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Runoff From Coal Tar Pavement Sealants Harms Aquatic Species, USGS Studies Find

机译:USGS研究发现煤焦油路面密封剂的径流危害水生生物

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Rain running off pavement with coal tar-based sealants can be toxic to aquatic species at the base of the food chain, according to a study of the sealants announced by the U.S. Geological Survey. A second study found that stormwater runoff from coal tar-based pavement sealants damages the DNA of fish cells. The USGS announced both research findings April 13. The laboratory studies involve newly applied coal tar-based sealants. For many decades, the black liquid has been sprayed or painted on parking lots, driveways and playgrounds to protect the underlying asphalt and to fill in cracks in roadways. USGS: High Levels of PAHs in Sealants. According to the USGS, pavement sealants that contain coal tar have extremely high levels of polycyclic aromatic hydrocarbons (PAHs). Coal tar is a known human carcinogen, several PAHs are probable human carcinogens and some are toxic to fish and other aquatic life, the USGS said in a news release. Coal-tar sealants have significantly higher levels of PAHs and related compounds, compared with asphalt-based pavement sealants and other urban sources, including vehicle emissions, used motor oil and tire particles, USGS said.
机译:根据美国地质调查局公布的一项关于密封胶的研究显示,雨水与煤焦油基密封胶在人行道上可能对食物链底部的水生生物有毒。第二项研究发现,煤焦油路面密封胶产生的雨水径流会破坏鱼细胞的DNA。 USGS于4月13日宣布了两项研究结果。实验室研究涉及新应用的煤焦油基密封胶。数十年来,黑色液体已被喷涂或喷涂在停车场,车道和运动场上,以保护下面的沥青并填充道路裂缝。 USGS:密封胶中的PAHs含量高。根据USGS,含有煤焦油的路面密封胶具有极高的多环芳烃(PAHs)水平。 USGS在新闻稿中说,煤焦油是一种已知的人类致癌物,几种PAHs可能是人类致癌物,有些对鱼类和其他水生生物有毒。美国地质调查局表示,与沥青基路面密封胶和其他城市排放源(包括车辆排放物,用过的机油和轮胎颗粒)相比,煤焦油密封胶中PAHs和相关化合物的含量明显更高。

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    《Environment reporter》 |2015年第16期|1170-1171|共2页
  • 作者

    Jeff Day;

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