Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 413, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.125355
Keywords
Road dust mineralogy; XRF analysis; Glass microspheres; Microscope identification; Microanalysis
Categories
Funding
- National Science Center, Poland [2019/35/B/ST10/00821]
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Glass microspheres are widely used as reflective components in road and pavement marking materials. They are able to be distinguished from other morphologically similar particles in road dust. In Kielce road dust, glass microspheres range from 30 to 1350 ?m in diameter and consist mainly of recycled Ca-, Na-, Mg-silica glass with minor admixtures. They serve as good markers of traffic-related pollution in different environmental archives.
Glass microspheres are widely used as reflective components in road and pavement marking materials. They commonly occur in road dust mixed with different particles of anthropogenic and geogenic origin. This paper describes different methods that enable discrimination of glass microspheres from other morphologically similar particles that occur in road dust of Kielce. The individual glass microspheres vary from 30 to 1350 ?m in diameter and consist of recycled Ca-, Na-, Mg-silica glass with a minor admixture of Al, Fe, K and S. Because of their stability and chemical composition, glass microspheres are good markers of traffic-related pollution in different environmental archives. Of different elements present in Kielce road dust, the fraction < 0.125 mm was distinctly abundant in zirconium, the main constituent of disk brakes or brake pads and a potential marker of road traffic pollution. However, the statistically significant positive correlation of the Si?Zr pair (R = 0.54) in the 1.0?2.0 mm fraction is linked to the presence of some detritic quartz grains with zircon inclusions. The other metals determined provide ambiguous traffic-related signatures and may be derived from different pollution sources.
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