Deep dive into the chronic toxicity of tyre particle mixtures and their leachates.
Deep dive into the chronic toxicity of tyre particle mixtures and their leachates.
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DOI：
10.1016/j.jhazmat.2024.133580
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发表时间：
2024-01
影响因子：
13.6
通讯作者：
P. Boisseaux;C. Rauert;Pradeep Dewapriya;Marie-Laure Delignette-Muller;Robyn Barrett;Lee Durndell;
中科院分区：
文献类型：
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作者：
P. Boisseaux;C. Rauert;Pradeep Dewapriya;Marie-Laure Delignette-Muller;Robyn Barrett;Lee Durndell;
来自汽车轮胎胎面的颗粒是一种全球性污染物，平均每辆汽车每年向环境排放约1.4千克。在这项研究中，流行的轮胎品牌被用来产生轮胎胎面微粒混合物。在一种水生测试物种（大型蚤）上比较了颗粒物和化学沥滤物的慢性毒性。在21天的接触中，原始轮胎胎面微粒的毒性（LC 50 60 mg.L-1）高于单独的化学浸出物（LC 50 542 mg.L-1）。微粒和沥滤物在环境相关浓度下对生殖和形态发育表现出明显的影响，消化道中可见的微粒摄取量具有剂量依赖性。沥滤液的化学表征显示锌、钛和锶的金属占优势。在存在的众多有机化学品中，至少有54种在所有5个轮胎品牌中共享，其中许多被归类为非常有毒。我们的研究结果提供了关于轮胎胎面颗粒毒性和从中浸出的相关化学品的迫切需要的信息，以告知未来的缓解措施。我们的结论是，轮胎颗粒是特别令人关切的危险污染物，在某些地方接近或可能超过慢性环境安全限值。
Particles from the tread of vehicle tyres are a global pollutant, which are emitted into the environment at an approximate rate of 1.4 kg.year−1for an average passenger-car. In this study, popular tyre brands were used to generate a tyre tread microparticle mixture. The chronic toxicity of both particles and chemical leachates were compared on a planktonic test species (Daphnia magna). Over 21 days of exposure, pristine tyre tread microparticles were more toxic (LC50 60 mg.L−1) than chemical lechates alone (LC50 542 mg.L−1). Microparticles and leachates showed distinct effects on reproduction and morphological development at environmentally relevant concentrations, with dose-dependent uptake of particles visible in the digestive tract. Chemical characterization of leachates revealed a metal predominance of zinc, titanium, and strontium. Of the numerous organic chemicals present, at least 54 were shared across all 5 tyre brands, with many classified to be very toxic. Our results provide a critically needed information on the toxicity of tyre tread particles and the associated chemicals that leach from them to inform future mitigation measures. We conclude that tyre particles are hazardous pollutants of particular concern that are close to or possibly above chronic environmental safety limits in some locations.