動態解析

[VII-89] Investigation and Examination on Ecological Toxicity of Highway Dusts in Terms of PAHs Phototransformation

〇Yui Nishio¹, Atsushi Ichiki² (1.Graduate School of Ritsumeikan University, 2.Ritsumeikan University)

Keywords:Highway dusts, Chlorinated polycyclic aromatic hydrocarbons, Ecological Toxicity, Bioassay, Chironomus yoshimatsui

Highway dusts which have high potential of pollution run off into receiving waters without any treatment facilities during rainy weather periods. In particular, as the highway dusts have remarkable ecological toxicity in winter, some studies have been conducted assuming combined effects of PAHs and snow melting agent (NaCl) sprinkled on road surfaces in winter. This study investigated and examined emerging toxicity by phototransformation products of PAHs with NaCl and heavy metals (Cu, Zn). As a result, ecological toxicity in coastal highway dusts was not clear, while high toxicity could be reproduced in simulated winter dusts (artificial sediment with PAHs and NaCl) by adding Catalyst (Cu, Zn).