| 摘要 |
This invention relates to a method of treating aqueous mine tailings and other aqueous mine residues such as mine water, especially acidic mine water (AMD) from underground workings as well as aqueous residues from reclaimed mining materials, the method including the step of treating the aqueous mine tailings or residue with a biocide/s to kill chemolithotropic bacteria such as Thiobacillic feroxidans and Desulfovibrio vulgaris. The biocide may be chlorine dioxide, sulphur dioxide, potassium permanganate, tributyl tin oxide (TBTO), cooling tower biocides, hypobromous acid, ozone, and/or ultra violet light. The preferred biocide is a halide, in particular bromine. In accordance with a preferred embodiment of the invention, biocide/s may be applied in a Step A) to the slurry prior to the gold recovery process; in a Step B) to the slurry after the gold recovery process; and optionally in a Step C) to the dump where the slurry has been disposed in water (preferably treated AMD) sprayed on the dump for dust suppression. |
