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A compact system for the generation and sampling of diesel particulate matter.
Farnoud A; Armendariz AJ
Proceedings of the AAAR 26th Annual Conference, September 24-28, 2007, Reno, Nevada. Mt. Laurel, NJ: American Association for Aerosol Research, 2007 Sep; :319
Many epidemiological and toxicological studies show that diesel particulate matter (DPM) can have adverse health effects to workers like miners and garage workers who are exposed to diesel exhaust. DPM is also one of the largest contributors to ambient PM pollution in urban areas around the world. The objective of this study was to design and build a compact laboratory system for the generation, sampling, and analysis of diesel particulate matter. DPM was produced by a 10 HP diesel-powered electric generator and directed from the muffler exit through 1-inch ID galvanized steel and silicone piping. Diesel exhaust number concentration was measured with a portable condensation particle counter (CPC), and mass concentration was measured by sampling with teflon fibrous filters. The DPM size distribution was measured with a 6-stage cascade impactor. Prior to number and mass sampling, the DPM was diluted using compressed air that was dehumidified and filtered through a 4-stage purification system. The dilution and sampling system was designed to optimize the mixing of dilution air and exhaust, minimize nucleation of vapors, and to allow for either number, mass, or size distribution analysis with few adjustments. The total cost of the entire system, including diesel generator, piping, flow meters, CPC, balances, and impactor was $24,500, and the footprint of the system in the laboratory was approximately 7 m2 (78 square feet).
Diesel-exhausts; Diesel-emissions; Particulates; Particulate-dust; Fuels; Emission-sources; Air-quality
Proceedings of the AAAR 26th Annual Conference, September 24-28, 2007, Reno, Nevada
Southern Methodist University