基于单颗粒质谱研究云雾水和降雨中颗粒物的化学成分  

Research on the chemical composition of particles in cloud/fog water and rainwater based on single particle mass spectrometry

作　　者：阳宇翔 彭加仙 傅玉珍 张国华[1,4] 林钦浩 李磊 代新 毕新慧[1,4] 王新明[1,4] YANG Yu-xiang;PENG Jia-xian;FU Yu-zhen;ZHANG Guo-hua;LIN Qin-hao;LI Lei;DAI Xin;BI Xin-hui;WANG Xin-ming(State Key Laboratory of Organic Geochemistry,Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China;Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control,School of Environmental Science and Engineering,Institute of Environmental Health and Pollution Control,Guangdong University of Technology,Guangzhou 510006,China;Institute of Mass Spectrometry and Atmospheric Environment,Jinan University,Guangzhou 510632,China;Guangzhou Hexin Kangyuan Medical Technology CO.,LTD.,Guangzhou 510700,China)

机构地区：[1]中国科学院广州地球化学研究所有机地球化学国家重点实验室广东省环境保护与资源利用重点实验室,广东广州510640 [2]中国科学院大学,北京100049 [3]上海大学环境与化学工程学院,上海200444 [4]中国科学院广州地球化学研究所粤港澳环境污染过程与控制联合实验室,广东广州510640 [5]广东工业大学环境科学与工程学院环境健康与污染控制研究院,广东广州510006 [6]暨南大学质谱仪器与大气环境研究所,广东广州510632 [7]广州禾信康源医疗科技有限公司,广东广州510700

出　　处：《地球化学》2021年第6期635-643,共9页Geochimica

基　　金：广东省自然科学基金(2019B151502022);广东省科技计划项目(2019B121205006;2017B030314057)。

摘　　要：气溶胶可作为云凝结核或冰核参与云雾和降水的形成。然而,现有研究大多以云雾水和降雨中的水溶性组分为研究对象,对于难溶性组分的认识还十分有限。本研究于2017年5~6月在广东天井山观测站(24°41′56″N,112°53′56″E,海拔1690m)采集了21个云雾水和9个雨水样品,利用单颗粒气溶胶质谱直接分析其中的单颗粒化学成分。通过聚类分析发现:(1)海盐、矿尘颗粒和生物气溶胶对云凝结核和冰核的贡献较高(数量占比为67.3%~75.1%)。结合气团轨迹分析发现,海盐气溶胶经长距离的内陆输送后仍是重要的云凝结核和冰核;(2)云雾水和雨水中颗粒类型差异较大,云雾水中海盐(35.7%)、有机物(12.1%)、有机胺(8.0%)及Fe(6.4%)的贡献更大,而雨水中矿尘(35.6%)、与有机物混合的黑碳颗粒(18.9%)的贡献高,反映了气溶胶形成暖云和混合相云过程的差异。Aerosols can participate in the formation of clouds and precipitation as cloud condensation nuclei(CCN)or ice cores(IN). However, most existing studies focus on the water-soluble components in cloud water and rainfall,and the understanding of the insoluble components remains limited. In the present study, 21 cloud water and 9 rainwater samples were collected from May to June 2017, at the Guangdong Tianjingshan Observation Station(24°41′56″N, 112°53′56″E, altitude 1690 m), and analyzed by single particle aerosol mass spectrometry. Through cluster analysis, it was found that sea salt, mineral dust, and biological particles have the highest contributions to CCN and IN(67.3%–75.1%), and the analysis of air mass trajectory shows that sea salt aerosols are important to CCN and IN even after long-distance inland transportation. Additionally, the difference between particle types in cloud water and rainwater is large. The contributions of sea salt(35.7%), organic matter(12.1%), amines(8.0%),and iron(6.4%) in cloud water are greater, whereas the contributions of mineral dust(35.6%) and black carbon mixed with organics(18.9%) in rainwater are higher, which may reflect discrepancies between the formation of warm clouds and mixed-phase clouds by different aerosols.

关 键 词：云雾水 雨水 化学组分 单颗粒气溶胶 天井山 

分 类 号：P593[天文地球—地球化学] X513[天文地球—地质学]