The influence of migration on the reconstruction area of soil contaminated by complex heavy metals

In the heavy metal compound pollution area, the isolation and repair technology was used to seal the fixed contaminants And then, the land organic reconstruction carried out. In order to test the isolation effectiveness of reconstructed land, two experiments have been carried out. There were the migration status of heavy metals in reconstruction soil profile and its effects on crops, respectivly. The contents of the heavy metal pollutants such as Hg, Cu, Cd, Zn, Pb, As, Cr and Ni were studied. The results showed that Hg, Cu, Cd, Zn and Pb were the main heavy metals that caused pollution in the study area. Besides, the concentration of Pb was very serious. After two years of planting, the content of heavy metals in each layer of the reconstructed and profile were lower than that of the soil environmental quality standard (GB 15618-1995). The migration and accumulation of heavy metals on the various soil profiles were not found. And the edible part of corn and peanuts planted which were planted in the reconfiguration soil profile conld conform the food safety requirements.