Development of exposure system on toxic chemicals in road runoff by using bioavailability

本研究以冈山市区道路径流及道路沉积物中的多环芳烃等有毒化学物质为研究对象。这些化合物偶尔具有致癌潜力，并分布在各种环境中。研究了多环芳烃在公园土壤、小学土壤和道路沉积物中的积累、分布、毒性和生物有效性。多环芳烃在道路、公园等交通流量较大的地区和工业厂房的土壤中均有检出。对多环芳烃的来源和暴露量分析发现，与废气相比，多环芳烃主要来源于路面沥青。土壤的暴露风险低于空气和食物的暴露风险。

In this study, toxic chemicals such as polyaromatic hydrocarbons included in the road runoff and road sediment were investigated in Okayama city area. These compounds have occasionally carcinogenic potential and were distributed in the various environment. We investigated the accumulation, distribution and the toxicity, bioavailability of PAHs in especially soils of park, elemental school and road sediment. The PAHs were observed in the soils of road and parks that have many, traffic flux and industrial factories. Analysis on source and exposure of PAHs found the PAHs were originated on asphalt of the road surface compared with exhaust gas. These exposure risk of soils were evaluated lower than that of the exposure of air and food.