| 摘要 |
<p>A process for separating and recovering dissolved, precipitatable metals, in particular heavy metals, from aqueous solutions, in particular wastewaters, is proposed, in which the solutions are altered in their pH and/or in their redox potential in order to form precipitation products of these metals, the precipitation products are concentrated and are separated off as an aqueous suspension, and the suspension is fed to a known selective liquid/liquid extraction with ion exchangers and/or chelating agents, and the laden ion exchangers and/or chelating agents are then stripped. Also proposed is an apparatus for carrying out this process, in the form of a mixer/separator unit whose mixer is a mixing pump and upstream of whose separator a coalescing stage is preferably arranged, with the special feature that a static delay zone, advantageously a container having surface-increasing baffles, in particular a horizontal pipe into which a plastic net wound in a spiral is introduced, is provided downstream of the mixing pump.</p> |
