Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden.
Water Environment Technology, Department of Architecture and Civil Engineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden; Swedish National Road and Transport Research Institute (VTI), Box 8072, SE-402 78, Gothenburg, Sweden.
J Environ Manage. 2024 Sep;367:121989. doi: 10.1016/j.jenvman.2024.121989. Epub 2024 Aug 3.
Tyre wear has been identified as a major road-related pollutant source, with road runoff transporting tyre wear particles (TWP) to adjacent soil, watercourses, or further through stormwater systems. The aim of this study was to investigate the occurrence and transport of TWP along a stormwater system. Water and sediment have been sampled at selected points (road runoff, gully pots, wells, outlet to a ditch, and stream) through a stormwater system situated along a highway in Sweden during November and December 2022, and March 2023. As there is limited data on the size distribution of TWP in different environmental media, especially in the size fraction <20 μm, the samples were fractioned into a fine (1.6-20 μm) and a coarse (1.6-500 μm) size fraction. The samples were analysed using a combination of marker compounds (benzene, α-methylstyrene, ethylstyrene, and butadiene trimer) for styrene-butadiene rubbers with PYR-GC/MS from which TWP concentration was calculated. Suspended solids were analysed in the water samples, and organic content was analysed in the sediment samples. TWP was found at nearly all locations, with concentrations up to 17 mg/L in the water samples and up to 40 mg/g in the sediment samples. In the sediment samples, TWP in the size fraction 1.6-20 μm represented a significant proportion (20-60%). Correlations were found between TWP concentration and suspended solids in the water samples (r = 0.87) and organic content in the sediment samples (r = 0.72). The results presented in this study demonstrate that TWP can be transported to the surrounding environment through road runoff, with limited retention in the studied stormwater system.
轮胎磨损已被确定为主要的道路相关污染源，道路径流将轮胎磨损颗粒 (TWP) 输送到相邻的土壤、水道或进一步通过雨水系统。本研究旨在调查 TWP 在雨水系统中的出现和迁移。在 2022 年 11 月至 12 月和 2023 年 3 月期间，沿瑞典一条高速公路的雨水系统中，在选定点（道路径流、沟壑盆、水井、沟渠出口和溪流）采集了水和沉积物样本。由于有关不同环境介质中 TWP 的大小分布的有限数据，特别是在 <20μm 的粒径范围内，因此将样品分为细（1.6-20μm）和粗（1.6-500μm）粒径级分。使用苯、α-甲基苯乙烯、乙基苯乙烯和丁二烯三聚体等标记化合物对苯乙烯-丁二烯橡胶进行分析，并使用 PYR-GC/MS 进行分析，从中计算出 TWP 浓度。在水样中分析了悬浮物，在沉积物样品中分析了有机含量。几乎在所有地点都发现了 TWP，水样中的浓度高达 17mg/L，沉积物中的浓度高达 40mg/g。在沉积物样品中，1.6-20μm 粒径级分中的 TWP 占很大比例（20-60%）。在水样中发现 TWP 浓度与悬浮物之间存在相关性（r=0.87），在沉积物样品中发现 TWP 浓度与有机含量之间存在相关性（r=0.72）。本研究结果表明，TWP 可以通过道路径流输送到周围环境中，在研究的雨水系统中有限保留。
