1993 Volume 42 Issue 8 Pages 461-466
Lung disease risk from inhalation of radon can be enhanced by the presence of particulate pollutants in indoor air. The indoor concentration of radon and particulates were measured in homes, a department store, and offices in a high building in Tokyo metropolis, as well as in homes in both northern and western Japan. Passive radon monitors were located in living rooms and offices for more than three months at 99 sites during the winter of 1988 and 1989. Indoor radon concentration ranged from 11.1 Bq/m3to 148Bq/m3 (n=99) and averaged value S.D. was 36.5±14.2 Bq/m3.However, the average concentration in air conditional buildings was 21.8±9.51 Bq/m3 (n=17) . Simultaneously at 65 of the radon sites, indoor particulates were collected using personal dust samplers by impaction methods. Deposited particulate concentrations on the sampler were measured and calculated in a unit of μm/m3.Concentrations were determined for particle sizes above and below 2.5 μm, for both smoking or non smoking sites. Consequently, concentration of particle size below 2.5 μm was high in smoking rooms. Finally, it was considered that smoking was a complex indoor pollutant as adherence of radon daughter to aerosols.