Supplemental Information
Emissions and Partitioning of Intermediate-Volatility and Semi-Volatile Polar Organic Compounds (I/SV-POCs) during Laboratory Combustion of Boreal and Sub-Tropical Peat
Reddy L. N. Yatavelli,*,†,ϕ L. -W. Antony Chen, #,‡ Joseph Knue,† Vera Samburova,† Madhu Gyawali,†,@ Adam C. Watts,† Rajan K. Chakrabarty,§ Hans Moosmüller,† Alma Hodzic,◊ Xiaoliang Wang,† Barbara Zielinska,† Judith C. Chow,†,‡ John G. Watson,†,‡
†Division of Atmospheric Sciences, Desert Research Institute, Reno, Nevada 89512, United States
#Department of Environmental and Occupational Health, University of Nevada, Las Vegas, Nevada 89154, United States
‡Key Laboratory of Aerosol Science and Technology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China
§Department of Energy, Environmental and Chemical Engineering, Washington University in Saint Louis, St. Louis, Missouri 63130, United States
◊Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, Colorado 80301, United States
ϕPresent address: California Air Resources Board, 9480 Telstar Ave., Suite 4, El Monte, California 91731, United States
@Present address: San Jacinto College South, 13735 Beamer Rd, Houston, TX 77089
*Corresponding Author: Phone: 213-922-5958; e-mail:
Figure S1. Peat combustion and emissions sampling schematic
Figure S2. Fraction of water soluble organic carbon in the total organic carbon for different peats and ponderosa pine needles.
Table S1. Dry mass fractions (%) of carbon (C), hydrogen (H), Nitrogen (N), and Oxygen (O) for several peat fuels and ponderosa pine needles. Sulfur was below instrument detection limit for all fuels.
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Table S2. Experimental conditions during the combustion experiments. Dilution air (room air) temperature was on average 25 oC. Initial and final mass are the fuel mass before and after each burn. Aerosol organic matter (OM) = organic carbon (OC) × 1.4. CE – Combustion Efficiency, MCE – Modified Combustion Efficiency
Table S3. Estimated saturation vapor pressure (Pvap), saturation concentration (Cº), carbon oxidation state (OSc), Henry’s law constant (H), and equilibrium partitioning coefficients between aerosol organic matter and gas-phase (KOM-Gas), and water and gas-phase (KWater-Gas) for individual I/SV-POCs. Methods used to estimate the parameters listed below are referenced in the main text of the manuscript. Pvap and H values are calculated for 298 K.
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Table S4. Gas and particle-phase emission factor (EF) for individual I/SV-POCs measured during the combustion of Alaskan peat, Florida peat, Russian peat, and ponderosa pine needles. Values reported are EF ± standard deviation. Standard deviations are calculated by error propagation of analytical and measurement uncertainties. MC – moisture content.
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