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  • Emission Factors for Selected Semivolatile Organic Chemicals from Burning of Tropical Biomass Fuels and Estimation of Annual Australian Emissions

    Author(s)
    Wang, Xianyu
    Meyer, Carl P
    Reisen, Fabienne
    Keywood, Melita
    Thai, Phong K
    Hawker, Darryl W
    Powell, Jennifer
    Mueller, Jochen F
    Griffith University Author(s)
    Hawker, Darryl W.
    Year published
    2017
    Metadata
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    Abstract
    This study reveals that open-field biomass burning can be an important source of various semivolatile organic chemicals (SVOCs) to the atmosphere including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and a range of pesticides. Emission factors (EFs) for 39 individual SVOCs are determined from burning of various fuel types that are common in tropical Australia. Emissions of PAHs are found to be sensitive to differences in combustion efficiencies rather than fuel types, reflecting a de novo formation mechanism. In contrast, revolatilization may be important ...
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    This study reveals that open-field biomass burning can be an important source of various semivolatile organic chemicals (SVOCs) to the atmosphere including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and a range of pesticides. Emission factors (EFs) for 39 individual SVOCs are determined from burning of various fuel types that are common in tropical Australia. Emissions of PAHs are found to be sensitive to differences in combustion efficiencies rather than fuel types, reflecting a de novo formation mechanism. In contrast, revolatilization may be important for other SVOCs such as PCBs. On the basis of the EFs determined in this work, estimates of the annual emissions of these SVOCs from Australian bushfires/wildfires are achieved, including, for example, ∑PAHs (160 (min)–1100 (max) Mg), ∑PCBs (14–300 kg), ∑PBDEs (8.8–590 kg), α-endosulfan (6.5–200 kg), and chlorpyrifos (up to 1400 kg), as well as dioxin toxic equivalents (TEQs) of ∑dioxin-like-PCBs (0.018–1.4 g). Emissions of SVOCs that are predominantly revolatilized appear to be related to their use history, with higher emissions estimated for chemicals that had a greater historical usage and were banned only recently or are still in use.
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    Journal Title
    Environmental Science & Technology
    Volume
    51
    Issue
    17
    DOI
    https://doi.org/10.1021/acs.est.7b01392
    Subject
    Atmospheric composition, chemistry and processes
    Publication URI
    http://hdl.handle.net/10072/349006
    Collection
    • Journal articles

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