細管内スパーク放電照射プラズマ処理水の成分経時変化における細管径依存性

The transactions of the Institute of Electrical Engineers of Japan.A Pub Date : 2023-10-01 DOI:10.1541/ieejfms.143.329

Takahiro Bando, Katsunoshin Takahashi, Shusaku Teshima, Toru Harigai, Hirofumi Takikawa, Kentaro Ide, Tomoaki Oishi, Mitsuo Tsume

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Abstract

In recent years, research on the application of plasma treated water to agriculture or medicine has been actively carried out. For further application of plasma-treated water, it is desirable to understand the reaction process and to prepare plasma-treated water of arbitrary rate and concentration. In this study, the plasma treated water prepared by spark discharges in capillary quartz tubes were investigated. The diameter of the capillary tube was changed from 1.0 mm to 3.5 mm, and the change over time of concentrations of NO2-, NO3-, H2O2, and pH were investigated. It was found that the rate of increase in NO2- was suppressed as the diameter of the capillary tube decreased. As a result, the treatment time at pH = 4.6, the treatment time when NO3- starts to increase, and the treatment time when H2O2 starts to decrease, were increased. The reason for the decrease in the rate of increase in NO2- was considered that the generation of NO2 around the plasma was suppressed as the diameter of the capillary tube decreased, and NO2 was less dissolved in water.

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细管内火花放电照射等离子体处理水的成分随时间变化的细管径依赖性

近年来，等离子体处理水在农业或医药中的应用研究得到了积极开展。为了进一步应用等离子体处理水，需要了解反应过程并制备任意速率和浓度的等离子体处理水。研究了在毛细管石英管内火花放电制备等离子体水。将毛细管直径从1.0 mm改变为3.5 mm，观察NO2-、NO3-、H2O2浓度和pH随时间的变化。结果表明，随着毛细管直径的减小，NO2-的增加速率受到抑制。结果表明，pH = 4.6时的处理时间、NO3-开始增加时的处理时间、H2O2开始减少时的处理时间均有所增加。NO2-增加速率下降的原因认为，随着毛细管直径的减小，等离子体周围NO2的生成受到抑制，NO2在水中的溶解量减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The transactions of the Institute of Electrical Engineers of Japan.A

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