淮南新庄孜矿煤矸石充填复垦土壤中镉的迁移特征

镉（Cd）是严重危害人类健康的一种重金属元素，具有较强的生物毒性。为了保证矿区充填复垦土地种植农作物的生态安全，以淮南新庄孜矿煤矸石充填复垦治理区为对象，对其土壤和煤矸石中镉元素的含量进行了跟踪分析研究，结果表明，煤矸石充填复垦区土壤中垂直方向上各层镉元素含量均高于淮南市土壤背景值和中国土壤背景值，其中靠近填充物——煤矸石的土壤镉含量超标率最高，从土壤中镉元素的水平和垂直空间分布来看，复垦充填物——煤矸石因受淋溶作用造成的重金属元素的排放和迁移直接或间接污染了复垦土壤的生态环境，其中镉元素已经出现富集，甚至达到了污染水平。

Characteristics of Cadmium migration in the reclaimed soil filled with the coal gangue from the Xinzhuangzi mine in Huainan

Cadmium is a heavy metal element that can seriously harm human health with strong biological toxicity. The trace analysis on content of Cadmium (Cd) element in the soil and coal gangue was conducted to ensure the ecological security of the reclaimed land with mine filling, which was used to grow crops. The managed area of mine gangue filling reclamation in Huainan was the object. The results show that the Cadmium element content in each layer on the vertical dimension were higher than the soil background values of Huainan and that of China. The over standard rate of Cadmium is the highest near the padding-coal gangue. From the spatial distribution in the soil of Cadmium Elements on the horizontal and vertical distribution, the ecological environment of the mine reclamation area was seriously directly or indirectly polluted by the eluviation emissions and migration of heavy metals, from coal gangue filling, Cadmium is enriched and even reaches the pollution level.