中国物理B ›› 2017, Vol. 26 ›› Issue (2): 25101-025101.doi: 10.1088/1674-1056/26/2/025101

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Effect of electrical discharge in water on concentration of nitrate solution

F Sohbatzadeh, H Bagheri, R Safari   

  1. Department of Atomic and Molecular Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
  • 收稿日期:2016-09-04 修回日期:2016-10-12 出版日期:2017-02-05 发布日期:2017-02-05
  • 通讯作者: F Sohbatzadeh E-mail:F.sohbat@umz.ac.ir

Effect of electrical discharge in water on concentration of nitrate solution

F Sohbatzadeh, H Bagheri, R Safari   

  1. Department of Atomic and Molecular Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
  • Received:2016-09-04 Revised:2016-10-12 Online:2017-02-05 Published:2017-02-05
  • Contact: F Sohbatzadeh E-mail:F.sohbat@umz.ac.ir

摘要: In this work, the effect of electrical discharge on nitrate concentration is considered in aqueous solution. The atmospheric pressure plasma was produced by a high-voltage power supply at 27 kHz using pin-to-pin configuration. Air, argon, and argon/methane mixture were used to study the working gas effect. UV-VIS spectroscopy and ion chromatography were used to analyze the effect of the electrical discharge on nitrate concentration in deionized water. Optical emission spectroscopy (OES) was applied to diagnose active species inside and on the surface of the deionized water solution. The results of the present work showed that the atmospheric pressure electric discharge with air increases nitrate concentration while it remains constant using argon and argon/methane electrical discharges. It was also revealed that in the presence of air, the electrical discharge reduces pH, acidifying the solution and increasing solution conductivity due to production of extra nitrate ions. On the other hand, argon electrical discharge increases pH and conductivity due to production of OH- ion in water.

关键词: electric discharge, nitrate solution, optical spectroscopy

Abstract: In this work, the effect of electrical discharge on nitrate concentration is considered in aqueous solution. The atmospheric pressure plasma was produced by a high-voltage power supply at 27 kHz using pin-to-pin configuration. Air, argon, and argon/methane mixture were used to study the working gas effect. UV-VIS spectroscopy and ion chromatography were used to analyze the effect of the electrical discharge on nitrate concentration in deionized water. Optical emission spectroscopy (OES) was applied to diagnose active species inside and on the surface of the deionized water solution. The results of the present work showed that the atmospheric pressure electric discharge with air increases nitrate concentration while it remains constant using argon and argon/methane electrical discharges. It was also revealed that in the presence of air, the electrical discharge reduces pH, acidifying the solution and increasing solution conductivity due to production of extra nitrate ions. On the other hand, argon electrical discharge increases pH and conductivity due to production of OH- ion in water.

Key words: electric discharge, nitrate solution, optical spectroscopy

中图分类号:  (Electrical properties)

  • 51.50.+v
52.25.-b (Plasma properties) 52.80.Hc (Glow; corona) 52.90.+z (Other topics in physics of plasmas and electric discharges)