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以水为自由基源通过电晕放电的方法产生强氧化性羟基自由基(·OH),通过电子自旋共振技术(ESR)直接证实了·OH的生成.电晕放电产生的·OH能有效降解气态有机污染物从而降低废气的毒性.实验表明,在以含饱和水蒸气的空气为介质的含甲苯废气中,在电晕放电极间电压为20kV,放电电流为0.1mA,反应时间为120s,甲苯初始浓度为168mg/m3的条件下,甲苯的降解效率接近100%.并检测到了7种溶解在液相中的甲苯氧化中间产物.环境友好的·OH的应用为气态污染物的脱除开辟了新的途径.
Hydroxyl free radical (· OH) was generated by corona discharge with water as a free radical source, and the formation of · OH was directly confirmed by electron spin resonance (ESR). · · · OH generated by corona discharge was effective Degradation of gaseous organic pollutants and thus reduce the toxicity of exhaust gas.The experiment shows that in the saturated steam-containing air containing toluene as the medium, the voltage between the corona discharge electrode is 20kV, the discharge current is 0.1mA, the reaction time is 120s , The initial toluene concentration of 168mg / m3 under the conditions of the degradation efficiency of toluene close to 100% and detected seven dissolved in the liquid phase of toluene oxidation intermediates. The application of environmentally friendly · OH removal of gaseous pollutants Opened up new avenues