DOI: 10.1016/j.atmosenv.2020.117297
论文题名: Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers
作者: Yang Y. ; Qin J. ; Qi T. ; Zhou X. ; Chen R. ; Tan J. ; Xiao K. ; Ji D. ; He K. ; Chen X.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 223 语种: 英语
英文关键词: 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
学科: Coal-fired boilers
; Excitation-emission matrix fluorescence spectroscopy
; Fluorescence characteristics
; Source emissions
; Water-soluble organic matter
中文摘要: 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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160955
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Yang Y.,Qin J.,Qi T.,et al. Fluorescence characteristics of particulate water-soluble organic compounds emitted from coal-fired boilers[J]. Atmospheric Environment,2020-01-01,223