Abstract
Suspended particulate matters (SPM) were collected in Nov. 1989 and in Jan.1990 across a main road, Route 19 bypass in Kasugai, by using five hi-vol air samplers. Each sampler was calibrated beforehand by means of variance analytical method. Metallic elements of the SPM were analysed by ICP-AES.Contributions to SPM from six major sources (diesel engine, iron and steel industry, refuse incineration, oil combustion, soil and sea salt) were calculated by a chemical element balance (CEB) method using seven elements of elemental carbon, Na, Al, K, V, Fe and Zn.
The result showed that the concentration of SPM does not decrease with a distance from the road edge, but has a maximum. According to the source contribution analysis by CEB method, the maximum SPM concentration is largely affected by resuspension of soil bust deposited on the neighboring minor roads. It was also found that the concentration estimated to be contributed by the diesel automobils decreases remarkably with the distance from the main road edge.
