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Wet Dust Sampler—a Sampling Method for Road Dust Quantification and Analyses
VTI Swedish National Road and Transport Research Institute, Sweden; , KTH Royal Institute of Technology, Sweden.
VTI Swedish National Road and Transport Research Institute, Sweden.
VTI Swedish National Road and Transport Research Institute, Sweden.
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy.ORCID iD: 0000-0002-2679-2611
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2019 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 230, no 8, article id 180Article in journal (Refereed) Published
Abstract [en]

In northern countries, the climate, and consequently the use of studded tyres and winter traction sanding, causes accumulation of road dust over winter and spring, resulting in high PM10 concentrations during springtime dusting events. To quantify the dust at the road surface, a method—the wet dust sampler (WDS)—was developed allowing repeatable sampling also under wet and snowy conditions. The principle of operation is flushing high-pressurised water over a defined surface area and transferring the dust laden water into a container for further analyses. The WDS has been used for some time and is presented in detail to the international scientific community as reported by Jonsson et al. (2008) and Gustafsson et al. (2019), and in this paper, the latest version is presented together with an evaluation of its performance. To evaluate the WDS, the ejected water amount was measured, as well as water losses in different parts of the sampling system, together with indicative dust measurement using turbidity as a proxy for dust concentration. The results show that the WDS, when accounting for all losses, have a predictable and repeatable water performance, with no impact on performance based on the variety of asphalt surface types included in this study, given undamaged surfaces. The largest loss was found to be water retained on the surface, and the dust measurements imply that this might not have as large impact on the sampled dust as could be expected. A theoretical particle mass balance shows small particle losses, while field measurements show higher losses. Several tests are suggested to validate and improve on the mass balances. Finally, the WDS is found to perform well and is able to contribute to further knowledge regarding road dust implications for air pollution.

Place, publisher, year, edition, pages
Springer International Publishing , 2019. Vol. 230, no 8, article id 180
Keywords [en]
Method, Performance, Road dust, Road surface, Sampling
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39652DOI: 10.1007/s11270-019-4226-6Scopus ID: 2-s2.0-85069672194OAI: oai:DiVA.org:ri-39652DiVA, id: diva2:1341036
Note

Funding details: Trafikverket; Funding details: Suomen Ympäristökeskus; Funding details: VINNOVA; Funding details: City, University of London, City; Funding text 1: Open access funding provided by Swedish National Road and Transport Research Institute (VTI). This study was performed within a PhD program financiered by VTI and the Swedish Transport Administration.; Funding text 2: The authors wish to thank and acknowledge all involved in the development and evaluation of the WDS, including OptiDrift with financiers (project about optimising street operation and maintenance to minimise road dust in Stockholm, funded by VINNOVA, the Swedish Innovation Agency), Stockholm City, the Swedish Transport Administration, The Norwegian Public Roads Administration, Nordic Envicon Oy in Finland, the Finnish Environmental Institute (SYKE), VTI workshop and measurement laboratory as well as the students and other persons involved in development and evaluation of the WDS. 1 Personal correspondence with Anna Arvidsson, PhD., winter specialist at the Swedish National Road and Transport Research Institute, 2018-09-07.

Available from: 2019-08-07 Created: 2019-08-07 Last updated: 2019-08-07Bibliographically approved

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