Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
Chemosphere. 2021 Jun;273:129656. doi: 10.1016/j.chemosphere.2021.129656. Epub 2021 Jan 18.
Sources of heavy metals (As, Cd, Co, Cr, Cu, Mn, Ni, Pb and Zn) in the road dust of Bandar Abbas city, Iran, and its west suburb were apportioned and the related source-specific ecological and health risks were assessed. The level of heavy metal pollution and the related ecological risk for suburban road dust (suburban RD) were far higher than those of urban RD. Accordingly, probabilistic health risk assessment showed no significant health risk in urban region but significant health risk in the suburb, especially for As with cancer risk above 10. Source apportionment using positive matrix factorization (PMF) identified lithogenic source (45.9%) and traffic emission (47.6%) as the main sources of heavy metals in urban and suburban regions, respectively. However, the industrial/construction activities showed the main contribution in ecological risk in both regions. On the other hand, the health risks in urban and suburban regions were mainly attributed to lithogenic source (49.7% for non-cancer risk and 36.8% of cancer risk) and traffic emission (69.4% of non-cancer risk and 46.6% of cancer risk), respectively. The sensitivity analysis showed that the Pb and As originated from traffic emission had the most impact on the non-cancer and cancer risks, respectively, in the suburb. Therefore, this study highlighted the concern about traffic emission as a critical heavy metal source in the road dust of Bandar Abbas suburb.
伊朗班达尔阿巴斯市及其西郊道路尘埃中重金属（砷、镉、钴、铬、铜、锰、镍、铅和锌）的来源进行了分配，并评估了相关来源的特定生态和健康风险。郊区道路尘埃（郊区 RD）的重金属污染水平和相关生态风险远高于城市 RD。因此，概率健康风险评估显示城市地区没有显著的健康风险，但郊区存在显著的健康风险，特别是对于砷，其癌症风险超过 10。使用正定矩阵因子分解（PMF）的源分配确定了岩石源（45.9%）和交通排放（47.6%）分别是城市和郊区重金属的主要来源。然而，在这两个地区，工业/建筑活动对生态风险的贡献最大。另一方面，城市和郊区的健康风险主要归因于岩石源（非癌症风险的 49.7%和癌症风险的 36.8%）和交通排放（非癌症风险的 69.4%和癌症风险的 46.6%）。敏感性分析表明，来自交通排放的 Pb 和 As 对郊区的非癌症和癌症风险的影响最大。因此，本研究强调了交通排放作为班达尔阿巴斯郊区道路尘埃中关键重金属源的关注。
