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Copper, Zn and Pb isotope ratios are important tracers for understanding geological and biological processes. We present optimised column separation methods using an anion exchange resin for Cu and Zn, and a Pb-specific resin for Pb, and provide Cu, Zn and Pb isotope data for thirty-three commercially available geological and biological reference materials (RMs) using MC-ICP-MS. Our measurement procedures can be applied to various environmental samples. The Cu, Zn and Pb yields were higher than 99.2%, and isotopic fractionation did not occur during column separation. Copper and Zn delta values of AGV-2, BCR-2, BIR-1a, BHVO-2, GSP-2, NOD-A-1, NOD-P-1, DOLT-4, BCR-414, BCR-279 and NIST SRM 1573a were in good agreement with previously reported values. The intermediate measurement precision for Cu and Zn delta values was better than AE 0.02‰ (2s). The δ 65 Cu NIST976 , δ 66 Zn JMC and 206 Pb/ 207 Pb values determined in this study ranged from -0.19 to +0.73‰, -0.96 to +1.00‰ and 1.1172 to 1.2263, respectively. The δ 66 Zn JMC variability (Δ 66 Zn max-min ) in this study was relatively larger than that of δ 65 Cu NIST976 variability (Δ 65 Cu max-min ). A combination of Cu, Zn and Pb isotopes can be used as potential environmental tracers to track the origins of these elements in the environment as well as to understand their influence on organisms.

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The pollution status of ten potentially toxic elements (PTEs), isotopic compositions (Cu, Zn, Pb), and the potential ecological risk posed by them were investigated in the PM10 fraction of road dust in Busan Metropolitan city, South Korea. Enrichment factors revealed extremely to strongly polluted levels of Sb, Cd, Zn, Pb, and Cu in the PM10 fraction of road dust, with Sb levels being the highest. Statistical analyses showed that the major cause for contamination with PTEs was non-exhaust traffic emissions such as tire and brake wear. Cu and Zn isotopic compositions of road dust were related to traffic-related emission sources such as brake and tires. Pb isotopic compositions were close to that of road paint, indicating that Pb was a different source from Cu and Zn in this study. No significant health risk was posed by the PTEs. Taking into account the total length of road in Busan, a high quantity of PTEs in road dust (PM10) can have serious deleterious effects on the atmospheric environment and ecosystems. The results of metal concentrations and isotopic compositions in road dust will help identify and manage atmospheric fine particle and coastal metal contamination derived from fine road dust.

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