Environmental Effects of Aircraft Engine Exhaust Particles (A. Laskin's DOD-ILA, PNNL Scope #49510)
EMSL Project ID
17097
Abstract
The environmental effects of aircraft engine exhaust particles have recently gained increasing attention primarily focused on their vital role in influencing the upper troposphere - lower stratosphere ozone chemistry, radiative properties of the atmosphere, alteration of natural cirrus clouds and promotion of the formation of additional cirrus clouds. There are also additional concerns about a variety of health risks and occupational hygiene and safety issues related to exposure to aircraft exhaust of flight line workers and populations housed near air force bases and civil airports.This DOD SERD funded project is aimed to conduct a number of comprehensive field studies of particulate emissions sampled from engines of in-service military aircrafts. Particulate emissions from the aircraft engines operating at different power settings between idle and typical cruise conditions will be measured both in-situ at the test site and sampled for further laboratory analyses. A variety of different experimental techniques will be used to determine the particle size, concentration, chemical composition, morphology and internal structure. Together, these combined measurements provide an important perspective on the principal characteristics of aircraft emitted particulates.
Aircraft exhaust plums will be sampled using a specially designed air-cooled stainless steel probe installed at the sampling sites behind the engine. Particle size distributions will be measured using an Electrical Low Pressure Impactor (ELPI, Dekati, Ltd., Finland) and Scanning Mobility Particle Sizer 3080 (SMPS, TSI, Inc.) The PM2.5 total mass was measured using a Tapered Element Oscillating Microbalance (TEOM, Rupprecht & Patashnick, East Greenbush, NY). We propose to deploy a linear quadrupole aerosol mass spectrometer (Q-AMS) of EMSL for continuous, in-situ monitoring of aerosol composition and size. Aerosol samples collected on twelve stages of the ELPI will be removed and transferred in storage boxes for laboratory analysis at EMSL. Laboratory analyses of collected samples will be carried out following the field campaigns using an array of modern, state-of-the-art microscopy and micro-spectroscopy techniques of EMSL as specified along with this proposal.
Project Details
Project type
Exploratory Research
Start Date
2005-12-27
End Date
2007-03-19
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Cheng MD, E Corporan, MJ DeWitt, CW Spicer, MW Holdren, KA Cowen, A Laskin, DB Harris, RC Shores, RH Kagann, and RA Hashmonay. 2008. "Probing Emissions of Military Cargo Aircraft: Description of a Joint Field Measurement Strategic Environmental Research and Development Program." EM: Air & Waste Management Association's magazine for environmental managers 58(6):787-796.
Laskin A, KA Cowen, ML Alexander, Y Dessiaterik, JP Cowin, DW Joseph, and CW Spicer. 2006. "Case Study of Particulate Emissions from In-Service C-130 Military Aircraft." Presented by Alex Laskin at National ACS Meeting, Atlanta, GA on March 27, 2006. PNNL-SA-48509.