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Pollution and Biotoxicity of Molybdenum-nickel Mine Tailing and Smelting Waste

Molybdenum nickel mine contains several heavy metals. During its exploring and smelting,the tailings and smelting waste have been produced. Under the leaching of rain,the leachate produced transforms to the environment and affects ecological environment. The pollution and biotoxicity of molybdenum-nickel mine tailings and smelting waste were investigated through physicochemical analysis, leaching test under simulated acid rain with different p H values, and biological toxicity test by photobacteria. Results showed that heavy metals concentrations in smelting waste were less than that in crude ore,but still higher for Ni,Mo and Zn which were respectively as 2.44%,0.18%,0.36%. p H values in simulated acid rain had no obvious significance in heavy metals in leachate. The toxicity to photobacteria was in the order as crude ore smelting waste self-ignition tailings no self-ignition tailings.