Reactive Oxygen and Nitrogen Species (RONS) Solubility Controlled Activation of Water by Atmospheric Pressure Air Spark Discharge

IF 2.6 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL Plasma Chemistry and Plasma Processing Pub Date : 2024-02-24 DOI:10.1007/s11090-024-10453-z

Zhiguo Zhao, Guoqiang Liu, Guofeng Li, Weiyuan Ni, Dongping Liu

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Abstract

The activation of water by the atmospheric pressure air plasma is involved in the diffusion of reactive oxygen and nitrogen species (RONS) in air and water, their gas-phase and liquid-phase reactions, and their dissolution and evaporation. In this study, by generating the air spark discharge over the surface of water, we have evaluated the chemical and biological reactivities of direct–plasma treatment (DPT) and remote–plasma treatment (RPT) plasma-activated water (PAW) at different water temperatures. We have found that DPT-PAW is much more effective in increasing both the chemical and biological reactivities of PAW than RPT-PAW, and decreasing the water temperature from 40 to 6 °C leads to the rapid activation of water. Our analysis shows that when the water temperature varies from 6 to 40 °C, the activation of water by the air discharge is RONS solubility controlled, and the gas-phase and liquid-phase RONS diffusion and chemical reactions are not the controlling steps during the activation of water. The direct plasma treatment of water at a relatively low temperature contributes to an obvious increase in the RONS solubility, thus a rapid activation of DPT-PAW.

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活性氧和氮物种 (RONS) 溶解度受控的常压空气火花放电活化水作用

摘要大气压空气等离子体对水的活化作用涉及活性氧和氮物种（RONS）在空气和水中的扩散、气相和液相反应以及溶解和蒸发。在这项研究中，通过在水表面产生空气火花放电，我们评估了直接等离子处理（DPT）和远程等离子处理（RPT）等离子活化水（PAW）在不同水温下的化学和生物反应活性。我们发现，DPT-PAW 比 RPT-PAW 能更有效地提高 PAW 的化学和生物反应活性，而将水温从 40 ℃ 降到 6 ℃ 则能使水迅速活化。我们的分析表明，当水温从 6 ℃ 到 40 ℃ 变化时，空气放电对水的活化是由 RONS 溶解度控制的，气相和液相 RONS 扩散和化学反应并不是水活化过程中的控制步骤。在相对较低的温度下对水进行直接等离子处理，可明显提高 RONS 的溶解度，从而快速活化 DPT-PAW。

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来源期刊

Plasma Chemistry and Plasma Processing 工程技术-工程：化工

CiteScore

5.90

自引率

8.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.