Acid Mine Drainage Treatment Using Bayer Precipitates Obtained from Seawater Neutralization of Bayer Liquor.

Thus, the presence of calcium carbonate upon the addition of seawater (source of Ca) to Bayer liquor can be explained in terms of Equation (3) (3) Ca aq 2 + + CO 3 aq 2 − → CaCO 3 s An interesting trend existed for calcite and aragonite in the XRD patterns (Table 1 ), whereby calcite peaks were prevalent in the precipitates obtained from higher Bayer liquor concentrations (6–10 g L −1 ), while both aragonite and calcite related peaks were present in precipitates obtained at lower concentrations.

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