Spatial distribution and sources of heavy metals in natural pasture soil around copper-molybdenum mine in Northeast China

Ecotoxicology and Environmental Safety
Zhiqiang WangSilu Ma

Abstract

The characterization of the content and source of heavy metals are essential to assess the potential threat of metals to human health. The present study collected 140 topsoil samples around a Cu-Mo mine (Wunugetushan, China) and investigated the concentrations and spatial distribution pattern of Cr, Ni, Zn, Cu, Mo and Cd in soil using multivariate and geostatistical analytical methods. Results indicated that the average concentrations of six heavy metals, especially Cu and Mo, were obviously higher than the local background values. Correlation analysis and principal component analysis divided these metals into three groups, including Cr and Ni, Cu and Mo, Zn and Cd. Meanwhile, the spatial distribution maps of heavy metals indicated that Cr and Ni in soil were no notable anthropogenic inputs and mainly controlled by natural factors because their spatial maps exhibited non-point source contamination. The concentrations of Cu and Mo gradually decreased with distance away from the mine area, suggesting that human mining activities may be crucial in the spreading of contaminants. Soil contamination of Zn were associated with livestock manure produced from grazing. In addition, the environmental risk of heavy metal pollution was asse...Continue Reading

Citations

Aug 16, 2019·Environmental Science and Pollution Research International·Huimin ZhuoLijun Ren
Mar 23, 2020·Environmental Science and Pollution Research International·Min TanJunfeng Qu
Jun 21, 2020·International Journal of Environmental Research and Public Health·Jingchao LiuXia Li
Jan 10, 2021·Ecotoxicology and Environmental Safety·Aimin JiangZhengkai Wei

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