了解新兴工业化城市细小道路灰尘（FRD）中潜在有毒金属（PTM）的污染状况并确定优先控制因素对于城市环境管理、居民健康保护和污染控制至关重要。本研究对西南喀斯特地区具有代表性的新兴工业化城市遵义市FRD的PTMs污染情况进行了全面调查。 FRD 中 Ni、Cr、Mn、Cu、Zn、Ba、Pb、V 和 Co 的平均含量分别为 43.2、127.0、1232.1、134.4、506.6、597.8、76.1、86.8 和 16.2 mg kg-1 ，除V和Co外，均明显高于当地土壤相应背景水平。FRD中测定的PTMs综合污染水平很高，主要由Zn和Cu造成。遵义FRD PTMs来源为交通源、工业源、建筑源和自然资源源，分别占PTMs总含量的38.0%、23.7%、21.9%和16.4%。遵义FRD的PTM总体表现出低至中等的生态风险水平，主要由铜和交通源贡献。遵义 FRD 地区所有人群的 PTM 癌症风险均较高。遵义FRD中PTMs的非致癌风险对于成人来说是可以接受的，但对于儿童来说却不能忽视。根据源特定概率健康风险估算结果，优先控制源为工业源，优先控制PTM为Cr。地方政府需要更多地关注 FRD 中 PTM 带来的致癌风险和健康危害。© 2024。作者获得 Springer Nature B.V. 独家许可。

Understanding the pollution situation of potentially toxic metals (PTMs) in fine road dust (FRD) in emerging industrialized cities and identifying priority control factors is crucial for urban environmental management, resident health protection, and pollution control. This study conducted a comprehensive investigation on PTMs pollution in FRD in Zunyi, a representative emerging industrialized city in the karst region of southwestern China. The average contents of Ni, Cr, Mn, Cu, Zn, Ba, Pb, V, and Co in the FRD were 43.2, 127.0, 1232.1, 134.4, 506.6, 597.8, 76.1, 86.8, and 16.2 mg kg-1, respectively, which were obviously higher than the corresponding background levels of the local soil except for V and Co. The comprehensive pollution level of the determined PTMs in the FRD was very high, primarily caused by Zn and Cu. The sources of PTMs in Zunyi FRD were traffic, industrial, construction, and natural sources, accounting for 38.0, 23.7, 21.9, and 16.4% of the total PTMs content, respectively. The PTMs in Zunyi FRD exhibited a low to moderate overall ecological risk level, mainly contributed by Cu and traffic source. The cancer risks of PTMs in Zunyi FRD were high for all populations. The non-carcinogenic risk of PTMs in Zunyi FRD was acceptable for adults, but cannot be ignored for children. According to the source-specific probabilistic health risk estimation results, the priority control source is industrial source and the priority control PTM is Cr. Local governments need to give more attention to the carcinogenic risks and health hazards posed by PTMs in the FRD.© 2024. The Author(s), under exclusive licence to Springer Nature B.V.