SO_(2)和NO_(2)在白云母表面的非均相反应研究  

Heterogeneous reactions of SO_(2)and NO_(2)on the surface of muscovite

作　　者：张星宇 董发勤[1,2] 郑飞 霍婷婷[1,2] 周琳 余洁雨 赵方源 郭铭 李文金 ZHANG Xing-yu;DONG Fa-qin;ZHENG Fei;HUO Ting-ting;ZHOU Lin;YU Jie-yu;ZHAO Fang-yuan;GUO Ming;LI Wen-jin(Key Laboratory of Waste Solid Treatment and Resource Recycle of Ministry of Education,Mianyang 621010,China;School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,China;College of Science,Xichang University,Xichang 615013,China;School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[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 [2]西南科技大学环境与资源学院,四川绵阳621010 [3]西昌学院理学院,四川西昌615013 [4]西南科技大学材料与化学学院,四川绵阳621010

出　　处：《岩石矿物学杂志》2024年第4期994-1004,共11页Acta Petrologica et Mineralogica

基　　金：国家自然科学基金项目(41831285)。

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SO_(2)和NO_(2)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SO_(2)和NO_(2)均有一定的吸附活性,有紫外光和无紫外光条件下,SO_(2)的反应产物分别以SO_(4)^(2-)和SO_(3)^(2-)为主,NO_(2)的产物均以NO_(3)^(-)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SO_(2)和NO_(2)在白云母表面共存时,既有协同作用又存在竞争反应,SO_(4)^(2-)和NO_(3)^(-)的生成量分别是SO_(2)、NO_(2)单独存在的2.09倍和77%。因此,NO_(2)能促进硫酸盐的生成,但SO_(2)对硝酸盐的生成有明显抑制作用。Muscovite is the important component of mineral aerosols in the atmosphere.The researches for heterogeneous 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 SO_(2)and NO_(2)on the surface of muscovite particles was investigated by a self-made quartz glass microreactor,and the effects of relative humidity(RH)and light on the reaction were also discussed.The results showed that muscovite has certain adsorption activity for both SO_(2)and NO_(2).The products in SO_(2)reaction with and without ultraviolet irradiation were mainly salt compounds containing SO_(4)^(2-)and SO_(3)^(2-),respectively,while the products in NO_(2)reaction were always mainly salt compounds containing NO_(3)^(-).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 SO_(2)and NO_(2)coexist on the surface of muscovite,there were both synergistic effect and competitive effect,and the generation amount of SO_(4)^(2-)and NO_(3)^(-)was 2.09 times and 77%of that in the presence of a single gas,respectively.Therefore,NO_(2)promoted the formation of sulfate,but SO_(2)had a significant inhibitory effect on the formation of nitrate.

关 键 词：SO_(2) NO_(2) 白云母 非均相反应 

分 类 号：P578.959[天文地球—矿物学] P579[天文地球—地质学]