This study showcases the chemical fractionation and primary source identification of Cu, Zn and Cd in road-deposited sediment. Results show that Zn and Cd were identified as easily mobilised and biologically available metals that pose high risks to the receiving aquatic environments. However, Cu was released in substantial amounts only under relatively extreme conditions. With the assistance of principal component analysis and chemical fractionation, two primary contributors to heavy metals in road-deposited sediment were tentatively identified as vehicle-related sources (especially, auto brake pad erosion for Cu and tyre debris for Zn) and atmospheric deposition (especially for Cd).
The chemical fractionation and potential source identification of Cu, Zn and Cd on urban watershed
Jin Zhang, Pei Hua, Peter Krebs; The chemical fractionation and potential source identification of Cu, Zn and Cd on urban watershed. Water Sci Technol 1 October 2015; 72 (8): 1428–1436. doi: https://doi.org/10.2166/wst.2015.355
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