Abstract：
This study proposes a novel and eco-friendly approach for wastewater treatment using plasma jet technology under bubble condition. This method allows for the controlled production of highly reactive hydroxyl radicals () while minimizing unwanted interactions with nitrogen in the air. The presence of bubbles in liquid significantly boosts the diffusion of within the wastewater, leading to a two-fold increase in degradation rate compared to normal condition. The effectiveness of the treatment was confirmed through ultraviolet-visible spectroscopy, which showed a significant decrease in rhodamine B and methyl orange absorbance peaks . Raman spectroscopy further revealed structural changes in both pollutants, indicating successful degradation. Additionally, plasma characteristics like power, electron temperature, and density were monitored to gain deeper insights into the underlying mechanism. Importantly, the process minimizes the formation of harmful secondary pollutants such as ozone and nitrogen oxides. These pollutants were found under concentration of 0.14 mg m-3 which is below established safety thresholds, adhering to World Health Organization guidelines. This research demonstrates that plasma jet treatment in bubble condition not only enhances the degradation efficiency of pollutants in wastewater but also minimizes the formation of harmful byproducts. This represents a significant breakthrough in developing sustainable wastewater treatment technologies.
摘要：
本研究提出了一种在气泡条件下使用等离子射流技术处理废水的新颖且环保的方法。该方法允许高反应性羟基自由基()的受控产生,同时最小化与空气中的氮气的不期望的相互作用。液体中气泡的存在显著促进了废水中的扩散，导致降解速率比正常情况增加两倍。通过紫外可见光谱证实了治疗的有效性，其中罗丹明B和甲基橙的吸光度峰显著降低。拉曼光谱进一步揭示了两种污染物的结构变化，表示成功降解。此外,等离子体特性，如功率，电子温度,和密度进行了监测，以更深入地了解潜在的机制。重要的是,该过程最大限度地减少了有害二次污染物的形成，如臭氧和氮氧化物。这些污染物的浓度为0.14mgm-3，低于既定的安全阈值，遵守世界卫生组织的指导方针。这项研究表明，在气泡条件下进行等离子射流处理不仅可以提高废水中污染物的降解效率，而且可以最大程度地减少有害副产物的形成。这是开发可持续废水处理技术的重大突破。
