Study on Distribution of Heavy Metals in Soil and Concentrated Pollution in Coal Mine Reclamation Area
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摘要:
煤矿复垦区土壤重金属特征对于土地复垦方式选择具有重要意义。以山西煤矿复垦区土壤为研究对象。采用连续提取法对煤矿深部和浅部不同复垦方式土壤重金属特征进行了研究。研究结果表明：深部复垦区重金属含量明显高于未复垦区，Zn的含量是未复垦区的6.23倍，是国家标准值的9倍以上；深部复垦区土壤已受到Zn和Cr的污染；浅部复垦区重金属含量高于未复垦区，但低于国家标准值；该煤矿复垦区中Pb对于周边土壤具有较高的污染影响；Zn虽然其土壤中的含量较大，但对环境影响较小，重金属Ni和Cr在一定条件下对周围土壤存在危险；深部和浅部复垦区土壤中重金属Pb的RSP值最大，对环境影响最大，其他三种重金属无污染。
Abstract:Characteristics of heavy metal in coal mine reclamation area is of great significance to the selection of land reclamation methods. Take the soil of Shanxi coal mine reclamation area as the research object. The characteristics of heavy metals in deep and shallow mining were studied. The results showed that the heavy metal content in deep reclamation area was significantly higher than in unreclaimed area, The Zn content is 6.23 times that of the unreclaimed areas, and more than 9 times the national standard value; Soil in the deep reclamation areas has been contaminated by Zn and Cr; Heavy metal content in shallow reclamation area is higher than in unreclaimed area, But lower than the national standard value; Pb in the coal mine reclamation area has a high pollution impact on the surrounding soil; Although Zn is large in its soil, However, with little impact on the environment, Heavy metals Ni and Cr are dangerous to the surrounding soils under certain conditions; Maximum RSP of heavy metal Pb in deep and shallow reclamation areas, Maximum environmental impact, The other three heavy metals have no pollution.
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Key words:
- Mining engineering /
- Mine water inflow /
- Equal-dimensional innovation /
- Markov
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表 1 深部和浅部复垦区以及未复垦区土壤中重金属含量特征
Table 1. Characteristics of heavy metal content in deep and shallow reclamation areas and unreclaimed areas
重金属特征 Pb含量 Zn含量 Ni含量 Cr含量 深部复垦区 平均值 32.45 mg/kg 2250.48 mg/kg 43.96 mg/kg 74.13 mg/kg 变异系数 18.04% 77.99% 27.18% 41.32% 未复垦含量 30.29 mg/kg 361.23 mg/kg 39.58 mg/kg 47.15 mg/kg 浅部复垦区 平均值 25.13 mg/kg 56.95 mg/kg 40.85 mg/kg 73.92 mg/kg 变异系数 12.15% 20.22% 16.49% 25.15% 未复垦含量 14.15 mg/kg 18.69 mg/kg 28.59 mg/kg 39.62 mg/kg GB15618—2009 600 mg/kg 250 mg/kg 80 mg/kg 200 mg/kg 
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