Department of Environmental Science, School of Geography and Tourism, Shaanxi Normal University, Xi'an, 710119, China.
College of Resources and Environment, Baotou Normal College, Baotou, 014030, China.
Environ Geochem Health. 2024 Aug 28;46(10):403. doi: 10.1007/s10653-024-02191-0.
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, 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.
了解新兴工业化城市细颗粒道路尘（FRD）中潜在有毒金属（PTMs）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。本研究对中国西南喀斯特地区具有代表性的新兴工业化城市遵义的 FRD 中 PTMs 污染进行了综合调查。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，除 V 和 Co 外，均明显高于当地土壤背景值。FRD 中测定的 PTMs 综合污染水平很高，主要由 Zn 和 Cu 引起。遵义 FRD 中 PTMs 的来源包括交通、工业、建筑和自然源，分别占总 PTMs 含量的 38.0%、23.7%、21.9%和 16.4%。遵义 FRD 中 PTMs 总体生态风险水平较低至中等，主要由 Cu 和交通源引起。遵义 FRD 中 PTMs 的致癌风险对所有人群均较高。遵义 FRD 中 PTMs 的非致癌风险对成年人是可接受的，但对儿童不可忽视。根据特定来源的概率健康风险评估结果，优先控制源为工业源，优先控制 PTM 为 Cr。地方政府需要更加关注 FRD 中 PTMs 带来的致癌风险和健康危害。
