The Physical-Chemical Characteristics of Particles Associated With Polynuclear Aromatic Hydrocarbons Present in Automobile Exhaust to Coordinating Research Council

摘要

Research has been conducted to investigate the physical-chemical characteristics of the particles associated with polynuclear aromatic hydrocarbons (PNA) present in automobile exhaust. The major emphasis has been placed on the attempt to determine whether there is a selective association between the presence of benzo(a)pyrene and specific particle types. Analyses have been performed on single particles or aggregates and on particle-size fractions separated with the Battelle cascade impactor. Lead was found to be the metal constituent in the most prevalent smaller particles, and calcium and iron were found primarily contained in larger particles. Compositional variations among impactor size-fractions were not found to correlate with the distribution of benzo(a)pyrene which was detected in each impactor fraction analyzed. (Author)