埃塞俄比亚拉利贝拉镇和塞科塔镇道路灰尘中潜在有毒金属的健康和生态风险评估。
Health and ecological risk assessment of potentially toxic metals in road dust at Lalibela and Sekota towns, Ethiopia.
机构信息
Department of Chemistry, College of Natural and Computational Science, Woldia University, P.O. Box 400, Woldia, Ethiopia.
Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia.
出版信息
Environ Monit Assess. 2023 May 30;195(6):765. doi: 10.1007/s10661-023-11406-3.
The ecological and health problems resulted from heavy metals (Mn, Fe, Ni, Co, Cu, Zn, Cd, Hg, Pb, As, and Cr) in the road dust in the towns of Sekota and Lalibela, Ethiopia were assessed. The average heavy metal concentrations were ranged from 0.088 (Cd) to 2.714 (Fe) mg/kg. Individual metal and cumulative metals pollution levels in both towns revealed that Lalibela is moderately polluted by Zn, Pb, and Ni and Sekota being moderately polluted by Zn, Pb, Ni, As, Hg, and Cu. Furthermore, the United States Environmental Protection Agency's health risk evaluation model showed that the total heavy metal health risk levels in the road dust ranged from 5.71 × 10 (adult) to 2.57 × 10 (children), with an average risk of 7.35 × 10. Lalibela was found to have higher chance of risk than Sekota. The total lifetime cancer risk varied from 4.51 × 10 (for adults, Sekota) to 7.75 × 10 (for children, Lalibela), with a mean risk of 6.12 × 10 implying a low chance of getting cancer. The hazard quotient and hazard index of all the metals were below the limit. In general, children were found to be more susceptible than adults.
评估了埃塞俄比亚塞科塔和拉利贝拉镇道路灰尘中重金属（Mn、Fe、Ni、Co、Cu、Zn、Cd、Hg、Pb、As 和 Cr）对生态和健康造成的问题。重金属的平均浓度范围为 0.088（Cd）至 2.714（Fe）mg/kg。两个城镇的单个金属和累积金属污染水平表明，拉利贝拉镇受 Zn、Pb 和 Ni 的中度污染，而塞科塔镇受 Zn、Pb、Ni、As、Hg 和 Cu 的中度污染。此外，美国环境保护署的健康风险评估模型显示，道路灰尘中的重金属总健康风险水平范围为 5.71×10（成人）至 2.57×10（儿童），平均风险为 7.35×10。拉利贝拉镇的风险几率高于塞科塔镇。终身癌症总风险从 4.51×10（成人，塞科塔）到 7.75×10（儿童，拉利贝拉）不等，平均风险为 6.12×10，表明患癌症的几率较低。所有金属的危害系数和危害指数均低于限值。总的来说，儿童比成人更容易受到影响。
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