Iron Removal Halide Leaching

To keep enough iron in solution the chemical oxidation of metal sulfides must occur in an acid environment below pH 5.0. The ferrous iron arising in this reaction can be reoxidized to ferric iron by T. ferrooxidans or L. ferrooxidans and as such can take part in the oxidation process again. In indirect leaching the bacteria do not need to be in contact with the mineral surface.

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