Production of Alkaline Plasma Activated Tap Water Using Different Plasma Forming Gas at Sub-Atmospheric Pressure

IF 2.6 3区物理与天体物理 Q3 ENGINEERING, CHEMICAL Plasma Chemistry and Plasma Processing Pub Date : 2024-05-10 DOI:10.1007/s11090-024-10464-w

Vikas Rathore, Karaket Watanasit, Suttirak Kaewpawong, Dhammanoon Srinoumm, Arlee Tamman, Dheerawan Boonyawan, Mudtorlep Nisoa

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Abstract

The present study demonstrates the successful production of alkaline plasma-activated tap water (PATW), effectively addressing the challenge of acidity in traditional PATW for a range of applications. Through precise control of plasma-forming gases (oxygen, air, argon) and process parameters, particularly by producing PATW under sub-atmospheric pressure conditions, it becomes possible to shift the pH of acidic PATW towards the alkaline range. This transformation enhances its suitability for applications like agriculture, aquaculture, sterilization, wound healing, disinfection, and food preservation, etc.

The investigation encompassed the characterization of plasma and the identification of various plasma species/radicals. The impact of different plasma-forming gases on the pH of PATW and the concentration of reactive species in PATW was thoroughly analyzed. Plasma generated using oxygen and argon resulted in the production of reducing or alkaline PATW, while the use of air and air-argon mixtures led to an acidic or oxidizing nature.

The study also discussed the stability of nitrate ions, nitrite ions, and hydrogen peroxide in PATW, shedding light on their behavior over varying plasma treatment times and plasma-forming gas. Finally, the investigation explored the effects of gas flow rates, gas pressures, water volume, and plasma discharge powers on the concentration of H₂O₂ in PATW, providing valuable insights into optimizing the production process.

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在亚大气压下使用不同的等离子体形成气体生产碱性等离子体活化自来水

本研究展示了碱性等离子活化自来水（PATW）的成功生产，有效地解决了传统等离子活化自来水在一系列应用中的酸性难题。通过精确控制等离子体形成气体（氧气、空气、氩气）和工艺参数，特别是在亚大气压条件下生产 PATW，可以将酸性 PATW 的 pH 值转变为碱性范围。这种转变提高了其在农业、水产养殖、杀菌、伤口愈合、消毒和食品保鲜等应用领域的适用性。研究还深入分析了不同等离子体形成气体对 PATW 酸碱度和 PATW 中活性物质浓度的影响。研究还讨论了硝酸根离子、亚硝酸根离子和过氧化氢在 PATW 中的稳定性，揭示了它们在不同的等离子处理时间和等离子形成气体中的行为。最后，研究还探讨了气体流速、气体压力、水量和等离子体放电功率对 PATW 中 H2O2 浓度的影响，为优化生产工艺提供了宝贵的见解。

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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.