Removal of lead from AMD: Process and device for removing lead from a liquid

The innovation describes a process for removing lead from a liquid such as contaminated water. The liquid is brought into contact with a PbrD protein which binds lead ions present in the liquid. The bound lead ions can then be recovered, for example as an insoluble salt or compound such as lead sulphide, lead iodide or lead acetate, or by means of an ion-exchange process. Thus, not only are lead levels in the liquid reduced, but the removed lead can be disposed of or recycled (e.g. to industries that utilize the metal) without posing a threat to animals or human health or the environment.
Benefits: High specificity for lead removal, even at low concentrations. Environmentally friendly compared to chemical precipitation methods (produces less toxic sludge). Portable and scalable—from household water purification to large-scale mine water treatment. Potential for metal recycling, turning a pollutant into a usable industrial resource.