The evaluation of the present situation of the heavy metal pollution in the top soil of Qinghangdao-Tangshan area, Hebei Province

Abstract：The Tangshan-Qinghuangdao area is an important agro-economic tract in Hebei Province, and the safety evaluation of its soil quality has a considerable realistic significance. According to the regional topsoil geochemical data, the authors employed the single factor index method and the Nemerow synthetic index method to make soil quality assessment. The results indicate that the pollution of heavy metal elements is caused mainly by Ni, Cr, Cu and Cd. The polluted areas of heavy metal elements Ni, Cr and Cu are mainly concentrated in the border area and the northern part of Lulong, Funing and Changli counties, whereas the polluted areas of Cd heavy metal element are mainly concentrated in the western and northwest parts of Tanghai County. The environmental geochemical quality of most soils in Tangshan-Qinghuangdao area is proved to be pretty well, with no obvious pollution.