Spatial distribution and sources of heavy metals in natural pasture soil around copper-molybdenum mine in Northeast China
| Autor: | Kang Wang, Chen Hong, Feng Lihui, Li Yifei, Silu Ma, Yi Xing, Zhiqiang Wang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Pollution
China Health Toxicology and Mutagenesis media_common.quotation_subject 0211 other engineering and technologies 02 engineering and technology Geostatistics 010501 environmental sciences Spatial distribution 01 natural sciences Pasture Mining Soil Metals Heavy Grazing Humans Soil Pollutants 0105 earth and related environmental sciences media_common Molybdenum 021110 strategic defence & security studies geography Topsoil Spatial Analysis geography.geographical_feature_category Public Health Environmental and Occupational Health General Medicine Contamination Soil contamination Environmental chemistry Environmental science Copper Environmental Monitoring |
| Zdroj: | Ecotoxicology and environmental safety. 154 |
| ISSN: | 1090-2414 |
| Popis: | 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 assessed by geo-accumulation index. All the results revealed that the spatial distribution of heavy metals in soil were in agreement with the local human activities. Investigating and identifying the origin of heavy metals in pasture soil will lay the foundation for taking effective measures to preserve soil from the long-term accumulation of heavy metals. |
| Databáze: | OpenAIRE |
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