Tires are a major source of synthetic and natural rubber particles, metals and organic compounds, in which several compounds are linked to negative environmental impact. Recent advances in material technology, coupled with focus on sustainability, have introduced a new range of tires, sold as “green, sustainable, and eco-friendly”. Although these “green” tires may have lower impact on the environment on a global scale, there is no current knowledge about the chemical composition of “green” tires, and whether they are more eco-friendly when considering the release of tire wear particles or tire-associated chemicals. Here we have investigated the chemical composition of nine “green” vehicle tires, one “green” bike tire and seven “conventional” vehicle tires. No significant difference was found between “green” and “conventional” tires tested in this study. For N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), the average concentration in “green” tires were higher (16 ± 7.8 µg/mg) compared to “conventional” tires (8.7 ± 4.5 µg/mg). The relationship between metals, selected organic compounds and rubbers demonstrated large variation across brands, and lower variability between tires grouped according to their seasonal use. This study indicates that more work is needed to understand how the shift towards sustainable tires might change the chemical composition of tires.

中文翻译：

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环保的“绿色”轮胎在化学上也是绿色的吗？比较绿色轮胎和传统轮胎中的金属、橡胶和选定的有机化合物


轮胎是合成和天然橡胶颗粒、金属和有机化合物的主要来源，其中几种化合物与负面环境影响有关。材料技术的最新进展，加上对可持续性的关注，推出了一系列新的轮胎，以“绿色、可持续和环保”的名义出售。尽管这些“绿色”轮胎在全球范围内对环境的影响可能较小，但目前尚不清楚“绿色”轮胎的化学成分，以及在考虑轮胎磨损颗粒的释放或释放时它们是否更环保。与轮胎相关的化学品。在这里，我们研究了九种“绿色”汽车轮胎、一种“绿色”自行车轮胎和七种“传统”汽车轮胎的化学成分。本研究中测试的“绿色”轮胎和“传统”轮胎之间没有发现显着差异。对于 N-(1,3-二甲基丁基)-N'-苯基-对苯二胺 (6PPD)，“绿色”轮胎中的平均浓度 (16 ± 7.8 µg/mg) 高于“传统”轮胎 (8.7 ± 4.5 微克/毫克）。金属、选定的有机化合物和橡胶之间的关系表明，不同品牌之间存在很大差异，而根据季节性使用分组的轮胎之间的差异较小。这项研究表明，需要做更多的工作来了解向可持续轮胎的转变可能如何改变轮胎的化学成分。