Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, 110819, People's Republic of China.
Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau, People's Republic of China.
Environ Geochem Health. 2022 Jun;44(6):1813-1826. doi: 10.1007/s10653-021-01161-0. Epub 2021 Nov 28.
To understand the current status of the contamination of potentially toxic elements (PTEs) after closing the Fushun Western Opencast Mine, this study has focused on the concentration, contamination assessment, and source identification of eight PTEs in weathered waste-rocks in four distinct areas of the mine. The mean concentrations of Ni, Cr, Zn, Cu, Pb, Hg, Cd, and As were 79.4, 86.3, 126, 64.8, 16.9, 1.04, 1.94, and 6.27 mg kg, respectively. The results demonstrated that Ni, Cr, Zn, Cu, Pb, Hg, Cd, and As were contaminated to different extents in different weathered waste-rocks and waste-rocks, among which there was considerable Cd contamination. Coal gangue area (CGA) exhibited the most polluted weathered waste-rocks, which can be attributed to severe pollution and moderate ecological hazards. Self-combustion gangue (SCG) contamination of waste-rocks was considerably serious and caused severe pollution and considerable ecological harm. Health risk assessments demonstrated that Hg had the highest non-carcinogenic risk. Ingestion of PTEs was found to be a primary route of exposure, while dermal and inhalation exposure was negligible. Principal component analysis (PCA) demonstrated that there were roughly three sources of PTEs in the weathered waste-rocks of the mine, natural sources related to the weathering of parent rocks, and human sources, including industrial emissions, mining activities, and atmospheric dust deposition and resuspension. This study advances our knowledge of PTEs in mines and provides policymakers with a reference for designing strategies to protect mine-based ecosystems.
为了了解抚顺西露天矿闭矿后潜在有毒元素（PTEs）的污染现状，本研究聚焦于矿区四个不同区域风化矸石山内八种 PTEs 的浓度、污染评估和来源识别。Ni、Cr、Zn、Cu、Pb、Hg、Cd 和 As 的平均浓度分别为 79.4、86.3、126、64.8、16.9、1.04、1.94 和 6.27mgkg。结果表明，Ni、Cr、Zn、Cu、Pb、Hg、Cd 和 As 在不同风化矸石和矸石中受到不同程度的污染，其中 Cd 污染较为严重。煤矸石区（CGA）风化矸石污染最严重，属于重度污染且具有中度生态危害。自燃矸石（SCG）对矸石的污染较为严重，属于重度污染且具有严重生态危害。健康风险评估表明 Hg 具有最高的非致癌风险。摄入 PTEs 是暴露的主要途径，而皮肤和吸入暴露则可以忽略不计。主成分分析（PCA）表明，矿区风化矸石中的 PTEs 大致有三种来源，分别是与母岩风化有关的自然源、工业排放、采矿活动、大气尘降和再悬浮等人为源。本研究增进了我们对矿山 PTEs 的了解，为制定保护矿山生态系统的策略提供了政策参考。
