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Title: Formation of Refractory Black Carbon by SP2-Induced Charring of Organic Aerosol

Abstract

Black carbon (BC) in the atmosphere continues to be a focus of research because its lightabsorptive properties put it second only to CO 2 as a warming agent of Earth's climate. Towards this end, the measurement of ambient BC has been aided greatly by the development of the Single Particle Soot Photometer (SP2) – an instrument that detects refractory black carbon (rBC) through laser-induced incandescence (Schwarz et al., 2006). Potential interference from other substances that can incandesce under 1064 nm illumination (e.g., some metals and minerals) is mitigated through the use of spectral bandpass filters (color temperature) to ensure that the SP2 remains highly selective to rBC. Here in this paper, we report on the detection of rBC that is produced through SP2 laser-induced charring (i.e., carbonization) of organic aerosols. Nigrosin – a non-BC-containing material – was used as a surrogate for light absorbing organic aerosols. The color temperature of the detected particles originating from charred nigrosin is near that of carbon black, fullerene soot, and ethylene soot, indicating that it is rBC. In conclusion, failure to properly account for this heretofore unidentified source of rBC will lead to an overestimate of rBC loadings, which could, in turn, impact aerosolmore » radiative forcing model predictions.« less

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [3];  [4];  [4]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental and Climate Sciences Dept.
  2. Aerodyne Research Inc., Billerica MA (United States); Boston College, Chestnut Hill, MA (United States). Dept. of Chemistry
  3. Boston College, Chestnut Hill, MA (United States). Dept. of Chemistry
  4. Aerodyne Research Inc., Billerica MA (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1457343
Report Number(s):
BNL-205802-2018-JAAM
Journal ID: ISSN 0278-6826
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Aerosol Science and Technology
Additional Journal Information:
Journal Volume: 52; Journal Issue: 12; Journal ID: ISSN 0278-6826
Publisher:
American Association for Aerosol Research
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Sedlacek, Arthur, Onasch, Timothy B., Nichman, Leonid, Lewis, Ernie R., Davidovits, Paul, Freedman, Andrew, and Williams, Leah. Formation of Refractory Black Carbon by SP2-Induced Charring of Organic Aerosol. United States: N. p., 2018. Web. doi:10.1080/02786826.2018.1531107.
Sedlacek, Arthur, Onasch, Timothy B., Nichman, Leonid, Lewis, Ernie R., Davidovits, Paul, Freedman, Andrew, & Williams, Leah. Formation of Refractory Black Carbon by SP2-Induced Charring of Organic Aerosol. United States. doi:10.1080/02786826.2018.1531107.
Sedlacek, Arthur, Onasch, Timothy B., Nichman, Leonid, Lewis, Ernie R., Davidovits, Paul, Freedman, Andrew, and Williams, Leah. Fri . "Formation of Refractory Black Carbon by SP2-Induced Charring of Organic Aerosol". United States. doi:10.1080/02786826.2018.1531107. https://www.osti.gov/servlets/purl/1457343.
@article{osti_1457343,
title = {Formation of Refractory Black Carbon by SP2-Induced Charring of Organic Aerosol},
author = {Sedlacek, Arthur and Onasch, Timothy B. and Nichman, Leonid and Lewis, Ernie R. and Davidovits, Paul and Freedman, Andrew and Williams, Leah},
abstractNote = {Black carbon (BC) in the atmosphere continues to be a focus of research because its lightabsorptive properties put it second only to CO2 as a warming agent of Earth's climate. Towards this end, the measurement of ambient BC has been aided greatly by the development of the Single Particle Soot Photometer (SP2) – an instrument that detects refractory black carbon (rBC) through laser-induced incandescence (Schwarz et al., 2006). Potential interference from other substances that can incandesce under 1064 nm illumination (e.g., some metals and minerals) is mitigated through the use of spectral bandpass filters (color temperature) to ensure that the SP2 remains highly selective to rBC. Here in this paper, we report on the detection of rBC that is produced through SP2 laser-induced charring (i.e., carbonization) of organic aerosols. Nigrosin – a non-BC-containing material – was used as a surrogate for light absorbing organic aerosols. The color temperature of the detected particles originating from charred nigrosin is near that of carbon black, fullerene soot, and ethylene soot, indicating that it is rBC. In conclusion, failure to properly account for this heretofore unidentified source of rBC will lead to an overestimate of rBC loadings, which could, in turn, impact aerosol radiative forcing model predictions.},
doi = {10.1080/02786826.2018.1531107},
journal = {Aerosol Science and Technology},
number = 12,
volume = 52,
place = {United States},
year = {2018},
month = {11}
}

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