Abstract
The current work aimed to discriminate urban pollution sources using the zinc isotope ratio as a tracer. The study was conducted on the example of the large industrial city of Ekaterinburg, Russia. The urban surface-deposited sediment (USDS) collected in the multistory residential areas was analyzed as a geoindicator. The USDS represents a geochemical trap in an urban environment and reflects an area’s contemporary urban geochemical conditions and their changes over time. USDS samples were collected from an irregular grid in the city during 2007–2010. Sample decomposition was conducted using a mixture of acids (HF, HNO3, and HCl). Zn isotope ratios were measured using MC-ICP-MS Neptune Plus (Thermo Fischer, Germany). The isotope ratios were reported as δ66Zn relative to the JMC-Lyon certified isotopic standard. Zinc isotope ratios in USDS samples varied from −1.00 to +0.49‰. 84% of investigated USDS samples in Ekaterinburg have a zinc isotope ratio, corresponding to road traffic and non-exhaust emissions (−0.50 to +0.49‰). The δ66Zn values in the residential districts near the city's railway were −1.0 to −0.6‰; the value near the Railway Station was −0.29‰; next to highways were from −0.5 to −0.3‰.
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Acknowledgements
This work was carried out at the UB RAS “Geoanalitik” Center for Collective Use and supported by the Russian Foundation for Basic Research (RFBR), grant No. 19-35-60011. The equipment and comprehensive development of the “Geoanalitik” shared research facilities of the IGG UB RAS is financially supported by the grant of the Ministry of Science and Higher Education of the Russian Federation for 2021–2023 (Agreement No. 075-15-2021-680).
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Okuneva, T., Seleznev, A., Kiseleva, D., Soloshenko, N. (2023). Study of Zn Pollution of a Large City Based on Analysis of Stable Zinc Isotope Ratios in Urban Surface-Deposited Sediments. In: Çiner, A., et al. Recent Research on Environmental Earth Sciences, Geomorphology, Soil Science, Paleoclimate, and Karst. MedGU 2021. Advances in Science, Technology & Innovation. Springer, Cham. https://doi.org/10.1007/978-3-031-42917-0_3
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