The cycling of Ni,Zn, Cu in the system “mine tailings–ground water–plants”: A case study |
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| Authors: | Nikolay V Sidenko Elena I KhozhinaBarbara L Sherriff |
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| Institution: | Department of Geological Sciences, University of Manitoba, Winnipeg, Man., Canada R3T 2N2 |
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| Abstract: | The comparative behaviour of Ni, Cu and Zn in the system “mine tailings–ground water–plants” has been investigated at the Ni–Cu mine site operated by INCO Ltd. Thompson Operations, Thompson, Manitoba. Oxidation of sulphide minerals causes the release of metals from exposed tailings containing Ni ∼2000 ppm, Cu ∼150 ppm and Zn ∼100 ppm to the ground water, which contains 350 mg/L Ni, 0.007 mg/L Cu, and 1.6 mg/L Zn. The metal concentration in the ground water is affected by the relative proportions of sulfide minerals, the rate of oxidation of sulphide minerals (Ni-bearing pyrrhotite > sphalerite > chalcopyrite), and the affinity of the metals for secondary Fe-phases (Ni > Zn > Cu). |
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