Current study includes the analysis of mine tailings and leachate water and prediction of species originated from the tailings. The variation of contaminants were measured upon the distance from the tailings to the nearby stream. The ions concentration was highest at the tailings and pit mouth and it becomes lower as it goes far away from the origin. This is the reason that the leachate was diluted with the uncontaminated stream water. The tailings were mainly classified into reddish one and yellow one. The main mineral of reddish tailings were quarts, illite, plumbojarosite and a small amount of sphalerite. The main mineral of yellow tailings were muscovite, quarts, plumbojarosite, and a small amount of chalcopyrite and sphalerite. Pb and Zn were found in the leachate in high concentration and become the major contaminants. These come from the dissolution of plumbojarosite and sphalerite contained in the mine tailings.

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This study is conducted to evaluate the leaching of contaminants from mine tailing by natural water and finally to estimate the leaching and transportation of heavy metal contaminants by rainfall. In order to identify contaminated heavy metal of soil, 17 soil, 2 tailing and 2 waste dump and 2 control samples were taken at mine area and analyzed total metal contents. The leaching experiments were conducted using distilled water. Cu, Pb, Zn was extracted from the reddish mine tailing in a short period time, especially the extraction rate of Cu (45.0%) was highest. The contaminants were leached from the yellowish mine tailing within an hour and the leaching rate of Cd (42.0%) and Zn (17.2%) were relatively high. The reddish soil from the waste dump showed leaching of Cu (5.1%), Pb (4.0%) and Zn (3.3%), however the leaching rate was low except Mi (14.2%). From the yellowish soil sampled from the dumping site, the leaching of Cu (8.2%) and Ni (9.7%) was high while the leaching of Zn (0.2%) were relatively low.