SO_2与过渡金属离子在Soot上的非均相反应

The Heterogeneous Oxidation of Sulfur Dioxide and Transition-Metal Ions on Soot

应用FTIR-ATR研究了过渡金属离子与SO_2在Soot颗粒物表面的非均相反应,研究了在不同相对湿度(RH)环境且有Fe^(3+)和Mn2+存在条件下,SO_2在Soot颗粒表面发生的非均相反应过程。发现Fe^(3+)和Mn2+对于SO_2的非均相氧化反应有着显著的催化效应,并且随着RH的增加,硫酸盐的生成速率逐渐增大。该研究加深了对SO_2的迁移转化规律及其致霾效应的理解。

The heterogeneous oxidation of sulfur dioxide with transition-metal ions on the surface of Soot was investigate by Fourier transform infrared-attenuated total reflectance（FTIR-ATR）technique.The formation of sulfate was identifed on the surface of soot in the presence of SO2 with Fe3+and Mn2+at different relative humidity（RH）.The experiment results showed that the heterogeneous oxidation and the rate of sulfate formation were sensitive to RH.Fe3+and Mn2+have enhanced effects on the heterogeneous oxidation of sulfur dioxide.