Abstract
Several studies have linked diesel engine exhaust particulate matter (DPM) to adverse health effects. To examine the effects of biodiesel blends on light-duty diesel engine exhaust composition, concentrations of a select number of target compounds were determined in petrodiesel-biodiesel [waste vegetable oil (WVO) and soybean (SOY) feedstocks] fuel blends, lubricating oil, and exhaust particulate matter (PM). Particulate matter was generated from a light-duty diesel engine running on a transient drive cycle and fueled with WVO (B10, B20, B50, and B100 where Bxx refers to volume % biodiesel in fuel blend) and SOY (B20 and B100) biodiesel fuels blended with ultralow sulfur diesel (ULSD) reference fuel (B00). As expected, concentrations of individual n-alkanes (C12–C24) decreased with increasing biodiesel content but were absent from B100 for both WVO and SOY feedstocks. No target PAHs, carbonyls, and quinones were detected in B00 fuel, biodiesel fuel blends (for both WVO and SOY), or lubricating oil. No FAM...
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