Abstract:

According to the statistics and analysis on contents of 5 kinds of heavy metal elements such as As, Cd, Cr, Hg and Pb under different forms from 39 samples of root soil in Langfang area, this paper sums up the characteristics of form composition, and analyzes the geochemical behavior of the heavy metal elements in the root soil preliminarily. By using the correlation analysis method, the effective form contents and total contents of 5 kinds of heavy metal elements, pH and TOC of the soil are analyzed to come to a conclusion that the effective form contents of heavy metal elements are not only effected by the total contents, but also closely related to pH and TOC in soil, which provides theoretical basis for studying pollution degree of heavy metal elements of surface soil in Langfang area.

Key words: root soil, heavy metal, existence form, validity, Langfang