Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.scitotenv.2023.166679 |
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| Title (Primary) | Accelerated aging of tire and road wear particles by elevated temperature, artificial sunlight and mechanical stress — A laboratory study on particle properties, extractables and leachables |
| Author | Weyrauch, S.; Seiwert, B.; Voll, M.; Wagner, S.; Reemtsma, T. |
| Source Titel | Science of the Total Environment |
| Year | 2023 |
| Department | ANA |
| Volume | 904 |
| Page From | art. 166679 |
| Language | englisch |
| Topic | T9 Healthy Planet |
| Abstract | Tire and road wear particles (TRWP) are generated in large quantity by
automobile traffic on roads but their way of degradation in the environment is
largely unclear. Laboratory experiments were performed on the effect of elevated
temperature (simulating 2–3 years), sunlight exposure (simulating 0.5 years)
and mechanical stress on the physical properties and chemical composition of
TRWP and of cryo-milled tire tread (CMTT). No significant effects were observed
of the applied mechanical stress on mean properties of pristine particles.
After sunlight exposure up to 40 % in mass were lost from the TRWPs, likely due
to the loss of mineral incrustations from their surface. The chemical
composition of TRWP and CMTT was characterized by determining 27 compounds,
antioxidants (phenylene diamines), vulcanization agents (benzothiazoles and
guanidines) and their transformation products (TPs). Extractables of TRWP
(580–850 μg/g) were dominated by TPs, namely benzothiazolesulfonic acid (BTSA).
CMTT showed much higher amounts of extractables (4600 μg/g) which were
dominated by parent chemicals such as N-(1,3-dimethylbutyl)-N′-phenyl-1,4-phenylenediamine
(6-PPD), diphenylguanidine (DPG) and mercaptobenzothiazole (MBT). Sunlight
exposure affected the amount of extractables more strongly than elevated
temperature, for TRWP (−45 % vs −20 %) and CMTT (−80 % vs −25 %) and provoked a
clear shift from parent compounds to their TPs. After sunlight exposure
extractables of TRWP were dominated by BTSA and DPG. Sunlight exposure
drastically reduced the 6-PPD amount extracted from both, TRWP and CMTT (−93 %,
−98 %), while its quinone (6-PPDQ) increased by around 1 % of the 6-PPD
decrease, only. For many TPs, concentration in leachates were higher than in
extracts, indicating ongoing transformation of their parent compounds during leaching.
These results highlight that abiotic aging of TRWPs leads to strong changes in
their chemical composition which affect their particle properties and are of
relevance for the environmental exposure to tire-related chemicals.
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| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=27860 |
| Weyrauch, S., Seiwert, B., Voll, M., Wagner, S., Reemtsma, T. (2023): Accelerated aging of tire and road wear particles by elevated temperature, artificial sunlight and mechanical stress — A laboratory study on particle properties, extractables and leachables Sci. Total Environ. 904 , art. 166679 10.1016/j.scitotenv.2023.166679 |
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