Size and composition distribution of fine particulate matter emitted from wood burning, meat charbroiling, and cigarettes

A dilution source sampling system is augmented to measure the size-distribu ted chemical composition of fine particle emissions from air pollution sour ces. Measurements are made using a laser optical particle counter (OPC), a differential mobility analyzer/condensation nucleus counter (DMA/CNC) combi nation, and a pair of microorifice uniform deposit impactors (MOUDIs). The sources tested with this system include wood smoke (pine, oak, eucalyptus), meat charbroiling, and cigarettes. The particle mass distributions from al l wood smoke sources have a single mode that peaks at approximately 0.1-0.2 mu m particle diameter. The smoke from meat charbroiling shows a major pea k in the particle mass distribution at 0.1-0.2 mu m particle diameter, with some material present at larger particle sizes. Particle mass distribution s from cigarettes peak between 0.3 and 0.4 mu m particle diameter. Chemical composition analysis reveals that particles emitted from the sources teste d here are largely composed of organic compounds. Noticeable concentrations of elemental carbon are found in the particles emitted from wood burning. The size distributions of the trace species emissions from these sources al so are presented, including data for Na, K, Ti, Fe, Pr, Ru, CI, Al, Zn, Ba, Sr, V, Mn, Sb, La, Ce, as well as sulfate, nitrate, and ammonium ion when present in statistically significant amounts. These data are intended for u se with air quality models that seek to predict the size distribution of th e chemical composition of atmospheric fine particles.