Poster Presentation Society of Environmental Toxicology and Chemistry Australasia 2023

Road to contamination: Quantification and identification of tyre wear particles in balcony dust (#211)

Simran Kaur 1 , Cassandra Rauert 1 , Kevin Thomas 1
  1. Queensland Alliance for Environmental Health Sciences, Brisbane, QLD

Tyre wear particles (TWP) are globally recognized as one of the largest sources of microplastic particles in the environment. The friction caused by mechanical abrasion between tyres and road surfaces leads to the emission of TWP (Kole et al., 2017). TWP are concerning due to the presence of additive chemicals incorporated during manufacturing that can be released into the surrounding environment (Klöckner et al., 2021; Rauert et al., 2022).  Through various transport mechanisms, such as wind and runoff, these particles can be carried from road surfaces to adjacent lands, leading to the contamination of ecosystems and potential exposure to organisms and humans. This preliminary study, therefore, investigates the composition and distribution of TWP in balcony dust. For the same, balconies of varying distance from local traffic sources/highways were sampled to determine if a trend between concentrations and distance to source could be determined. A total number of 5 home balconies were sampled. Pre-wetted wipes with filtered MilliQ water were used to collect dust on a (30*30) cm2 balcony floor area. The collected wipes were then analysed using Pyrolysis coupled to gas chromatography and mass spectrometry (Py GC-MS) to quantify tyre rubber using 4-vinylcyclohexene (4-VCH), SB dimer and SBB trimer as tyre markers. As a result, balcony dust wipes provide a simple means to quantify tyre wear particles and to present a trend between TWP concentrations and distance to the traffic sources.