Aldehyde and PM Sampling at Watt Road

Under this National Transportation Research Center, Incorporated (NTRCI) funded activity, the Oak Ridge National Laboratory (ORNL) provided technical leadership, expertise, and support to augment certain air quality measurement activities performed by The University of Tennessee – Knoxville (UT-K), for NTRCI at the IdleAire facilities at Watt Road and I-40. The ORNL activity was focused on application of an innovative aldehyde measurement technique and complementary particulate matter (PM) measurements. Idling diesel engines are known to produce aldehydes, including listed air toxics such as formaldehyde and acetaldehyde. Recent experimental work performed by ORNL has shown high levels and rates of formaldehyde emissions from in-use heavy-duty trucks, especially at low ambient temperatures (order of 0degF). Similarly, particulate matter (PM) increased with decreasing ambient temperature, and the majority of PM increase was due to higher levels of the semi-volatile organic fraction (SOF). The SOF fraction of PM is thought to have the most toxicological effect ORNL began this effort in the wintertime of 2004 to collect seasonal extremes (ambient cold/hot) data on the subject emissions of interest. An intense sampling campaign was conducted over a two week period in February 2004, and again in late July-early August 2004. Analysis of the data indicates that the summer levels of these criteria and unregulated pollutants were lower than those observed during cold weather intense monitoring campaign, with organic carbon (OC) noted to be the dominant contributor for in each. Additionally, there was clear evidence that the localized atmosphere at the host truck stop location experiences higher PM than nearby roadside measurements (order of < 1 mile away) for both February and July/August. Additional observations were made regarding the day vs. night pattern in these emissions, and are reported. This report is intended as a complement to the University of Tennessee report on nitrogen oxide and particulate emissions measurements which were conducted in parallel.

• Record URL:
  http://www.ntrci.org/ntrci-51-2004-002
• 
• Corporate Authors:

  Oak Ridge National Laboratory

  2360 Cherahala Boulevard
  Knoxville, TN  United States  37932

  National Transportation Research Center, Incorporated

  2360 Cherahala Boulevard
  Knoxville, TN  United States  37932

  Regional Transportation Planning Organization, Knox County

  Knoxville, TN  United States 
• Authors:
  • Storey, John M
  • McGill, Ralph N
  • Lenox, Katey E
  • Parks II, James E
  • Lewis Jr, Samuel
  • Kahl, W Keith
• Publication Date: 2005-1

Language

• English

Media Info

• Media Type: Web
• Edition: Final Report
• Features: Appendices; Figures; Maps; Photos; References;
• Pagination: 23p

Subject/Index Terms

• TRT Terms: Aldehydes; Atmospheric temperature; Data collection; Diesel engine exhaust gases; Emissions testing; Formaldehyde; Particulates
• Uncontrolled Terms: Seasonal factors
• Subject Areas: Data and Information Technology; Environment; Highways; I15: Environment;

Filing Info

• Accession Number: 01357308
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 18 2011 12:14PM