Catalyst-Free Oxidation Reactions in a Microwave Plasma Torch-Based Ion/Molecular Reactor: An Approach for Predicting the Atmospheric Oxidation of Pollutants,Analytical Chemistry

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Catalyst-Free Oxidation Reactions in a Microwave Plasma Torch-Based Ion/Molecular Reactor: An Approach for Predicting the Atmospheric Oxidation of Pollutants
Analytical Chemistry ( IF 6.7 ) Pub Date : 2022-12-23 , DOI: 10.1021/acs.analchem.2c04469
Fengjian Chu ₁ , Gaosheng Zhao ₂ , Wangyu Li ₃ , Wei Wei ₃ , Weiwei Chen ₃ , Zihan Ma ₃ , Zhan Gao ₃ , Nazifi Sani Shuaibu ₁ , Jikui Luo ₁ , Bingwen Yu ₄ , Hongru Feng ₃ , Yuanjiang Pan ₃ , Xiaozhi Wang ₁

Affiliation

The atmospheric oxidation of chemicals has produced many new unpredicted pollutants. A microwave plasma torch-based ion/molecular reactor (MPTIR) interfacing an online mass spectrometer has been developed for creating and monitoring rapid oxidation reactions. Oxygen in the air is activated by the plasma into highly reactive oxygen radicals, thereby achieving oxidation of thioethers, alcohols, and various environmental pollutants on a millisecond scale without the addition of external oxidants or catalysts (6 orders of magnitude faster than bulk). The direct and real-time oxidation products of polycyclic aromatic hydrocarbons and p-phenylenediamines from the MPTIR match those of the long-term multistep environmental oxidative process. Meanwhile, two unreported environmental compounds were identified with an MPTIR and measured in the actual water samples, which demonstrates the considerable significance of the proposed device for both predicting the environmental pollutants (non-target screening) and studying the mechanism of atmospheric oxidative processes.

中文翻译：

基于微波等离子体炬的离子/分子反应器中的无催化剂氧化反应：一种预测污染物大气氧化的方法

化学物质的大气氧化产生了许多新的不可预测的污染物。已开发出一种与在线质谱仪连接的基于微波等离子体炬的离子/分子反应器 (MPTIR)，用于创建和监测快速氧化反应。空气中的氧气被等离子体活化成高活性氧自由基，从而在不添加外部氧化剂或催化剂的情况下实现毫秒级氧化硫醚、醇和各种环境污染物（比本体快6个数量级）。 MPTIR 中多环芳烃和对苯二胺的直接实时氧化产物与长期多步环境氧化过程的产物相匹配。同时，利用MPTIR鉴定了两种未报告的环境化合物，并在实际水样中进行了测量，这表明该装置对于预测环境污染物（非目标筛选）和研究大气氧化过程的机制具有重要意义。

更新日期：2022-12-23

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