气候变化领域集成服务门户(CCPortal): Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers

CCPortal

DOI	10.1016/j.atmosenv.2020.117297
	Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers
	Yang Y.; Qin J.; Qi T.; Zhou X.; Chen R.; Tan J.; Xiao K.; Ji D.; He K.; Chen X.
发表日期	2020
ISSN	13522310
卷号	223
英文摘要	The fluorescence characteristics of particulate water-soluble organic compounds (WSOC) emitted by different power of coal-fired boilers (A total of 14 boilers including 1, 2, 4, 6, 10, 15, 20 tons steam per hour (t·h−1)) in Lanzhou, an industrial city of northwest China, were analyzed by excitation-emission matrix (EEM) fluorescence spectroscopy. Results showed that the fluorescence profiles of WSOC in different power coal-fired boiler samples had certain similarities, reflecting the consistency of the fluorophore structures in the coal-originated WSOC. In general, the main excitation (Ex) and emission (Em) wavelength ranges of fluorescence peaks generated by WSOC were λEx = 230–250 nm and λEm = 360–430 nm. Since the fluorophore of WSOC was mainly concentrated in the fluorescent regions II and III, the main components in the fluorophore were tryptophan-like, fulvic acid and humic-like substances. Humification index (HIX), fluorescence index (FI) and freshness index (BIX) were 0.36 ± 0.36, 2.09 ± 0.42 and 1.02 ± 0.30, respectively. It may indicate that the particulate WSOC had a lower degree of humification and lower aromaticity. In the range of larger Stokes shift (λEx−1-λEm−1 ≥ 1.2 μm−1), the normalized fluorescence intensity of WSOC showed the largest peak, suggesting that there may be many hydrophobic substances containing a large number of π-conjugated systems in WSOC. These findings are not only conducive to cognize the optical characteristics of particulate matter emitted from coal-fired pollution sources, but also help to consummate the spectral characteristics of coal-fired pollution sources. © 2020 Elsevier Ltd
英文关键词	Coal-fired boilers; Excitation-emission matrix fluorescence spectroscopy; Fluorescence characteristics; Source emissions; Water-soluble organic matter
学科领域	Amino acids; Biodegradation; Coal; Fluorescence; Fluorescence spectroscopy; Fluorophores; Fossil fuel power plants; Industrial emissions; Organic compounds; Particles (particulate matter); Pollution; Excitation-emission matrix fluorescence spectroscopies; Excitation-emission matrix fluorescences; Fluorescence characteristics; Fluorescence intensities; Humification index (HIX); Spectral characteristics; Water soluble organic compounds; Water-soluble organic matter; Coal fired boilers; chlormethine; coal; fulvic acid; organic compound; organic matter; tryptophan; concentration (composition); equipment; fluorescence; fulvic acid; humification; inorganic compound; organic matter; particulate matter; Raman spectroscopy; spectroscopy; Article; boiler; chemical composition; combustion; controlled study; excitation; fire; flue gas; fluorescence analysis; humification; particulate matter; priority journal; quantum yield; spectrofluorometry; ultraviolet visible spectroscopy; water vapor; China; Gansu; Lanzhou
语种	英语
scopus关键词	Amino acids; Biodegradation; Coal; Fluorescence; Fluorescence spectroscopy; Fluorophores; Fossil fuel power plants; Industrial emissions; Organic compounds; Particles (particulate matter); Pollution; Excitation-emission matrix fluorescence spectroscopies; Excitation-emission matrix fluorescences; Fluorescence characteristics; Fluorescence intensities; Humification index (HIX); Spectral characteristics; Water soluble organic compounds; Water-soluble organic matter; Coal fired boilers; chlormethine; coal; fulvic acid; organic compound; organic matter; tryptophan; concentration (composition); equipment; fluorescence; fulvic acid; humification; inorganic compound; organic matter; particulate matter; Raman spectroscopy; spectroscopy; Article; boiler; chemical composition; combustion; controlled study; excitation; fire; flue gas; fluorescence analysis; humification; particulate matter; priority journal; quantum yield; spectrofluorometry; ultraviolet visible spectroscopy; water vapor; China; Gansu; Lanzhou
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/120755
作者单位	College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; National Key Laboratory of Environmental Composite Atmospheric Combined Pollution Sources, School of Environment, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Yang Y.,Qin J.,Qi T.,et al. Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers[J],2020,223.
APA	Yang Y..,Qin J..,Qi T..,Zhou X..,Chen R..,...&Chen X..(2020).Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers.Atmospheric Environment,223.
MLA	Yang Y.,et al."Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers".Atmospheric Environment 223(2020).