globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2018.04.049
Scopus记录号: 2-s2.0-85046144265
论文题名:
Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China
作者: Qin J; , Zhang L; , Zhou X; , Duan J; , Mu S; , Xiao K; , Hu J; , Tan J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 184
起始页码: 203
结束页码: 211
语种: 英语
英文关键词: Aerosol source apportionment ; Excitation-emission matrix spectra ; Fluorescence properties ; Urban environment
Scopus学科分类: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
英文摘要: Excitation-emission matrix (EEM) spectra were used to analyze the fluorescence properties of water-soluble organic compounds (WSOC) in PM2.5 during winter and summer seasons in Lanzhou city, northwest China. Protein-like substances, humic-like substances and microbial by-products were found to be the main fluorophoric organic matter. Humification index (HIX), biological index (BIX) and fluorescence index (FI) were 1.2 ± 0.1, 1.4 ± 0.1 and 1.7 ± 0.2 in winter and 2.0 ± 0.3, 1.3 ± 0.1 and 1.2 ± 0.4 in summer, respectively, indicating higher aromaticity of WSOC in summer and terrestrial biogenic sources of WSOC in both seasons. Strong correlations were found between regional average fluorescence intensities (RAFI) at the fluorescence regions of II-V and water-soluble inorganic ions (K+, Cl−, NO3 − and SO4 2−) in winter with the Spearman correlation coefficients ρ being larger than 0.7 and mostly around 0.9, suggesting significant contributions of bioaerosols, coal combustion and vehicle exhaust to PM2.5. Moderate correlations were found between RAFI and K+, Cl−, and NO3 − in summer, indicating the more important roles of biogenic and vehicle exhaust than coal combustion sources in summer. High temperature in winter was conducive to and in summer prohibitive to polycondensation of WSOC, indicating the existence of an optimum temperature for such a process to occur. High relative humidity was unfavorable to the formation of fluorescent WSOC. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82844
Appears in Collections:气候变化事实与影响

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作者单位: College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China; Air Quality Research Division, Science & Technology Branch, Environment and Climate Change Canada, Toronto, Canada; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China; Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Qin J,, Zhang L,, Zhou X,et al. Fluorescence fingerprinting properties for exploring water-soluble organic compounds in PM2.5 in an industrial city of northwest China[J]. Atmospheric Environment,2018-01-01,184
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