基于Hazen概率曲线确定铜陵土壤As元素含量

Research of Background Content for As Element of Soil Based on Hazen Probability Curve in Tongling

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As背景含量与污染叠加含量的区分方法。得到As元素的背景含量为12.3μg/g,与该区已知的土壤As元素背景含量(12.44μg/g)一致。还得到了As元素污染叠加含量与背景含量的界线点20.3μg/g,与据此含量数值计算得出的地积累污染指数的含义相符合。基于Hazen概率曲线区分铜陵矿区土壤As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 the method of distinguishing background content and polluted content for As element of soil based on Hazen probability curve in Tongling diggings were discussed. The background content of As element of soil gained by this method was 12.3μg/g, in accord with the known background content（ 12.44 μg/g）. The limitary content of background content and polluted content of As element of soil in Tongling diggings were gained, that was 20.3 μg/g, in accord with the meaning of index of geoaccumulation calculated by using this content of As element. So the method for fos element was efficient in Tongling diggings. And the method should be researched furthermore by using for other heavy metal elements and in different areas.