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Title: Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event

Abstract

Lag Ba'Omer, a nationwide bonfire festival in Israel, was chosen as a case study to investigate the influence of a major biomass burning event on the light absorption properties of atmospheric brown carbon (BrC). The chemical composition and optical properties of BrC chromophores were investigated using a high performance liquid chromatography (HPLC) platform coupled to photo diode array (PDA) and high resolution mass spectrometry (HRMS) detectors. Substantial increase of BrC light absorption coefficient was observed during the night-long biomass burning event. Most chromophores observed during the event were attributed to nitroaromatic compounds, comprising 28 elemental formulas of at least 63 structural isomers. The NAC, in combination, accounted for 50-80% of the total visible light absorption (> 400 nm) by solvent extractable BrC. The results highlight that NAC, particular nitrophenols, are important light absorption contributors of biomass burning organic aerosol (BBOA), suggesting that night time chemistry of ·NO3 and N2O5 with particles may play a significant role in atmospheric transformations of BrC. Nitrophenols and related compounds were especially important chromophores of BBOA. The absorption spectra of the BrC chromophores are influenced by the extraction solvent and solution pH, implying that the aerosol acidity is an important factor controlling the light absorptionmore » properties of BrC.« less

Authors:
 [1];  [2]; ORCiD logo [2]; ORCiD logo [3];  [4]; ORCiD logo [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
  2. Weizmann Inst. of Science, Rehovot (Israel)
  3. Univ. of California, Irvine, CA (United States)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1422327
Report Number(s):
PNNL-SA-126028
Journal ID: ISSN 0013-936X; 49352; KP1704020
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 51; Journal Issue: 20; Journal ID: ISSN 0013-936X
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Environmental Molecular Sciences Laboratory

Citation Formats

Lin, Peng, Bluvshtein, Nir, Rudich, Yinon, Nizkorodov, Sergey A., Laskin, Julia, and Laskin, Alexander. Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event. United States: N. p., 2017. Web. doi:10.1021/acs.est.7b02276.
Lin, Peng, Bluvshtein, Nir, Rudich, Yinon, Nizkorodov, Sergey A., Laskin, Julia, & Laskin, Alexander. Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event. United States. https://doi.org/10.1021/acs.est.7b02276
Lin, Peng, Bluvshtein, Nir, Rudich, Yinon, Nizkorodov, Sergey A., Laskin, Julia, and Laskin, Alexander. Sat . "Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event". United States. https://doi.org/10.1021/acs.est.7b02276. https://www.osti.gov/servlets/purl/1422327.
@article{osti_1422327,
title = {Molecular Chemistry of Atmospheric Brown Carbon Inferred from a Nationwide Biomass Burning Event},
author = {Lin, Peng and Bluvshtein, Nir and Rudich, Yinon and Nizkorodov, Sergey A. and Laskin, Julia and Laskin, Alexander},
abstractNote = {Lag Ba'Omer, a nationwide bonfire festival in Israel, was chosen as a case study to investigate the influence of a major biomass burning event on the light absorption properties of atmospheric brown carbon (BrC). The chemical composition and optical properties of BrC chromophores were investigated using a high performance liquid chromatography (HPLC) platform coupled to photo diode array (PDA) and high resolution mass spectrometry (HRMS) detectors. Substantial increase of BrC light absorption coefficient was observed during the night-long biomass burning event. Most chromophores observed during the event were attributed to nitroaromatic compounds, comprising 28 elemental formulas of at least 63 structural isomers. The NAC, in combination, accounted for 50-80% of the total visible light absorption (> 400 nm) by solvent extractable BrC. The results highlight that NAC, particular nitrophenols, are important light absorption contributors of biomass burning organic aerosol (BBOA), suggesting that night time chemistry of ·NO3 and N2O5 with particles may play a significant role in atmospheric transformations of BrC. Nitrophenols and related compounds were especially important chromophores of BBOA. The absorption spectra of the BrC chromophores are influenced by the extraction solvent and solution pH, implying that the aerosol acidity is an important factor controlling the light absorption properties of BrC.},
doi = {10.1021/acs.est.7b02276},
journal = {Environmental Science and Technology},
number = 20,
volume = 51,
place = {United States},
year = {Sat Aug 26 00:00:00 EDT 2017},
month = {Sat Aug 26 00:00:00 EDT 2017}
}

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