Study on Spatial Distribution of Concentrations of Soil Heavy Metals in Dexing Area, Jiangxi Province

To study the spatial distribution characteristics of 10 heavy metals(As, Hg, Mo, Cd, Cr, Zn, Cu, Mn, Pb, Ti) in the soil of Dexing area, Semi-variance function is used to quantitatively describe the structural features of the spatial distribution and map the content distribution. The analysis shows, in addition to cadmium and lead, other elements fit relatively well, which reflects a good spatial structure of the heavy metals content of soil in Dexing. The relatively poor fitting effect of cadmium and lead indicates poor spatial structure and complex control factors. Various factors interaction result in the element content distribution going to complexity. Most elements show some directional features, which are consistent with the same feature in the distribution maps. The distribution maps show that high contents of heavy metal are focus on the Dexing mining area and some small mining areas. The mine exploration is the main reason for the rise of the content of heavy metals and even pollution in Dexing area.