Platinum recovery from industrial process streams by halophilic bacteria: Influence of salt species and platinum speciation.

摘要: Abstract The increased use and criticality of platinum asks for the development effective low-cost strategies metal recovery from process waste streams. Although biotechnological processes can be applied valorization diluted aqueous industrial streams, investigations considering real stream conditions ( e.g. , high salt levels, acidic pH, speciation) are lacking. This study investigated by a halophilic microbial community in presence concentrations (10–80 g L −1 ), different matrices (phosphate salts, sea salts NH 4 Cl) refinery stream. halophiles were able to recover 79–99% Pt at 10–80 g L pH 2.3. Transmission electron microscopy suggested positive correlation between intracellular cluster size elevated concentrations. Furthermore, recovered 46–95% Pt-amine complex Pt[NH 3 ] 2+ after addition an alternative source (K 2 PtCl 0.1–1.0 g L Pt). Repeated Pt-tetraamine (from stream) was obtained concomitant fresh biomass harvesting saturated biomass. demonstrates how streams transformed into rich biomass, which would interesting feed precious metals refinery.