Assessment of the heavy metal pollution in the typical agricultural soil around the tail slag

Yaoqing village，Laifugou and Maogou were selected as the representative study area in the Qinling mountains area.Thirty field samples were collected from the tailings and the typical agricultural soil in the study area，and the contents of Cr，Ni，Cu，Cd，Zn，As，Pb were measured.The soil samples were used to the determination of heavy metals pollution accumulation index and potential ecological risk index evaluation method.The results showed that As was not a typical metal mining pollution，and the typical pollutants and heavy metals for Yaoqing village，Laifugou were Cu，Zn，Cd，Pb.According to the index of geoaccumulation，the pollution level of the Yaoqing village and Laifugou were extremely serious，meanwhile Cr and Ni were non pollution.The pollution degree was evaluated by the potential ecological risk index method，the Maogou study area was slight ecological harm，while the ecological risk degree of the Yaoqing village and the Laifugou was very strong，Pb and Cd were the greater element in all of the heavy metals.