| 摘要 |
The invention relates to a process for valorizing a liquid acid effluent containing heavy metals, characterized in that it comprises: (i) removing said heavy metals from said effluent, whereby an aqueous saline solution is obtained, which contains at least 2 % by weight of salts; (ii) concentrating the saline aqueous solution obtained in step (i) by evaporation or electrodialysis so as to obtain an aqueous saline solution containing at least 10 % by weight of salts; (iii) subjecting the aqueous saline solution obtained in step (ii) to an electrodialysis with bipolar membranes or to an electro-electrodialysis, whereby at least one base, at least one acid and a spent saline aqueous solution are recovered, separately; (iv) optionally, recycling the spent saline aqueous solution obtained in step (iii) to step (ii). |
