Polukarova Maria, Gaggini Elly Lucia, Rødland Elisabeth, Sokolova Ekaterina, Bondelind Mia, Gustafsson Mats, Strömvall Ann-Margret, Andersson-Sköld Yvonne
Swedish National Road and Transport Research Institute Gothenborg (VTI), Regnbågsgatan 1, 417 55, Gothenburg, Sweden; Chalmers University of Technology, Department of Architecture and Civil Engineering, Water Environment Technology, SE-412 96, Gothenburg, Sweden.
Chalmers University of Technology, Department of Architecture and Civil Engineering, Water Environment Technology, SE-412 96, Gothenburg, Sweden.
Environ Pollut. 2025 May 1;372:125971. doi: 10.1016/j.envpol.2025.125971. Epub 2025 Mar 3.
Tyre wear particles (TWP) pose significant environmental concerns, necessitating a comprehensive understanding of their environmental distribution for accurate risk assessment. Roadside soil has not been extensively studied for TWP occurrence and distribution. This study aims to characterise the occurrence and distribution of TWP and associated metals in roadside soils and to investigate the correlations between these contaminants. Soil samples were collected from two road ditches along a Swedish national motorway at varying depths and distances from the contamination source. TWP in fractions <500 μm were analysed using PYR-GC/MS. Results indicated that TWP concentrations in soil samples ranged from 0.74 ± 0.20 to 12.40 ± 1.88 mg/kg d.w., consistent with other studies, and decreased with distance from the road, similar to Zn. In one ditch, TWP concentrations remained constant with depth, unlike concentrations of Co and Cr, which increased, while in the other ditch, TWP and most metals did not decrease with depth or distance from the outlet. Strong correlations were found between concentrations of TWP and Zn in one, but not the other, where Zn might have followed different transport due to leaching. Metal correlations in both ditches suggest traffic-related but not necessarily tyre wear origins. These findings are crucial for risk assessments of traffic-related pollutants, particularly TWP, and their spread into soils.
轮胎磨损颗粒（TWP）引发了重大的环境问题，因此有必要全面了解其环境分布情况，以便进行准确的风险评估。对于路边土壤中TWP的存在和分布，尚未进行广泛研究。本研究旨在描述路边土壤中TWP及相关金属的存在和分布特征，并研究这些污染物之间的相关性。沿着瑞典一条国家高速公路的两条路边沟渠，在不同深度和距污染源不同距离处采集土壤样本。使用PYR-GC/MS分析粒径小于500μm的颗粒中的TWP。结果表明，土壤样本中TWP的浓度范围为0.74±0.20至12.40±1.88mg/kg干重，与其他研究结果一致，并且与锌类似，随着与道路距离的增加而降低。在一条沟渠中，TWP浓度随深度保持不变，这与钴和铬的浓度不同，钴和铬的浓度随深度增加，而在另一条沟渠中，TWP和大多数金属的浓度并未随深度或距排水口的距离而降低。在其中一条沟渠中发现TWP浓度与锌浓度之间存在强相关性，而在另一条沟渠中则没有，在另一条沟渠中，锌可能由于淋溶而有不同的迁移方式。两条沟渠中的金属相关性表明与交通有关，但不一定源于轮胎磨损。这些发现对于与交通相关的污染物，特别是TWP及其在土壤中的扩散的风险评估至关重要。
