TOF–SIMS surface analysis of chemical components of size–fractioned urban aerosols in a typical heavy air pollution event in Beijing  

作　　者：Wenjun Li Hong Li Jinjuan Li Xueli Cheng Zhengzheng Zhang Fahe Chai Hao Zhang Ting Yang Pengli Duan Defeng Lu Yizhen Chen 

机构地区：[1]College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China [2]State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China [3]Collaborative Innovation Center on Atmospheric Environment and Equipment Technology, Nanjing University of Information Science andTechnology, Nanjing 210044, China [4]SAE Technology Development (Dongguan) Co. Ltd., Guangdong 523087, China [5]Environment Research Institute, Shandong University, Jinan 250100, China [6]College of Earth Sciences,Jilin University, Changchun 130061, China [7]Institute of Environment Science, Shanxi University, Shanxi 030001, China [8]Core Tech Integrated (Beijing) Pty. Ltd., Beijing 100086, China

出　　处：《Journal of Environmental Sciences》2018年第7期61-76,共16页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.41175111 and 21177078);the Strategic Pilot Science and Technology Project of the Chinese Academy of Sciences(Class B)(No.XDB05010200);the National Natural Science Foundation of China(No.41265008);Key Discipline Construction Project,Guizhou(No.ZDXK[2016]11)

摘　　要：Size–fractioned atmospheric aerosol particles were collected during a typical heavy air pollution event in Beijing. The organic and inorganic components on the surfaces of the samples were analyzed using time–of–flight secondary ion mass spectrometry（TOF–SIMS）.The variation characteristics of the surface chemical composition and influencing factors were studied, and the possible sources of these chemical compositions were identified through principal component analysis. The results showed that inorganic components such as crustal elements and sulfate, and organic components such as aliphatic hydrocarbons and oxygen–containing organic groups were present. Some surface components, such as polycyclic aromatic hydrocarbons, heavy metals and fluorides may exert adverse effects on human health. The species and relative percentages of the chemical components varied with particle size, diurnal and pollution progress. During a heavy pollution event, the species and relative percentages of secondary components such as oxygen–containing organic groups and sulfurous compounds increased, indicating that particles aged during this event. The surface chemical composition of the aerosol particles was affected mainly by emissions from coal combustion and motor vehicles. In addition, air pollution, meteorological factors, and air mass transport also exerted a significant effect on the surface chemical composition of aerosol particles.Size–fractioned atmospheric aerosol particles were collected during a typical heavy air pollution event in Beijing. The organic and inorganic components on the surfaces of the samples were analyzed using time–of–flight secondary ion mass spectrometry（TOF–SIMS）.The variation characteristics of the surface chemical composition and influencing factors were studied, and the possible sources of these chemical compositions were identified through principal component analysis. The results showed that inorganic components such as crustal elements and sulfate, and organic components such as aliphatic hydrocarbons and oxygen–containing organic groups were present. Some surface components, such as polycyclic aromatic hydrocarbons, heavy metals and fluorides may exert adverse effects on human health. The species and relative percentages of the chemical components varied with particle size, diurnal and pollution progress. During a heavy pollution event, the species and relative percentages of secondary components such as oxygen–containing organic groups and sulfurous compounds increased, indicating that particles aged during this event. The surface chemical composition of the aerosol particles was affected mainly by emissions from coal combustion and motor vehicles. In addition, air pollution, meteorological factors, and air mass transport also exerted a significant effect on the surface chemical composition of aerosol particles.

关 键 词：Atmospheric aerosol particles Air pollution event Surface chemical composition Influence factor Static Time-of-flight secondary ion mass spectrometry BEIJING 

分 类 号：X513[环境科学与工程—环境工程]