A Biphasic Plasma Microreactor for Pollutants Degradation in 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/s11090-024-10503-6

Ghewa Akiki, Stephanie Ognier, Pascal Rajagopalan, Cecilia Devaux, Ichiro Kano, Noelia Merino, Simeon Cavadias, Yann Ratieuville, Xavier Duten, Michael Tatoulian

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Abstract

The combination of plasma technology with microfluidics has gained significant attention in recent years. The unique characteristics of microfluidic chips, such as high surface-to-volume ratio and efficient mass transfer, coupled with plasma’s ability to provide the necessary green energy for the degradation of complex molecules, make this combination promising for water and wastewater treatment applications. A gas/liquid biphasic dielectric barrier discharge (DBD) plasma microreactor powered by a nano-pulsed excitation source, at atmospheric pressure, was used to study the degradation of p-benzoquinone and caffeine in water, chosen as model molecules for water pollution. Based on High Performance Liquid Chromatography (HPLC) analyses, the argon plasma was able to completely degrade both molecules at concentrations 10^− 5, 10^− 4 and 10^− 3 mol/L. At higher concentration (10^− 2 mol/L), the plasma promotes the synthesis of hydroquinone from p-benzoquinone. A 50% mineralization is achieved after plasma for the caffeine in aqueous solution at 10^− 5 M.

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用于降解水中污染物的双相等离子体微反应器

近年来，等离子体技术与微流控技术的结合受到了广泛关注。微流控芯片具有高表面体积比和高效传质等独特特性，而等离子体能够为复杂分子的降解提供必要的绿色能源，因此这种结合在水和废水处理应用中大有可为。在大气压力下，利用纳米脉冲激发源驱动的气/液双相介质阻挡放电（DBD）等离子体微反应器，研究了对苯醌和咖啡因在水中的降解情况。根据高效液相色谱（HPLC）分析，在浓度为 10- 5、10- 4 和 10- 3 摩尔/升时，氩等离子体能够完全降解这两种分子。在较高浓度（10- 2 摩尔/升）下，等离子体能促进对苯醌与氢醌的合成。浓度为 10- 5 毫摩尔/升的咖啡因水溶液经过等离子处理后，矿化度达到 50%。

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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.