as H_2O_2, NO_3^- and O_3 are measured based on plasma treatment time.After 5 min of discharge treatment, the concentration of H_2O_2, NO_3^-, and O_3 increased from 0 mg?·?L^(-1) to 96 mg?·?L^(-1), 19.5 mg?·?L^(-1), and 3.5 mg?·?L^(-1), respectively. The water treated by plasma still contained a considerable concentration of reactive species after 6 h of storage. The results will contribute to optimizing the DBD plasma system for biological decontamination.

关 键 词：atmosphere pressure dielectric barrier discharge plasma gas–liquid discharge electrical characteristics reactive species 

分 类 号：O53[理学—等离子体物理]