Occurrences of Tire Rubber-Derived Contaminants in Cold-Climate Urban Runoff
نویسندگان
چکیده
Recent findings that 2-anilo-5-[(4-methylpentan-2-yl)amino]cyclohexa-2,5-diene-1,4-dione (6PPD-quinone), the transformation product of a common tire rubber antioxidant, is acutely toxic in stormwater-impacted streams has highlighted need for better understanding contaminants urban runoff. This study represents one first reports 6PPD-quinone and other rubber-derived compounds stormwater snowmelt cold-climate Canadian city (Saskatoon, 2019–2020). Semiquantification five target compounds, N,N?-diphenylguanidine (DPG), N,N-dicyclohexylmethylamine (DCA), N,N?-dicyclohexylurea (DCU), 1-cyclohexyl-3-phenylurea (CPU), 6PPD-quinone, revealed DPG was most abundant, with average concentrations 60 ?g L–1 1 snowmelt. Maximum observed were greater than 300 L–1, equivalent to loadings 15 kg from single rain event. These represent some highest reported runoff globally. 6PPD-Quinone detected 57% (12/21) samples mean concentration approximately 600 ng (2019) 80% (28/31) 80–370 (2019 2020). Concentrations exceeded acute LC50 coho salmon (0.8–1.2 L–1) 20% samples. Mass all chemicals correlated well roads residential land-use area.
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ژورنال
عنوان ژورنال: Environmental Science and Technology Letters
سال: 2021
ISSN: ['2328-8930']
DOI: https://doi.org/10.1021/acs.estlett.1c00682