TY - GEN
T1 - Chemical and physical characterization of wood smoke under controlled conditions
AU - Hosseini, Seyedehsan
AU - Li, Qi
AU - Miller, Arthur
AU - Cocker, David
AU - Sharivastava, Manish
AU - Weise, David
AU - Hao, Weimin
AU - Yokelson, Robert
AU - Jung, Heejung
PY - 2009
Y1 - 2009
N2 - A selection of shrubs from California and Arizona and forest fuels from North Carolina and Georgia were burned under controlled environmental conditions at the USDA Forest Service's Fire Science Laboratory in Missoula. The goal was to improve measurement of particle emission factors. The chemical and physical properties of PM2.5 emissions during flaming and smoldering phases were characterized using a suite of real-time and off-line instrumentations. The particle size distribution indicated the number distribution peaked around 50nm for flaming and evolved into bimodal distribution with a second peak below 10nm during smoldering phase. EC/OC analysis of quartz filters suggests OC contributes to the most of total carbon fraction. A High Resolution Time-of-Flight Aerosol Mass Spectrometer identified the organic biomass signature in particles associated with the flaming and smoldering phases while ammonium nitrate, sulfate and chloride species were only observed during flaming stage. Elemental compositional analysis of oxygen and carbon indicated little changes in the O:C ratio (∼0.25-0.30) throughout entire burn. PM samples also were taken using a NIOSH-developed portable electrostatic precipitator. TEM, EDS, and Image analysis were used to classify recognizable morphologies ad to perform elemental analysis on PM.
AB - A selection of shrubs from California and Arizona and forest fuels from North Carolina and Georgia were burned under controlled environmental conditions at the USDA Forest Service's Fire Science Laboratory in Missoula. The goal was to improve measurement of particle emission factors. The chemical and physical properties of PM2.5 emissions during flaming and smoldering phases were characterized using a suite of real-time and off-line instrumentations. The particle size distribution indicated the number distribution peaked around 50nm for flaming and evolved into bimodal distribution with a second peak below 10nm during smoldering phase. EC/OC analysis of quartz filters suggests OC contributes to the most of total carbon fraction. A High Resolution Time-of-Flight Aerosol Mass Spectrometer identified the organic biomass signature in particles associated with the flaming and smoldering phases while ammonium nitrate, sulfate and chloride species were only observed during flaming stage. Elemental compositional analysis of oxygen and carbon indicated little changes in the O:C ratio (∼0.25-0.30) throughout entire burn. PM samples also were taken using a NIOSH-developed portable electrostatic precipitator. TEM, EDS, and Image analysis were used to classify recognizable morphologies ad to perform elemental analysis on PM.
UR - http://www.scopus.com/inward/record.url?scp=84946061467&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84946061467
T3 - Fall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 Fall Meeting
SP - 438
EP - 456
BT - Fall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009 Fall Meeting
PB - Western States Section/Combustion Institute
T2 - Fall Technical Meeting of the Western States Section of the Combustion Institute 2009, WSS/CI 2009
Y2 - 26 October 2009 through 27 October 2009
ER -