气候变化领域集成服务门户(CCPortal): Semi-continuous measurement of chromophoric organic aerosols using the PILS-EEM-TOC system

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DOI	10.1016/j.atmosenv.2020.117941
	Semi-continuous measurement of chromophoric organic aerosols using the PILS-EEM-TOC system
	Chen Q.; Hua X.; Wang Y.; Zhang L.; Chang T.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Atmospheric chromophoric organic aerosols play an important role in climate and air quality. However, up to now, their sources and chemical reaction processes have not been fully understood. Three-dimensional excitation-emission matrix (EEM) method is a direct and effective way to identify the types and sources of the complex atmospheric chromophores, which can also be used to study the chemical reactions involved in the generation and disappearance process. In this study, a PILS-EEM-TOC system (a Particle-Into-Liquid-Sampler coupled with the EEM spectroscopy and a total organic carbon analyzer) was successfully developed for the first time. The results showed that this system can provide the transient dynamic trend of types and concentrations of the water-soluble chromophores in ambient particulate matter (PM) with a time-resolution of up to 15 min. By comparing the PM samples collected by the filter method, the result suggests that the online analysis of the chromophores by the PILS-EEM-TOC system is comparable to the offline filter method. In this case of Xi'an, China, the primary emission and secondary processes of the atmospheric chromophores were observed, the obvious effects of sandstorm-precipitation processes on the types and concentrations of chromophores were also found. The result suggests that a type of highly-oxygenated HULIS chromophores can be used as a secondary source tracer, and a type of less-oxygenated HULIS chromophores can be used as dust source tracer. The PILS-EEM-TOC system has great potential application in a wider spatiotemporal scope to explore the origin, generation and disappearance mechanisms of atmospheric chromophores. © 2020 Elsevier Ltd
关键词	Atmospheric chromophores Chemical reaction mechanisms PILS-EEM-TOC Source
语种	英语
scopus关键词	Aerosols; Air quality; Atmospheric chemistry; Chemical reactions; Organic carbon; Storms; Tracers; Ambient particulate Matter; Chemical reaction process; Excitation emission matrices; Precipitation process; Primary emissions; Secondary process; Total Organic Carbon; Transient dynamics; Chromophores; aerosol; air quality; chemical reaction; concentration (composition); measurement method; pollutant source; air monitoring; Article; chemical reaction; China; circadian rhythm; concentration (parameter); dust storm; excitation emission matrix spectroscopy; fluorescence intensity; limit of detection; online analysis; particulate matter; particulate matter 2.5; priority journal; spectroscopy; time series analysis; total organic carbon; China; Shaanxi; Xian
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248853
作者单位	School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
推荐引用方式 GB/T 7714	Chen Q.,Hua X.,Wang Y.,et al. Semi-continuous measurement of chromophoric organic aerosols using the PILS-EEM-TOC system[J],2021,244.
APA	Chen Q.,Hua X.,Wang Y.,Zhang L.,&Chang T..(2021).Semi-continuous measurement of chromophoric organic aerosols using the PILS-EEM-TOC system.ATMOSPHERIC ENVIRONMENT,244.
MLA	Chen Q.,et al."Semi-continuous measurement of chromophoric organic aerosols using the PILS-EEM-TOC system".ATMOSPHERIC ENVIRONMENT 244(2021).