摘要：Outdoor and indoor SPM concentrations at roadside and roadside-vicinity dwellings were measured at three sites in Osaka City with differing traffic volumes over the nine years from 1996 to 2004. The sampling seasons were summer, autumn and winter, in each of which the duration of window opening was different. The correlation coefficient between outdoor and indoor SPM concentrations in non-smoking homes was 0.804 for PM2.5 and 0.811 for PM10. It was confirmed that indoor SPM concentration is significantly affected by outdoor SPM concentration. Outdoor and indoor PM2.5 concentrations at roadside dwellings were 33.3μg/m3 and 24.0μg/m3 respectively. The corresponding levels at roadside-vicinity dwellings were 24.7μg/m3 and 19.9μg/m3 respectively. Although the difference in indoor PM2.5 concentrations between roadside and roadside-vicinity dwellings (4.1μg/m3) was smaller than the difference in outdoor PM2.5 concentrations (8.6μg/m3), the considerably higher indoor PM2.5 concentration values for roadside dwellings were thought to be due to automobile exhaust. Predicted personal exposure PM2.5 concentrations of roadside and roadside-vicinity residents, calculated for time spent 80% indoors and 20% outdoors, were 25.9μg/m3 and 20.8μg/m3 respectively; the difference in these values was 5.1μg/m3.
关键词：SPM concentration;roadside dwelling;outdoor and indoor SPM concentration
