Spatial analysis, source identification and risk assessment of heavy metals in a coal mining area in Henan, Central China
Spatial analysis, source identification and risk assessment of heavy metals in a coal mining area in Henan, Central China
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DOI：
10.1016/j.ibiod.2017.03.026
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发表时间：
2018-03-01
影响因子：
4.8
通讯作者：
Tian, Wen
中科院分区：
文献类型：
--
作者：
Li, Kuangjia;Gu, Yansheng;Tian, Wen
本研究的目的是调查某煤矿矿区矸石中重金属浓度及土壤重金属污染情况。通过对脉石和表层土壤样品中镉（Cd）、铅（Pb）、铜（Cu）、锌（Zn）和铬（Cr）的浓度测定，研究了有毒金属的空间分布、污染源、潜在生态风险和潜在健康风险。表层土壤中Cd、Pb、Cu、Zn的含量超过中国国家标准（CNS, G815618-1995）。Cd、Pb、Cu和Zn的空间分布相似，从矸石堆向周边农田呈下降趋势。Pearson相关矩阵和主成分分析结果表明，Cd、Pb、Cu和Zn元素来源于矸石堆。潜在生态风险指数范围为97.2 ~ 619.5，与Cd、Pb、Cu、Zn的空间分布相似。研究结果表明，土壤有机质超过了相应的CNS，存在明显的生态风险，应采取监测和修复措施，以保护居民健康和作物安全。(C) 2017 Elsevier Ltd.版权所有。
The purpose of this study is to investigate the heavy metal (HM) concentration of the gangue and HM pollution of the soil in a coal mining area. On the basis of determination of the concentrations of cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn) and chromium (Cr) in the samples from the gangue and surface soils, the spatial distribution of toxic metals, contamination sources, potential ecological risks, potential health risks were studied. The content of Cd, Pb, Cu and Zn in the surface soils exceeded China National Standard (CNS, G815618-1995). The spatial distributions of Cd, Pb, Cu and Zn are similar, exhibiting a declining trend from the gangue dump to the surrounding farmland. Results of Pearson correlation matrix and principal component analysis indicate that the origin of Cd, Pb, Cu and Zn elements is the gangue dump. The potential ecological risk index ranges from 97.2 to 619.5, and its spatial distribution is similar to those of Cd, Pb, Cu and Zn. Our results indicate that the HMs exceeded the corresponding CNS and posed noticeable ecological risks, which suggest that monitor and remediation measures should be taken in order to protect the health of the residents and the safety of the crops. (C) 2017 Elsevier Ltd. All rights reserved.