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

Journal Article · · Environmental Science and Technology
 [1];  [2];  [2];  [3];  [4];  [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)
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.
Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1422327
Report Number(s):
PNNL-SA--126028; 49352; KP1704020
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 20 Vol. 51; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (23)

On the Use of Brown Carbon Spectra as a Tool to Understand Their Broader Composition and Characteristics: A Case Study from Crop-residue Burning Samples journal January 2019
Relationship between the molecular composition, visible light absorption, and health-related properties of smoldering woodsmoke aerosols posted_content September 2019
Regional Differences of Chemical Composition and Optical Properties of Aerosols in the Tibetan Plateau journal January 2020
Brown carbon in the continental outflow to the North Indian Ocean journal January 2019
Effect of heterogeneous oxidative aging on light absorption by biomass burning organic aerosol journal March 2019
Evolution of the light-absorption properties of combustion brown carbon aerosols following reaction with nitrate radicals journal February 2020
Aqueous Reactions of Sulfate Radical-Anions with Nitrophenols in Atmospheric Context journal December 2019
Light absorption by polar and non-polar aerosol compounds from laboratory biomass combustion journal January 2018
Heterogeneous OH oxidation of secondary brown carbon aerosol journal January 2018
Molecular composition of particulate matter emissions from dung and brushwood burning household cookstoves in Haryana, India journal January 2018
Dynamic changes in optical and chemical properties of tar ball aerosols by atmospheric photochemical aging journal January 2019
Composition and light absorption of N-containing aromatic compounds in organic aerosols from laboratory biomass burning journal January 2019
The formation of nitro-aromatic compounds under high NOx and anthropogenic VOC conditions in urban Beijing, China journal January 2019
Molecular composition and photochemical lifetimes of brown carbon chromophores in biomass burning organic aerosol journal January 2020
The characteristics of atmospheric brown carbon in Xi'an, inland China: sources, size distributions and optical properties journal January 2020
Relationship between the molecular composition, visible light absorption, and health-related properties of smoldering woodsmoke aerosols journal January 2020
Molecular Composition of Particulate Matter Emissions from Dung and Brushwood Burning Household Cookstoves in Haryana, India posted_content September 2017
Heterogeneous OH oxidation of secondary brown carbon aerosol posted_content March 2018
Evolution of the light-absorption properties of combustion brown carbon aerosols following reaction with nitrate radicals text January 2020
Evolution of the Light-absorption Properties of Combustion Brown Carbon Aerosols Following Reaction with Nitrate Radicals text January 2020
Evolution of the light-absorption properties of combustion brown carbon aerosols following reaction with nitrate radicals text January 2020
Effect of heterogeneous oxidative aging on light absorption by biomass burning organic aerosol text January 2019
Effect of heterogeneous oxidative aging on light absorption by biomass burning organic aerosol text January 2019

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