Residential wood combustion aerosol characterization as a function of size and source apportionment using chemical mass balance modeling
This research has determined the mass and composition distribution as a function of particle size for wood burning stove and fireplace aerosols. Sampling was done from cooled, diluted smoke plumes to better describe particulate properties as they exist in the atmosphere. The particulate composition variability noted in previous research was controlled by restricting sampling to hot burning (damper open combustion) and cool burning (air starved damper closed combustion). Size distributed traffic and residential oil burner aerosols were also samples. Hot burning RWC particles were black, had a unimodal size distribution and contained from 20 to 60% carbon (primarily elemental carbon) and high levels of trace elements (K, S, Cl). In contrast, cool burning RWC particles were tan, had a bimodal size distribution, and contained from 55 to 65% carbon (almost entirely organic carbon) and only minute amounts of trace elements. RWC composition data were used in CMB modeling of residential area aerosol samples by: (1) using a composite RWC composition profile adjusted for the proportion of damper-open and closed burning as determined by surveys; or (2) using both hot and cool RWC profiles together. It was demonstrated that combustion generated organic and elemental carbon distributions, especially for particles <0.3 m, shifted to larger sizes during their atmospheric residence time. This shift can be explained by coagulation. CMB modeling was also used to examine the effects of assuming that RWC particles lose organic carbon during their atmospheric residence time. For winter samples the agreement between organic and elemental carbon values calculated by the model and ambient values was improved by allowing RWC particles to lose from 25 to 65% of their organic carbon loading.
- Research Organization:
- Oregon Graduate Center, Beaverton, OR (USA)
- OSTI ID:
- 5492592
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
AEROSOLS
PARTICLE SIZE
PARTICULATES
CHEMICAL COMPOSITION
WOOD FUELS
COMBUSTION
AGGLOMERATION
AIR SAMPLERS
ATMOSPHERIC CHEMISTRY
CARBON
CHLORINE
COLOR
COMBUSTION KINETICS
FIREPLACES
FUEL-AIR RATIO
POTASSIUM
SULFUR
TIME DEPENDENCE
TRACE AMOUNTS
WOOD BURNING APPLIANCES
ALKALI METALS
APPLIANCES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DISPERSIONS
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FUELS
HALOGENS
KINETICS
METALS
NONMETALS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
OXIDATION
PARTICLES
PHYSICAL PROPERTIES
REACTION KINETICS
SAMPLERS
SIZE
SOLS
THERMOCHEMICAL PROCESSES
090400* - Solid Waste & Wood Fuels- (-1989)
140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)