Abstract
This study investigated the Yangshanchong tailings reservoir to determine the migration of heavy metals in mine tailings. By paralleling to tailings discharge direction, we set 4 sampling profiles, open channel excavation sampling. The results showed that the transfer rates of Cu, As, Hg, Cd, and Pb are relatively fast, while that of Zn is slower. Hg, Cu, Cd, Pb and Zn secondary enrichment appear at 40~80cm. There are some discrepancies in the heavy metal migration characteristics in different places. At the highest part of the tailings reservoir, heavy metal element's content is higher than the other sampling points, heavy metals leaching quantity is small, while in the low-lying areas, Zn, Cu and Cd form a local enrichment in the surface, and also part of heavy metal elements secondary enrichment in less than 100 cm shallow tailings. Surface grass planting can cause some elements to enrich, which might hinder the rehabilitation in the tailings reservoir.
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