INITIAL SIZE DISTRIBUTIONS AND HYGROSCOPICITY OF INDOOR COMBUSTION AEROSOL-PARTICLES

Cigarette smoke, incense smoke, natural gas flames, propane fuel flame s, and candle flames are contributors of indoor aerosol particles. To provide a quantitative basis for the modeling of inhaled aerosol depos ition pattern, the hygroscopic growth of particles from these five sou rces as well as the source size distributions were measured. Because t he experiments were performed on the bases of particles of single size , it provided not only the averaged particle's hygroscopic growth of e ach source, but also the detailed size change for particles of differe nt sizes within the whole size spectrum. The source particle size dist ribution measurements found that cigarette smoke and incense smoke con tained particles in the size range of 100-700 nm, while the natural ga s, propane, and candle flames generated particles between 10 and 100 n m. The hygroscopic growth experiments showed that these combustion aer osol particles could grow 10% to 120%, depending on the particle sizes and origins.