Spatial distribution and transport characteristics of heavy metals around an antimony mine area in central China
Spatial distribution and transport characteristics of heavy metals around an antimony mine area in central China
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中部锑矿区周边重金属空间分布及迁移特征
DOI：
10.1016/j.chemosphere.2016.12.011
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发表时间：
2017-03-01
期刊：
影响因子：
8.8
通讯作者：
Lan, Shiming
中科院分区：
文献类型：
--
作者：
Li, Xin;Yang, Hong;Lan, Shiming
采用野外调查和地统计学分析方法，系统研究了锡矿山锑矿区重金属的空间分布和迁移特征。在研究区域，从裸地、草地、林地和河流沉积物中采集了52个土壤和沉积物样品，覆盖20 km（2）的表面积。采用波长色散X射线荧光光谱法和电感耦合等离子体质谱法分别测定了土壤性质和重金属含量。相关性分析和主成分分析表明，Cu、Zn、Cd、As、Pb和Sb的污染来源于人为输入，而Cr、Mn和Ni的污染来源于自然界。利用克里格插值法生成重金属分布图，以确定其分布趋势。结果表明，风、河流、距离、植被等对空间分布有影响。结果还表明，风传播的污染物的传播可能起着重要的作用。此外，利用地积累指数对全区重金属污染的环境风险进行了评价。研究结果表明，土壤中重金属的分布与当地盛行风向一致。此外，冶炼厂和尾矿中的重金属污染物对环境质量构成严重威胁。(C)2016爱思唯尔有限公司版权所有
The spatial distribution and transport characteristics of heavy metals in an antimony mine area (Xikuangshan, China) were systematically studied using a field survey and geostatistical analytical methods. In the study area, 52 soil and sediment samples were collected from bare land, grassland, woodland and river sediments covering a surface area of 20 km(2). The soil properties and heavy metal concentrations were measured by wavelength dispersive X-ray fluorescence spectrometry and inductively coupled plasma-mass spectrometry, respectively. Correlation analysis and principal component analysis suggest that Cu, Zn, Cd, As, Pb and Sb can be attributed to anthropogenic inputs, whereas Cr, Mn and Ni are of natural origin. Distribution maps of heavy metals were generated using the Kriging interpolation method to identify their distribution trends. The results show the influence of wind, river, distance and vegetation on the spatial distribution. The results also revealed that windborne transport may play a significant role in the spreading of contaminants. In addition, the environmental risk of heavy metal pollution was evaluated using their geoaccumulation indexes in the whole region. All of the results indicate that the heavy metal distributions in the soils were consistent with the local prevailing wind direction. In addition, the environmental quality could be seriously threatened by heavy metal contaminants from the smelter and tailings. (C) 2016 Elsevier Ltd. All rights reserved.