This work aims to investigate the radical mechanism responsible for the degradation of a highly soluble pollutant in water. The AG25 dye was chosen as substrate and the GAD-Spray as biphasic reactor to treat it remotely. The study is conducted through experiments and simulations using Comsol Multiphysics-chemical engineering module. The Hydrodynamics coupled with the plasma-reaction has demonstrated that a low mass transfer in the droplet favorites the removal of the pollutant. It indicates that the plasma-reactions take place at the stagnant liquid film are far from the bulk of the droplet. Numerical modeling fitted by the conversion rate of the reagent has shown that the peroxynitrous acid HOONO (PON) is responsible for the degradation of AG25 in water. Consequently, and according different kinetic mechanisms, a radical mechanism has been predicted based on this deduction. The removal and the degradation rates were of 88 and 83% respectively during 90 min after the plasma exposure. The results of simulations showed a significant agreement between the calculated and the real removal rate of AG25. Through this study, it can be confirmed that GAD-spray-tower plasma reactor is efficient to eliminate and degrade remotely a very soluble pollutant through the HOONO (PON) plasma long-lived species.

中文翻译：

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双相等离子体反应器中的流体力学和传质研究

这项工作旨在研究导致水中高溶解度污染物降解的根本机理。选择AG25染料作为底物，选择GAD-Spray作为双相反应器进行远程处理。该研究是使用Comsol Multiphysics-化学工程模块通过实验和模拟进行的。流体动力学与等离子反应相结合已证明，液滴中的低质量转移会促进污染物的去除。这表明在停滞的液膜上发生的等离子体反应距离液滴的主体很远。由试剂的转化率拟合的数值模型表明，过氧亚硝酸HOONO（PON）负责水中AG25的降解。因此，根据不同的动力学机理，根据这种推论，已经预测出一种根本的机制。血浆暴露后90分钟内的去除率和降解率分别为88％和83％。模拟结果表明，AG25的计算去除率与实际去除率之间存在显着一致性。通过这项研究，可以确认GAD喷射塔式等离子体反应器可通过HOONO（PON）等离子体长寿命物种有效地消除和远程降解非常易溶的污染物。