表层构造措施对铜矿尾矿重金属纵向迁移的影响

    Effect of surface reconstruction on vertical migration of heavy metals in the copper tailing pond

    • 摘要: 柱状实验研究淋滤条件下表层构造措施对重金属纵向迁移的影响。分析测定柱体各层样品的pH值和Cu、Zn、Cd等污染重金属的全量及其可交换态。结果表明:覆土层及石灰石层可明显提高尾矿pH值。覆土层全量Cd含量较原覆土明显上升,覆土层Zn、Cu含量除表层外明显降低。尾矿层各重金属柱1、柱2及柱3几乎均小于原样含量;可交换态覆土层Cu、Zn柱2柱3基本小于原覆土值,Cd柱2柱3除15cm处外均大于原覆土值。Cu、Zn、Cd尾矿层减少显著。覆土措施对Zn影响显著,对Cu,Cd重金属全量及可交换态也起到一定作用,但依然受到重金属的污染,石灰石层作用不明显。研究结论可为尾矿库污染调控与复垦利用措施提供依据。

       

      Abstract: The columnar experimental research leaching condition of heavy metal surface construction measures the influence of longitudinal migration.Determination of each layer of the cylinder sample pH and Cu,Zn,Cd of heavy metals pollution such as the quantity,and can exchange state.The results show that:the soil layer and limestone can obviously increase tailings pH value.The soil of the original Cd content is increased obviously than the soil,the content Zn,Cu in soil in addition to the surface layer reduced significantly.The heavy metal tailing layer 1,column 2 and column 3 almost were less than the same content;The Can exchange state of Cu,Zn in covering soil column 2 and column 3 almost less than the original value of the soil,Cd in column 2 and column 3 in addition to 15 cm place are larger than the original values of the soil.Cu,Zn,Cd in tailings layer reduced significantly.the covering soil measures significant effects of Zn,the total content and can exchange state of Cu,Cd also play a role,but still heavy metal pollution in soil,limestone layer does not play a significant role.Research results can provide the basis to pollution control and tailings reclamation measures.

       

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