MICROENVIRONMENTAL MODEL OF PERSONAL EXPOSURE TO PARTICLES AND M1CROBIAL AEROSOLS

摘要

The personal exposure and microenvironmental particle mass concentrations, absorption coefficient of filters (black smoke) and microbial concentrations were measured among 81 teachers of two municipals in Finland during wintertime 1998 - 1999. Samples were collected using 24-hour measurement periods in personal exposure and microenvironmental measurements in homes and 8-hour measurement periods in workplaces. The concentrations of personal particle mass exposures were higher than home or workplace concentrations. Absorption coefficients of personal exposure and workplace filters were on same level but they were higher than absorption coefficients of home filters. Microbial concentrations in workplaces were higher than home or personal exposure concentrations. The time weighed microenvironmental model was useful to assess absorption coefficient of personal exposure filters but underestimated personal exposure concentrations for particle mass and total microbes. Our study indicates that personal exposure deserves to be measured to assess the real exposure to bioaerosols and other particles.