Heterogeneous reactions of SO2 and NO2 on the surface of muscovite
Muscovite is the important component of mineral aerosols in the atmosphere.The researches for hetero-geneous reactions of common gases in the atmosphere on the surface of muscovite will reveal the chemical reaction process in the atmosphere to a certain extent.In this study,the heterogeneous reaction of SO2 and NO2 on the sur-face of muscovite particles was investigated by a self-made quartz glass microreactor,and the effects of relative hu-midity(RH)and light on the reaction were also discussed.The results showed that muscovite has certain adsorption activity for both SO2 and NO2.The products in SO2 reaction with and without ultraviolet irradiation were mainly salt compounds containing SO42-and SO32-,respectively,while the products in NO2 reaction were always mainly salt compounds containing NO3-.The increase of RH or ultraviolet light had a promoting effect on the reaction,and they had a synergistic effect on the formation of sulfate and nitrate.When SO2 and NO2 coexist on the surface of musco-vite,there were both synergistic effect and competitive effect,and the generation amount of SO42-and NO3-was 2.09 times and 77％of that in the presence of a single gas,respectively.Therefore,NO2 promoted the formation of sul-fate,but SO2 had a significant inhibitory effect on the formation of nitrate.
国家科技期刊平台
NSTL
万方数据
