| 摘要 |
The invention relates to a technology for heavy metal separation from sewage, utilizing the galvanic production waste. Summary of the invention consists in that it is proposed a process for heavy metal separation from sewage by adding an alkaline solution and precipitation thereof in the form of hydroxides at pH 4,6...5,4, removal of the formed sediment, where prior to the addition of the alkaline solution into the sewage there is introduced metal iron in a quantity of 5...10 times greater than the necessary stoichiometric quantity for Cu substitution in the sewage, ensuring in a single process the complete separation of Cu ions, as well as of Fe(III) and Al(III) ions, separation of the latter ones being conditioned by the preliminary oxidation of Fe(II) in Fe (III).Claims: 1 |
