Colica Giovanni, Caparrotta Stefania, De Philippis Roberto
Department of Agricultural Biotechnology, University of Florence, Piazzale delle Cascine 24, Florence, Italy.
Appl Microbiol Biotechnol. 2012 Jul;95(2):381-7. doi: 10.1007/s00253-012-4053-9. Epub 2012 May 3.
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.
本研究首次证明了利用紫色非硫细菌（PNSB）作为微生物生物吸附剂去除并部分回收工业废水中钌的可能性。迄今为止，生物吸附仅被认为是去除铂族金属（PGM）的一种可能工具，但钌的生物吸附从未经过实验研究。所测试的紫色非硫细菌已吸附了实际工业废水中约40 mg g（干生物量）(-1)的钌。在生物去除实验结束时，从生物量中回收的钌量占紫色非硫细菌吸附量的42%至72%，这取决于所使用的钌废水的特性。无论如何，使用诸如紫色非硫细菌这样的微生物吸附剂进行钌的生物吸附和回收，可以被视为一种既能降低成本，又能减少为获取工业活动所需的越来越多的这种稀有贵金属而进行的采矿活动对环境影响的方法。
