Chemical Structural Characteristics of HULIS and Other Fractionated Organic Matter in Urban Aerosols: Results from Mass Spectral and FT-IR Analysis

Environmental Science & Technology
Qingcai ChenMichihiro Mochida

Abstract

The chemical characteristics of complex organic matter in atmospheric aerosols remain poorly understood. Water-insoluble organic matter (WISOM) and water-soluble organic matter (WSOM) in the total suspended particulates collected in the city of Nagoya in summer/early autumn and winter were extracted using multiple solvents. Two fractions of humic-like substances, showing neutral and acidic behavior (HULIS-n and HULIS-a, respectively), and the remaining highly polar part (HP-WSOM) were fractionated from WSOM using solid phase extraction. The chemical structural characteristics and concentrations of the organic matter were investigated using mass spectrometry and Fourier transform infrared (FT-IR) spectroscopy. WISOM and HULIS-n had low O/C ratios (0.1 and 0.4, respectively) and accounted for a large fraction of the organics in aerosols (70%). HULIS-a and HP-WSOM had higher O/C ratios (0.7 and 1.0, respectively), and their concentrations in summer and early autumn were on average ∼2 times higher than those in winter. The mass spectrum and FT-IR analyses suggest the following: (1) WISOM were high-molecular-weight aliphatics (primarily C27-C32) with small proportions of -CH3, -OH, and C═O groups; (2) HULIS-n was abundant in aliphat...Continue Reading

References

Aug 22, 2006·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·N SundaraganesanB Dominic Joshua
Dec 15, 2006·Analytical Chemistry·Peter F DeCarloJose L Jimenez
Jun 25, 2009·Analytical Chemistry·N HertkornE M Perdue
Dec 17, 2009·Science·Meinrat O Andreae
Dec 17, 2009·Science·J L JimenezD R Worsnop
Jan 12, 2010·Environmental Science & Technology·Emily A BrunsM Lizabeth Alexander
Mar 3, 2010·Proceedings of the National Academy of Sciences of the United States of America·D K FarmerJ L Jimenez
Feb 15, 2011·Proceedings of the National Academy of Sciences of the United States of America·Lynn M RussellPaul J Ziemann
Dec 8, 2011·Environmental Science & Technology·Mikinori KuwataScot T Martin
Feb 20, 2013·Environmental Science & Technology·Liqing HaoAri Laaksonen
Jul 26, 2013·Environmental Science & Technology·Magda Psichoudaki, Spyros N Pandis
Mar 14, 2014·Environmental Science & Technology·David R WortonAllen H Goldstein

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Citations

Aug 19, 2016·The Science of the Total Environment·Jihua TanXavier Querol
Apr 17, 2019·Applied Spectroscopy·Andrea ArangioSatoshi Takahama
Sep 6, 2020·The Science of the Total Environment·Yusuke FujiiNorimichi Takenaka
Feb 6, 2021·International Journal of Environmental Research and Public Health·Marie-Cecile ChalbotIlias G Kavouras
Feb 7, 2018·Free Radical Biology & Medicine·Henry Jay Forman, Caleb Ellicott Finch
Mar 31, 2021·Environmental Science & Technology·Ruichen ZhouMichihiro Mochida
Aug 3, 2018·Environmental Science & Technology·Qingcai ChenZimeng Zhang

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