Emissions of Levoglucosan, Methoxy Phenols, and Organic Acids from Prescribed Burns, Laboratory Combustion of Wildland Fuels, and Residential Wood Combustion

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• 作者：Lynn R. Mazzoleni ; Barbara Zielinska ; Hans Moosmü ; ller
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：April 1, 2007
• 年：2007
• 卷：41
• 期：7
• 页码：2115 - 2122
• 全文大小：383K
• 年卷期：v.41,no.7(April 1, 2007)
• ISSN：1520-5851

文摘

Biomass combustion emissions make a significantcontribution to the overall particulate pollution in thetroposphere. Wildland or prescribed burns and residentialwood combustion emissions can vary due to differencesin fuel, season, time of day, and the nature of the combustion.Inadequate understanding of the relevance of thesebiomass combustion emissions is due to the lack ofcharacterization of open combustion emissions and thelimited understanding of the differences between these andresidential wood combustion. To provide new insight tobiomass combustion emissions, sampling was conductedin several types of conditions. Semi-volatile organiccompounds (SVOC) were collected during four separateprescribed burns in three different ecosystems, MariposaSequoia Grove within Yosemite National Park, CA,desert brushes of central rural Nevada, and ToiyabyeNational Forest near Lake Tahoe, NV. SVOC samples werealso collected under controlled conditions for severalwildland fuels, including conifer needles, wildland grasses,and sagebrush. Fireplace emissions from simulatedresidential wood combustion were also collected and areincluded here for comparison. A high degree of variabilitywas found in the emissions of organic carbon, elementalcarbon, levoglucosan, methoxy phenols, and organic acids.The variability in the emissions of levoglucosan does notcorrelate with the PM_2.5 gravimetric mass and thus may affectsource apportionment estimates.