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Traffic-related microplastic particles, metals, and organic pollutants in an urban area under reconstruction
Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.ORCID iD: 0000-0003-4815-8299
Chalmers University of Technology.
IVL, Swedish Environmental Research Institute.
Sustainable Waste and Water, City of Gothenburg.
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2021 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 774, article id 145503Article in journal (Refereed) Published
Abstract [en]

In urban environments, particularly areas under reconstruction, metals, organic pollutants (OP), and microplastics (MP), are released in large amounts due to heavy traffic. Road runoff, a major transport route for urban pollutants, contributes significantly to a deteriorated water quality in receiving waters. This study was conducted in Gothenburg, Sweden, and is unique because it simultaneously investigates the occurrence of OP, metals, and MP on roads and in stormwater from an urban area under reconstruction. Correlations between the various pollutants were also explored. The study was carried out by collecting washwater and sweepsand generated from street sweeping, road surface sampling, and flow-proportional stormwater sampling on several occasions. The liquid and solid samples were analyzed for metals, polycyclic aromatic hydrocarbons (PAH), oxy-PAH, aliphatics, aromatics, phthalates, and MP. The occurrence of OP was also analyzed with a non-target screening method of selected samples. Microplastics, i.e. plastic fragments/fibers, paint fragments, tire wear particles (TWP) and bitumen, were analyzed with a method based on density separation with sodium iodide and identification with a stereo microscope, melt-tests, and tactile identification. MP concentrations amounted to 1500 particles/L in stormwater, 51,000 particles/L in washwater, and 2.6 × 106 particles/kg dw in sweepsand. In stormwater, washwater and sweepsand, MP ≥20 μm were found to be dominated by TWP (38%, 83% and 78%, respectively). The results confirm traffic as an important source to MP, OP, and metal emissions. Concentrations exceeding water and sediment quality guidelines for metals (e.g. Cu and Zn), PAH, phthalates, and aliphatic hydrocarbons in the C16–C35 fraction were found in most samples. The results show that the street sweeper collects large amounts of polluted materials and thereby prevents further spread of the pollutants to the receiving stormwater. © 2021 Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier B.V. , 2021. Vol. 774, article id 145503
National Category
Water Engineering
Identifiers
URN: urn:nbn:se:vti:diva-15989DOI: 10.1016/j.scitotenv.2021.145503Scopus ID: 2-s2.0-85101395399OAI: oai:DiVA.org:vti-15989DiVA, id: diva2:1536626
Available from: 2021-03-11 Created: 2021-03-11 Last updated: 2022-11-07Bibliographically approved
In thesis
1. Occurrence of Traffic-Derived Microplastics in Different Matrices in the Road Environment
Open this publication in new window or tab >>Occurrence of Traffic-Derived Microplastics in Different Matrices in the Road Environment
2022 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The prevalence of microplastic contamination has raised concerns about the potential risk andimpact on the global environment. Traffic-derived microplastics, i.e., tire wear particles (TWP),polymer-modified bitumen, and road markings contribute to the emissions, and TWP areassumed to be one of the largest sources of microplastic emissions. Due to analyticaldifficulties, there is still a knowledge gap regarding transport routes, environmentalconcentrations, and toxicity. This thesis aims to investigate the occurrence of traffic-derivedmicroplastics in several traffic environments and thereby increase the understanding of theparticles.

Place, publisher, year, edition, pages
Göteborg: Chalmers, 2022. p. 68
Series
Doktorsavhandlingar vid Chalmers tekniska högskola, ISSN 0346-718X ; 5141
National Category
Infrastructure Engineering Environmental Sciences
Identifiers
urn:nbn:se:vti:diva-19104 (URN)9789179056759 (ISBN)
Public defence
2022-10-21, 10:00
Opponent
Supervisors
Available from: 2022-11-07 Created: 2022-11-07 Last updated: 2022-12-02Bibliographically approved

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Järlskog, IdaPolukarova, MariaGustafsson, MatsAndersson-Sköld, Yvonne

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