Spatial distribution, contamination and potential ecological risk evaluationof heavy metals in farmlands around Maoping leadzinc mining area
WANG Weihua1, LEI Longhai1,2
1.Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2.Office of Soil and Water Conservation of Bijie City, Bijie, Guizhou 551700, China
Abstract:Soil samples in the farmlands around Maoping leadzinc mining area are collected to determine the concentrations of Cr, As, Ni, Pb, Zn, Cu and Co. It is found that the concentrations of Zn, Co and As are as high as 1.92, 1.47 and 1.12 times the initial values, respectively. The substrate effect is ranked in the order of NiCo>As>Ni>Cu>Cr>Pb. The potential ecological risk index of seven metals are in the order of Co>As>Ni>Cu>Pb>Cr>Zn, and at the moderate risk level as well. The ecological risk index (RI) distribution diagram illustrates that the severely polluted zone is located in the south of the southeast region in the studied mining area, and the pollution diffuses outwards, fortunately, the entire studied area are at the moderate risk level.
王卫华, 雷龙海,. 毛坪铅锌矿区农耕地土壤重金属空间分布、污染与生态评估[J]. 排灌机械工程学报, 2016, 34(11): 979-989.
WANG Weihua, LEI Longhai,. Spatial distribution, contamination and potential ecological risk evaluationof heavy metals in farmlands around Maoping leadzinc mining area. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(11): 979-989.
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