The physical and chemical properties have significant differences for the positive and negative charged particles generated by discharge.In this work,a positive and negative corona discharge system was established,and two discharge reactors for charged particles restraining and acting were designed by a needle electrode covered with a quartz tube and a plate electrode filled with water.The corona discharges happened within the needle-plate electrodes were excited by a positive and negative high voltage source,and the characteristics of both water volatilization and oxides generation were examined within influence of the distances of both quartz tube inside and outside.The results show that the characteristics of both the water volatilization and oxides generation can be affected by the distances of both quartz tube inside and outside.When the distances of tube inside were increased from 5.00 to 13.00 mm,the water volatilizations decreased under negative corona,and increased firstly and declined immediately under positive corona.The maximum value of the water volatilization appeared in the distances of tube inside with 6.00-8.00 mm.In addition,the concentrations of the HNOx and H2O2 in treated water decreased with increasing the distances of tube inside.Moreover,with increasing the distances of tube outside from 4.00 to 14.00 mm,the change trends of both the water volatilizations and oxides presented the same as the distances of tube inside,and the maximum value of the water volatilization and oxides appeared in the distance of tube outside with about 9.00 mm.Overall,the positive corona can generate more water volatilizations and oxides in water than negative corona,and non H2O2 can be produced by negative corona.The results reflect the difference between positive and negative corona interaction with water,which can provide reference for plasma application.

Ke CHEN;Lianghao WAN;Bingyan CHEN;Tao CHU;Renyue GENG;Deyu SONG;Xiang HE;Wei SU;Cheng YIN;Minglei SHAN;Yongfeng JIANG

College of Science,Hohai University,Nanjing 210098,People's Republic of China;Nanjing Suman Plasma Science and Technology Co.,Ltd,Nanjing 211162,People's Republic of China;Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology,Changzhou 213022,People's Republic of China;College of Mechanical and Electrical Engineering,Hohai University,Nanjing 210098,People's Republic of China

等离子体科学和技术（英文版）

[1]Ke CHEN;Lianghao WAN;Bingyan CHEN;Tao CHU;Renyue GENG;Deyu SONG;Xiang HE;Wei SU;Cheng YIN;Minglei SHAN;Yongfeng JIANG-.Characteristics of water volatilization and oxides generation by using positive and negative corona)[J].等离子体科学和技术（英文版）,2022(04):61-70

volatilizations,HNOx

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