Open AccessNovel Collection and Toxicological Analysis Techniques for IC Engine Exhaust Particulate Matter
Author(s) -
Michael Keane,
Xiaochun Shi,
Tong-man Ong
Publication year - 2008
Language(s) - English
Resource type - Reports
DOI - 10.2172/958563
Subject(s) - particulates , aerosol , environmental science , diesel exhaust , exhaust gas , diesel particulate filter , diesel engine , diesel fuel , waste management , chemistry , engineering , meteorology , automotive engineering , physics , organic chemistry
The project staff partnered with Costas Sioutas from the University of Southern California to apply the VACES (Versatile Aerosol Concentration Enhancement System) to a diesel engine test facility at West Virginia University Department of Mechanical Engineering and later the NIOSH Lake Lynn Mine facility. The VACES system was able to allow diesel exhaust particulate matter (DPM) to grow to sufficient particle size to be efficiently collected with the SKC Biosampler impinger device, directly into a suspension of simulated pulmonary surfactant. At the WVU-MAE facility, the concentration of the aerosol was too high to allow efficient use of the VACES concentration enhancement, although aerosol collection was successful. Collection at the LLL was excellent with the diluted exhaust stream. In excess of 50 samples were collected at the LLL facility, along with matching filter samples, at multiple engine speed and load conditions. Replicate samples were combined and concentration increased using a centrifugal concentrator. Bioassays were negative for all tested samples, but this is believed to be due to insufficient concentration in the final assay suspensions