冀东平原土壤重金属元素的存在形态及有效性分析

通过对冀东平原根系土中8种重金属元素形态含量的统计与分析,总结出其形态组成特征,初步分析了各重金属元素在土壤中的地球化学行为。笔者运用相关性分析方法,对重金属元素有效态含量与全量及土壤pH、TOC的相关性进行分析,从而得出重金属元素有效态含量的高低不仅受其全量的影响,而且与土壤pH、TOC亦有密切关系,这为表层土壤重金属元素污染程度的科学合理评价提供了理论依据。

An analysis of the modes of occurrence and validities of the heavy metal elements in soil of eastern Hebei plain

Based on statistics and analysis of morphological content of eight heavy metal elements, the authors tentatively summed up the composition of their morphological characteristics and analyzed geochemical behaviors of these heavy metal elements in soil. The correlation between the effective content and the total content of heavy metal elements and pH, TOC of the soil are conducted by using the method of correlation analysis. It is concluded that the effective content of heavy metals is controlled not only by the level of the total content but also by pH, TOC of the soil. The results obtained provide a theoretical basis for the scientific and rational assessment of the topsoil.