Review of Diesel Particulate Matter Sampling Methods

................................................................................................ 3 Introduction............................................................................................ 3 Part 1................................................................................................. 3 Diesel aerosol composition and structure................................................... 3 Aerosol size distribution...................................................................... 5 Part 2.................................................................................................. 8 Diesel particle dynamics and behavior....................................................... 8 Particle size regimes.......................................................................... 8 Particle dynamics and particle-to-particle processes...................................... 9 Gas-to-particle conversion................................................................... 12 Effects of testing conditions on measured particulates.................................. 16 Part 3................................................................................................... 23 Illustration of factors influencing diesel aerosol size distribution obtained from different environments.......................................................................... 23 Laboratory studies............................................................................ 23 Studies conducted in underground mines using diesel equipment...................... 35 Roadway and tunnel studies.................................................................. 38 Atmospheric studies........................................................................... 49 Atmospheric source allocation for engine particulates.................................... 51 Summary.................................................................................................. 54 References................................................................................................ 55