skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Correlations between Optical, Chemical and Physical Properties ofBiomass Burn Aerosols

Abstract

Aerosols generated from burning different plant fuels were characterized to determine relationships between chemical, optical and physical properties. Single scattering albedo ({omega}) and Angstrom absorption coefficients ({alpha}{sub ap}) were measured using a photoacoustic technique combined with a reciprocal nephelometer. Carbon-to-oxygen atomic ratios, sp{sup 2} hybridization, elemental composition and morphology of individual particles were measured using scanning transmission X-ray microscopy coupled with near-edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS) and scanning electron microscopy with energy dispersion of X-rays (SEM/EDX). Particles were grouped into three categories based on sp2 hybridization and chemical composition. Measured {omega} (0.4-1.0 at 405 nm) and {alpha}{sub ap} (1.0-3.5) values displayed a fuel dependence. The category with sp{sup 2} hybridization >80% had values of {omega} (<0.5) and {alpha}{sub ap} ({approx}1.25) characteristic of light absorbing soot. Other categories with lower sp2 hybridization (20 to 60%) exhibited higher {omega} (>0.8) and {alpha}{sub ap} (1.0 to 3.5) values, indicating increased absorption spectral selectivity.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director. Office of Science. Biological andEnvironmental Research
OSTI Identifier:
929687
Report Number(s):
LBNL-63791
Journal ID: ISSN 0094-8276; GPRLAJ; R&D Project: 405502; BnR: KP1205030; TRN: US200812%%755
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysical Research Letters; Journal Volume: 34; Related Information: Journal Publication Date: September 20,2007
Country of Publication:
United States
Language:
English
Subject:
54; ABSORPTION; AEROSOLS; ALBEDO; BIOMASS; CHEMICAL COMPOSITION; FINE STRUCTURE; HYBRIDIZATION; MICROSCOPY; MORPHOLOGY; PHYSICAL PROPERTIES; SCANNING ELECTRON MICROSCOPY; SCATTERING; SOOT; SPECTROSCOPY; aerosol biomass burn

Citation Formats

Hopkins, Rebecca J., Lewis, K., Desyaterik, Yury, Wang, Z., Tivanski, Alexei V., Arnott, W.P., Laskin, Alexander, and Gilles, M.K. Correlations between Optical, Chemical and Physical Properties ofBiomass Burn Aerosols. United States: N. p., 2008. Web.
Hopkins, Rebecca J., Lewis, K., Desyaterik, Yury, Wang, Z., Tivanski, Alexei V., Arnott, W.P., Laskin, Alexander, & Gilles, M.K. Correlations between Optical, Chemical and Physical Properties ofBiomass Burn Aerosols. United States.
Hopkins, Rebecca J., Lewis, K., Desyaterik, Yury, Wang, Z., Tivanski, Alexei V., Arnott, W.P., Laskin, Alexander, and Gilles, M.K. Tue . "Correlations between Optical, Chemical and Physical Properties ofBiomass Burn Aerosols". United States. doi:. https://www.osti.gov/servlets/purl/929687.
@article{osti_929687,
title = {Correlations between Optical, Chemical and Physical Properties ofBiomass Burn Aerosols},
author = {Hopkins, Rebecca J. and Lewis, K. and Desyaterik, Yury and Wang, Z. and Tivanski, Alexei V. and Arnott, W.P. and Laskin, Alexander and Gilles, M.K.},
abstractNote = {Aerosols generated from burning different plant fuels were characterized to determine relationships between chemical, optical and physical properties. Single scattering albedo ({omega}) and Angstrom absorption coefficients ({alpha}{sub ap}) were measured using a photoacoustic technique combined with a reciprocal nephelometer. Carbon-to-oxygen atomic ratios, sp{sup 2} hybridization, elemental composition and morphology of individual particles were measured using scanning transmission X-ray microscopy coupled with near-edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS) and scanning electron microscopy with energy dispersion of X-rays (SEM/EDX). Particles were grouped into three categories based on sp2 hybridization and chemical composition. Measured {omega} (0.4-1.0 at 405 nm) and {alpha}{sub ap} (1.0-3.5) values displayed a fuel dependence. The category with sp{sup 2} hybridization >80% had values of {omega} (<0.5) and {alpha}{sub ap} ({approx}1.25) characteristic of light absorbing soot. Other categories with lower sp2 hybridization (20 to 60%) exhibited higher {omega} (>0.8) and {alpha}{sub ap} (1.0 to 3.5) values, indicating increased absorption spectral selectivity.},
doi = {},
journal = {Geophysical Research Letters},
number = ,
volume = 34,
place = {United States},
year = {Tue Jan 29 00:00:00 EST 2008},
month = {Tue Jan 29 00:00:00 EST 2008}
}