Abstract
This study demonstrated for the first time the possibility to remove and partially recover the Ruthenium contained in industrial effluents by using purple non sulfur bacteria (PNSB) as microbial biosorbents. Up to date, the biosorption was only claimed as possible tool for the removal of the platinum-group metals (PGM) but the biosorption of Ru was never experimentally investigated. The PNSBs tested have adsorbed around 40 mg g (dry biomass)−1 of the Ru contained in the real industrial effluents. At the end of the bioremoval experiments, the amount of Ru recovered from the biomass ranged from 42 % to 72 % of that adsorbed by PNSB, depending by the characteristics of the Ru effluent used. In any case, the use of microbial sorbents such as PNSB for the biosorption and recovery of Ru can be considered a way to reduce both the costs and the impact on the environment of the mining activities needed to obtain the increasing amounts of this rare and precious metal requested by the industrial activities related to its use.
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Colica, G., Caparrotta, S. & De Philippis, R. Selective biosorption and recovery of Ruthenium from industrial effluents with Rhodopseudomonas palustris strains. Appl Microbiol Biotechnol 95, 381–387 (2012). https://doi.org/10.1007/s00253-012-4053-9
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DOI: https://doi.org/10.1007/s00253-012-4053-9