AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
Physical and Chemical Characterization of Fine Particles from Biomass Burning Process (Woods and Rice Straw)
HEE-JOO CHO, Shila Maskey, Arom Seo, Kihong Park, GIST
Abstract Number: 609 Working Group: Combustion
Abstract Biomass burning process, which includes natural open burning and prescribed burning, is one of the largest source of atmospheric aerosols. Most of the volume is in the accumulation mode (~ 80-90%), consisting of organic carbon (~80%), elemental carbon (~5-9%), and other trace inorganic species (~12-15%) (Reid JS et al., 2005). Chemical and physical properties of biomass burning aerosols mainly varied with fuel types and combustion phases (e.g., flaming combustion versus smoldering combustion). Once they emitted into the ambient atmosphere, their properties will also change with atmospheric aging. In this study, a biomass burning chamber with a dilution system was constructed to simulate various burning processes. Pine and oak woods and agricultural products (e.g., rice straw) obtained from Korea are used as fuel types. Particle size distribution, and hygroscopicity, volatility, and mixing state of biomass burning aerosols are measured with the scanning mobility particle sizer (SMPS) and hygroscopicity and volatility tandem differential mobility analyzer (HVTDMA), respectively. Due to existence of various refractory and non-refractory species in the biomass burning aerosols, our own type of AMS (GIST-AMS), recently developed by our group was used. This AMS employs both thermal vaporization-electron impact ionization and single step laser desorption ionization methods enabling us to measure non-refractory (sulfate, nitrate, ammonium, organics, and etc.) and refractory components (black carbon and heavy metals). Our progress on physical and chemical properties of biomass burning aerosols with varying fuel types and burning conditions will be presented.