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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14003-014003.doi: 10.1088/2058-6272/aa8fc5

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

Characteristics and application of diffuse discharge of water electrode in air

Wenzheng LIU (刘文正), Tahan WANG (王踏寒), Xiaozhong CHEN (陈晓中), Chuanlong MA (马传龙)   

  1. School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

Characteristics and application of diffuse discharge of water electrode in air

Wenzheng LIU (刘文正), Tahan WANG (王踏寒), Xiaozhong CHEN (陈晓中), Chuanlong MA (马传龙)   

  1. School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07

Abstract:

Plasma water treatment technology, which aims to produce strong oxidizing reactive particles that act on the gas–liquid interface by way of discharging, is used to treat the organic pollutants that do not degrade easily in water. This paper presents a diffuse-discharge plasma water treatment method, which is realized by constructing a conical air gap through an uneven medium layer. The proposed method uses water as one electrode, and a dielectric barrier discharge electrode is constructed by using an uneven dielectric. The electric field distribution in the discharge space will be uneven, wherein the long gap electric field will have a smaller intensity, while the short one will have a larger intensity. A diffuse glow discharge is formed in the cavity. With this type of plasma water treatment equipment, a methyl orange solution with a concentration of 10 mg l-1 was treated, and the removal rate was found to reach 88.96%.

Key words: diffuse discharge, water electrode, water treatment, organic pollutants, electric field

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