内梅罗指数和地质累积指数在土壤重金属评价中的差异探讨——以小秦岭金矿带为例

Discussion on the differences of heavy metals contamination in soil assessment with Nemerou index and geo-accumulation index——with Xiaoqinling gold belt as example

内梅罗指数和地质累积指数广泛应用于土壤、沉积物等环境介质中的重金属污染评价,选择金矿开发区土壤中Hg、Pb、Cu、Cd、Zn 5种重金属,对比了两种方法的评价结果,统计分析各个样品的综合污染程度,区分不同方法评价的差异,并提出了形成差异的主要原因。

Nemerou index and geo-accumulation index are widely used on the assessment of heavy metals contam- ination in soil and sediment. The authors selected Hg, Pb, Cu, Cd, Zn index from the soil of gold mining area, and contrasted the results of the two methods. The composite contamination extent of every samples was statistically ana- lyzed and the differences between the two＂ methods were pointed out. Finally, the primary causes of the differences were put forward.