Causes of highway road dust toxicity to an estuarine amphipod: Evaluating the effects of nicotine
Causes of highway road dust toxicity to an estuarine amphipod: Evaluating the effects of nicotine
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DOI：
10.1016/j.chemosphere.2016.11.122
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发表时间：
2017-02-01
期刊：
影响因子：
8.8
通讯作者：
Tobino, Tomohiro
中科院分区：
文献类型：
--
作者：
Hiki, Kyoshiro;Nakajima, Fumiyuki;Tobino, Tomohiro
城市道路灰尘如果排入受纳沃茨，可能对生态系统产生不利影响。本研究以河口端足类日本格兰迪雷拉为材料，通过沉积物毒性鉴定评价（TIE）试验，探讨了高速公路路面粉尘毒性的成因。除了传统上被认为是道路径流中主要有毒物质的金属和多环芳烃外，我们还将重点放在溶解的尼古丁作为致病毒物上。沉积物TIE结果表明，有机污染物的毒性贡献最大，和未电离尼古丁的毒性的贡献是最高的化学品中考虑。然而，额外的死亡率测试与48小时脉冲尼古丁暴露表明，暴露于尼古丁在相同浓度的基线水平在TIE测试并没有导致显着的10天片脚类动物死亡率。因此，道路灰尘毒性不能仅用未电离尼古丁来解释，从而表明测量的毒物和其他未测量因素的存在的联合作用的贡献。(C)2016爱思唯尔有限公司版权所有
Urban road dust can potentially have adverse effects on ecosystems if it is discharged into receiving waters. This study investigated the causes of highway road dust toxicity by performing sediment toxicity identification evaluation (TIE) tests with an estuarine amphipod, Grandidierella japonica. In addition to metals and polycyclic aromatic hydrocarbons, which are traditionally considered to be the major toxicants in road runoff, we focused on dissolved nicotine as a causative toxicant. The sediment TIE results suggested that organic contaminants contributed to the majority of toxicity, and that the contribution of unionized nicotine to the toxicity was the highest among the chemicals considered. However, additional mortality tests with 48-h pulsed nicotine exposure demonstrated that exposure to nicotine at the same concentration as the baseline level in TIE tests did not cause significant 10-day amphipod mortality. Thus, the road dust toxicity could not be explained only by unionized nicotine, thereby suggesting contributions from joint effects of the measured toxicants and the presence of other unmeasured factors. (C) 2016 Elsevier Ltd. All rights reserved.