微纳米气泡体系对NO氧化吸收效果的研究

Study on Oxidation and Absorption of NO Using Micro-nano Bubbles System

微纳米气泡比表面积大,气泡内部压力远高于外部压力,在液相中停留时间长,具有强氧化等特性。利用微纳米气泡发生器将水、空气和NO混合产生微纳米气泡气液体系用于NO的吸收。结果表明,NO体积浓度为1 250×10^(-6),pH=7,NO的氧化吸收效率可以达到50.1%。在水相中加入Fe^(2+)后,NO体积浓度为3 750×10^(-6),pH=5,NaCl质量浓度为0.5 g/L,十二烷基硫酸钠(SDS)质量浓度为6 mg/L时,Fe^(2+)摩尔浓度为2 mmol/L,NO的吸收效率可以达到82.1%。加入Mn^(2+)后,其他条件不变,当Mn^(2+)摩尔浓度为2 mmol/L时,NO吸收效率可以达到92.3%。

With the property of large surface area, higher internal pressure than the external pressure and strong oxidation,micro-nano bubbles, remaining in the liquid phase for long, was used for the absorption of NO. In this experimental study, a micro-nano bubble generator was used to mix water with air and NO to produce the gas-liquid system of micro bubbles,which was to be used to absorb NO. The experimental result showed that as NO volume concentration was 1 250×10^-6, pH value of the system being equal to 7, oxidation and absorption efficiency of NO reached 50.1%; and NO absorption efficiency could reach up to 82.1% on condition that Fe^2＋was added into the aqueous phase, NO volume concentration was 3 750×10^-6,NaCl mass concentration 0.5 g/L, sodium dodecyl sulfate（SDS） concentration 6 mg/L, the concentration of Fe^2＋ 2 mmol/L,and p H value of the system being 5. In addition, if Mn^2＋（concentration of Mn^2＋was 2 mmol/L） instead of Fe^2＋was added into the aqueous phase, other conditions remained unchanged, the absorption efficiency of NO could reach as high as 92.3%.