确定土壤背景值的Hazen概率法--以铜陵矿区Pb为例

Hazen probability curve method for determining background content of soil—A case study of Pb element in Tongling area

本文选取已知土壤背景含量的铜陵矿区,基于Hazen概率曲线,探讨了土壤污染重金属元素Pb背景含量与污染叠加含量的区分方法.得到Pb元素的背景含量为28.5μg/g,与该区深层土壤样中Pb元素含量的平均值(34μg/g)比较接近.还得到了Pb元素污染叠加含量与背景含量的界线点51μg/g.基于Hazen概率曲线区分铜陵矿区土壤Pb元素背景含量与污染叠加含量的方法是有效的,有必要将该方法推广到土壤中其它重金属污染元素、其它地区作进一步研究.

In this paper, we discuss the method to distinguish background content from polluted content for Pb element in soil based on Hazen probability curve in Tongling area. The background content of Pb element in soil gained by this method is 28.5 μg/g, which is in accord with the average content of 34 μg/g in deep underground soil. The limitary content of 51 μg/g is obtained for background content and polluted content of Pb element in soil in Tongling area. So the method to distinguish Pb element is efficient in Tongling area, and it should be researched furthermore for studying other heavy metal elements in different areas.