SO2和NO2在白云母表面的非均相反应研究
Heterogeneous reactions of SO2 and NO2 on the surface of muscovite
张星宇 1董发勤 1郑飞 2霍婷婷 1周琳 1余洁雨 1赵方源 3郭铭 1李文金1
作者信息
- 1. 西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳 621010;西南科技大学环境与资源学院,四川绵阳 621010
- 2. 西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳 621010;西南科技大学环境与资源学院,四川绵阳 621010;西昌学院理学院,四川西昌 615013
- 3. 西南科技大学固体废物处理与资源化教育部重点实验室,四川绵阳 621010;西南科技大学材料与化学学院,四川绵阳 621010
- 折叠
摘要
白云母是大气中矿物气溶胶的重要组分之一,研究大气中常见气体在其表面的非均相反应,在一定程度上可揭示大气环境中化学反应过程.文章采用自制石英玻璃微型反应器研究了 SO2和NO2在白云母颗粒物表面的非均相反应,并探讨了相对湿度(RH)及光照对该反应的影响.结果表明,白云母对SO2和NO2均有一定的吸附活性,有紫外光和无紫外光条件下,SO2的反应产物分别以SO42-和SO32-为主,NO2的产物均以NO3-为主;RH或者紫外光照对反应均具有促进作用,两者对硫酸盐和硝酸盐的生成有协同效应;当SO2和NO2在白云母表面共存时,既有协同作用又存在竞争反应,SO42-和NO3-的生成量分别是SO2、NO2单独存在的2.09倍和77％.因此,NO2能促进硫酸盐的生成,但SO2对硝酸盐的生成有明显抑制作用.
Abstract
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.
关键词
SO2/NO2/白云母/非均相反应Key words
SO2/NO2/muscovite/heterogeneous reaction引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据