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Particulate PAH Emissions from Residential Biomass Combustion: Time-Resolved Analysis with Aerosol Mass Spectrometry
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2014 (engelsk)Inngår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 48, nr 12, s. 7143-7150Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Time-resolved emissions of particulate polycyclic aromatic hydrocarbons (PAHs) and total organic particulate matter (OA) from a wood log stove and an adjusted pellet stove were investigated with high-resolution time-of-flight aerosol mass spectrometry (AMS). The highest OA emissions were found during the addition of log wood on glowing embers, that is, slow burning pyrolysis conditions. These emissions contained about 1% PAHs (of OA). The highest PAH emissions were found during fast burning under hot air starved combustion conditions, in both stoves. In the latter case, PAHs contributed up to 40% of OA, likely due to thermal degradation of other condensable species. The distribution of PAHs was also shifted toward larger molecules in these emissions. AMS signals attributed to PAHs were found at molecular weights up to 600 Da. The vacuum aerodynamic size distribution was found to be bimodal with a smaller mode (Dva ~ 200 nm) dominating under hot air starved combustion and a larger sized mode dominating under slow burning pyrolysis (Dva ~ 600 nm). Simultaneous reduction of PAHs, OA and total particulate matter from residential biomass combustion may prove to be a challenge for environmental legislation efforts as these classes of emissions are elevated at different combustion conditions.

sted, utgiver, år, opplag, sider
2014. Vol. 48, nr 12, s. 7143-7150
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Identifikatorer
URN: urn:nbn:se:su:diva-105571DOI: 10.1021/es500486jISI: 000337646000075OAI: oai:DiVA.org:su-105571DiVA, id: diva2:729225
Tilgjengelig fra: 2014-06-25 Laget: 2014-06-25 Sist oppdatert: 2022-02-23bibliografisk kontrollert

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Bergvall, ChristofferWesterholm, Roger

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