The Role of Gas-Liquid Interface in Controlling the Reactivity of Air Dielectric Barrier Discharge Plasma Activated Water

IF 2.6 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL

Plasma Chemistry and Plasma Processing Pub Date : 2024-09-10 DOI:10.1007/s11090-024-10508-1

Zhenyu Zhou, Zhihua Qi, Xu Zhao, Dongping Liu, Weiyuan Ni

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Abstract

Plasma activated water (PAW) has been prepared using atmospheric pressure air dielectric barrier discharge with the bubbling method. This study aims to elucidate the crucial role of gas-liquid interface in determining the physicochemical properties and biological reactivity of PAW, as well as describe the process of mass transfer for reactive oxygen and nitrogen species (RONS) during the PAW generation. Gas-liquid interfacial area is regulated by varying the airflow rate. When the airflow rate increases from 0.5 to 16.0 SLM, the concentrations of \(\:\text{N}{\text{O}}_{\text{2}}^{\text{-}}\), \(\:\text{N}{\text{O}}_{\text{3}}^{\text{-}}\), \(\:{\text{O}}_{\text{3}}\) and activated oxygen in PAW increase significantly, and the water-activated time for complete E. coli inactivation can be shortened from more than 320 s to 40 s. The numerical simulation result shows that when the airflow rate increases from 0.5 to 16.0 SLM, the gas-liquid interfacial area increases from 0.014 to 0.3 m²/600 mL. The analysis shows that the dependence of the chemical reactivity and the biological reactivity on the interface area is mainly attributed to the change of the mass flux with the interface area.

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气液界面在控制空气介质阻挡放电等离子活化水反应性中的作用

等离子体活化水（PAW）是利用常压空气介质阻挡放电气泡法制备的。本研究旨在阐明气液界面在决定等离子活化水理化性质和生物反应活性方面的关键作用，并描述等离子活化水生成过程中活性氧和氮物种（RONS）的传质过程。气液界面面积是通过改变气流速率来调节的。当气流速率从 0.5 增加到 16.0 SLM 时，PAW 中的（\:\text{N}\text{O}}_{\text{2}}^{\text{-}}\）、（\:\text{N}\text{O}}_{\text{3}}^{\text{-}}\）、（\:\text{O}\text{3}}^{\text{-}}\）和活性氧的浓度会显著增加，大肠杆菌完全灭活的水活化时间也会增加。数值模拟结果表明，当气流速率从 0.5 SLM 增加到 16.0 SLM 时，气液界面面积从 0.014 m2/600 mL 增加到 0.3 m2/600 mL。分析表明，化学反应活性和生物反应活性与界面面积的关系主要归因于质量通量随界面面积的变化。

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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.