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DOI | 10.1016/j.atmosenv.2021.118220 |
Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning | |
Huo Y.; Wang Y.; Qi W.; Jiang M.; Li M. | |
发表日期 | 2021 |
ISSN | 1352-2310 |
卷号 | 248 |
英文摘要 | The humic-like substances (HULIS) in PM2.5 in fresh and secondary emissions of crop straw burning will result in strong light absorption of atmospheric aerosols in the near-ultraviolet and visible light region. Herein, the relative carbon contents, light absorption properties, fluorescence characteristics, FTIR and 1H NMR spectra of fresh and secondary HULIS in crop straws (wheat, rice, and corn) burning were comprehensively characterized. The results showed that the ratios of carbon contents in HULIS to water-soluble organic carbon and organic carbon (HULIS-C/WSOC and HULIS/OC) of HULIS in secondary emissions of crop straw burning were higher than that in fresh emissions. The MAE365 (mass absorption efficiencies at 365 nm) of secondary HULIS in crop straws burning were larger than that in fresh emissions. Excitation-emission matrix (EEM) spectra indicated that fresh HULIS contained phenol-like substances, which can form light-absorbing substances through secondary conversion. The spectrum of FTIR and 1H-nuclear magnetic resonance (1H NMR) showed that chemical structures of secondary HULIS in crop straws combustion were more complicated and contained more absorbing aromatic groups (e.g. aromatic rings, carbonyl groups, and aliphatic chains). Therefore, the secondary aerosol conversion may cause more aromatic structures in HULIS from crop straws burning, resulting in stronger light absorption abilities. © 2021 Elsevier Ltd |
关键词 | Biomass combustionEEM analysisHULIS characterizationsLight adsorption propertiesParticulate matter analysis |
语种 | 英语 |
scopus关键词 | Aromatization; Atmospheric aerosols; Crops; Fourier transform infrared spectroscopy; Light; Light absorption; Nuclear magnetic resonance; Nuclear magnetic resonance spectroscopy; Organic carbon; Absorption abilities; Absorption property; Excitation emission matrices; Fluorescence characteristics; Humic-like substances; Light-absorbing substances; Visible light region; Water-soluble organic carbon; Secondary emission; aliphatic compound; aromatic compound; carbonyl derivative; organic carbon; absorption; adsorption; aerosol; biomass burning; combustion; fluorescence; humic substance; particulate matter; solubility; straw; transformation; ultraviolet radiation; visible spectrum; aerosol; air pollutant; Article; biomass; chemical structure; combustion; data analysis; Fourier transform infrared spectroscopy; humic like substance; humic substance; light; light absorption; particulate matter 2.5; priority journal; proton nuclear magnetic resonance; solid phase extraction; spectrofluorometry; ultraviolet radiation |
来源期刊 | ATMOSPHERIC ENVIRONMENT
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/248574 |
作者单位 | College of Environmental Science and Engineering, Beijing Forestry University, Beijing, China; Department of Environmental Science and Engineering, Fudan University, Shanghai, China |
推荐引用方式 GB/T 7714 | Huo Y.,Wang Y.,Qi W.,et al. Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning[J],2021,248. |
APA | Huo Y.,Wang Y.,Qi W.,Jiang M.,&Li M..(2021).Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning.ATMOSPHERIC ENVIRONMENT,248. |
MLA | Huo Y.,et al."Comprehensive characterizations of HULIS in fresh and secondary emissions of crop straw burning".ATMOSPHERIC ENVIRONMENT 248(2021). |
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