Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Chaozhou, 521031, China; Faculty of Materials Science and Chemistry, China University of Geosciences(Wuhan), Wuhan, 430074, China.
Shenzhen Bay Laboratory, Shenzhen, 518132, China.
Chemosphere. 2021 May;271:129546. doi: 10.1016/j.chemosphere.2021.129546. Epub 2021 Jan 5.
For the first time, a field survey was conducted to investigate the present situation, vertical distribution and ecological risks of heavy metals (Cu, Zn, Mn, Cr, Pb and As) from 21 in-situ samples drilled out from Yeshan iron mine tailings in the Jiangsu Province of China. The heavy metal contents obtained for the tailing wastes in decreasing order were as follows: Mn > Cu > Zn > As > Cr > Pb. The contents of heavy metals varied with depth, and the variation trends were not completely consistent. Vertical distribution profiles showed that heavy metals accumulated in certain strata. Both the monomial potential ecological risk factor (E) and the risk quotient (RQ) showed a high ecological risk for Cu, Mn and As. The comprehensive ecological risk index (RI) also indicated that the wastes presented a high ecological risk level, to which Cu, Mn and As were the key contributors. Our study showed that the health of individuals, especially children, living in the mining-impacted areas could be affected by the potential noncarcinogenic risk of copper, manganese and the carcinogenic risk of arsenic.
首次对江苏省冶山铁矿尾矿库开展了现场调查，研究了矿区内 21 个原位钻孔样品中重金属（Cu、Zn、Mn、Cr、Pb 和 As）的现状、垂直分布及生态风险。尾矿中重金属含量从大到小依次为 Mn＞Cu＞Zn＞As＞Cr＞Pb。重金属含量随深度而变化，且变化趋势并不完全一致。垂直分布特征表明重金属在某些地层中累积。单项潜在生态风险因子（E）和风险商（RQ）均表明 Cu、Mn 和 As 具有高生态风险。综合生态风险指数（RI）也表明，这些尾矿库具有较高的生态风险水平，其中 Cu、Mn 和 As 是主要贡献因子。本研究表明，生活在矿区及其周边的个人，尤其是儿童，可能面临铜、锰的潜在非致癌风险和砷的致癌风险。
