| 摘要 |
The invention concerns a method for treating an aqueous medium containing a metal in hydroxyl form or capable of being transformed into hydroxide by introducing a base in said medium, said treatment being designed to recuperate said metal in carbonate or hydrogenocarbonate form. The invention is characterised in that it comprises a step which consists in injecting carbon dioxide in sufficient amount to bring the pH of said medium to a predetermined value corresponding to the minimum solubility of carbonate or hydrogenocarbonate of said metal in said medium. Said method is particularly useful for recuperating lithium, calcium, strontium, barium, zinc, manganese, cadmium, copper and lead. Said method is particularly useful for treating an effluent or for recuperating metals in recycling or upgrading processes for alkaline cells and batteries.
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