報文
道路粉塵におけるベンゾトリアゾール系紫外線吸収剤の分布特性と路上負荷量の推定
2013 年 23 巻 1 号 p. 37-42
詳細
2013 年 23 巻 1 号 p. 37-42
The occurrence and ubiquitous distribution of persistent emerging pollutants, benzotriazole UV stabilizers (BUVSs), have been reported in the environment. However, little information is available on their potential sources of environmental exposure to BUVSs. In this study, we analyzed four BUVSs, such as UV-320, UV-326, UV-327, and UV-328, in road dust samples collected from Route 3 in Kumamoto Prefecture. BUVSs were detected in most samples analyzed, at geometric mean concentrations of 0.61, 11, 3.3, and 12 ng/g dry wt. for UV-320, UV-326, UV-327, and UV-328, respectively. Significant correlations were found between BUVSs concentrations in road dusts and traffic density, suggesting that automobile was a major source of BUVSs in road dust. The amounts of BUVSs on the surface of the Route 3 in Kumamoto city was estimated as 1,700 μg, and a samples of 60 ∼ 250 μm particles was the dominant fraction to accumulate BUVSs in road dust. These results indicates that road dust may be a non-point source of BUVSs into the environment.
