Composition and Integrity of PAHs, Nitro-PAHs, Hopanes and Steranes In Diesel Exhaust Particulate Matter

Water, Air, and Soil Pollution
Lei HuangStuart A Batterman

Abstract

Diesel exhaust particulate matter contains many semivolatile organic compounds (SVOCs) of environmental and health significance. This study investigates the composition, emission rates, and integrity of 25 SVOCs, including polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs (NPAHs), and diesel biomarkers hopanes and steranes. Diesel engine particulate matter (PM), generated using an engine test bench, three engine conditions, and ultra-low sulfur diesel (ULSD), was collected on borosilicate glass fiber filters. Under high engine load, the PM emission rate was 0.102 g/kWh, and emission rate of ΣPAHs (10 compounds), ΣNPAHs (6 compounds), Σhopanes (2 compounds), and Σsteranes (2 compounds) were 2.52, 0.351, 0.02 ~ 2 and 1μg/kWh, respectively. Storage losses were evaluated for three cases: conditioning filters in clean air at 25 °C and 33% relative humidity (RH) for 24 h; storing filter samples (without extraction) wrapped in aluminum foil at 4 °C for up to one month; and storing filter extracts in glass vials capped with Teflon crimp seals at 4 °C for up to six months. After conditioning filters for 24 h, 30% of the more volatile PAHs were lost, but lower volatility NPAHs, hopanes and steranes showed negligible changes. Storing wr...Continue Reading

References

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Citations

Jan 6, 2016·Environmental Science and Pollution Research International·Monika FabiańskaJan Konieczyński
Apr 26, 2014·Environmental Toxicology and Chemistry·Lei HuangStuart A Batterman
Oct 19, 2016·Journal of the Air & Waste Management Association·Zuocheng WangGediminas Mainelis
Oct 7, 2016·Environmental Science. Processes & Impacts·Junfeng Jim ZhangKian Fan Chung
Dec 10, 2016·Reviews on Environmental Health·Erin P Madeen, David E Williams
Jun 14, 2020·International Journal of Environmental Research and Public Health·Piyaporn SricharoenvechKay Khine Aye

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