Due to industrialization and population growth, water shortage has emerged as a critical global issue. Pollution of existing water supplies is a critical part of this issue, and organic contaminants are one of the main causes of water pollution. The non-thermal plasma-based advanced oxidation process (AOP) is one of the most widely studied and best developed processes owing to its simple structure and ease of operation. In this study, a plasma-based AOP was stably generated using submerged multi-hole dielectric barrier discharge (DBD) and added to an aqueous solution. Using a plasma system, the complexity of the process for generating hydroxyl radicals (OH) can be simplified by allowing ozone, hydrogen peroxide, ultraviolet light (UV), and OH to be generated simultaneously in one device. The electrical properties and concentrations of the active species were analyzed to establish optimal plasma operating conditions. Among the organic pollutants, methylene blue (MB) and methyl orange (MO) were selected as experimental targets because they are representative cationic thiazine and azo dyes, respectively. The results were analyzed by measuring the absorbance of UV–Vis, total organic carbon (TOC), chromaticity, and changes in solution properties. The effects of hydroxyl radical (OH) scavengers (D-mannitol) on the MB and MO degradation rates were also investigated. Based on these results, degradation mechanisms of MB and MO are proposed. After 3 min of plasma treatment, the concentration, chromaticity, and TOC of MB and MO rapidly decreased. Consequently, we believe that plasma-based AOP using submerged multi-hole DBD has advantages as an alternative technology for treating organic pollutants.

由于工业化和人口增长，水资源短缺已成为一个关键的全球性问题。现有供水的污染是这个问题的关键部分，有机污染物是造成水污染的主要原因之一。基于非热等离子体的高级氧化工艺（AOP）由于其结构简单和易于操作而成为研究最广泛，开发最完善的工艺之一。在这项研究中，使用浸入式多孔介质阻挡放电（DBD）稳定地生成了基于等离子体的AOP，并将其添加到水溶液中。使用等离子体系统，可以通过允许使用臭氧，过氧化氢，紫外线（UV）和氢氧根来简化生成羟基自由基（OH）的过程的复杂性。在一台设备中同时生成的OH。分析了活性物质的电学性质和浓度，以建立最佳的等离子体操作条件。在有机污染物中，选择亚甲基蓝（MB）和甲基橙（MO）作为实验目标，因为它们分别是代表性的阳离子噻嗪和偶氮染料。通过测量UV-Vis的吸光度，总有机碳（TOC），色度和溶液性质的变化来分析结果。羟基自由基的作用（还研究了MB和MO降解率上的OH）清除剂（D-甘露醇）。基于这些结果，提出了MB和MO的降解机理。等离子处理3分钟后，MB和MO的浓度，色度和TOC迅速降低。因此，我们认为使用浸没式多孔DBD的基于等离子体的AOP作为替代技术可以处理有机污染物，具有优势。