Biosorption of cobalt and copper from hydrometallurgical solutions mediated by Pseudomona spp
نویسنده
چکیده
Metal accumulation in the environment as a result of mining and metallurgical activities is arising as a matter of serious concern. The removal and recovery of metals from hydrometallurgical solutions and waste water prior to their release to the environment are important in preserving the ecosystem as well as from an economical perspective. There are several technologies used to recover metals such as Cu, Co, Zn, Hg and many others. These include among others, ion exchange, precipitation, filtration, electrochemical treatment, electrowinning, reverse osmosis and reduction. These technologies, however, tend to be excessively expensive when the metal concentrations are less than 100 mg/l (Bueno et al., 2008). Since microorganisms have developed survival strategies in metal polluted habitats, their different microbial detoxifying mechanisms such as bioaccumulation, biotransformation, biomineralization or biosorption can be applied either in situ or ex situ. Bacteria also make excellent biosorbents because of their high surface to volume ratios and a high content of potentially active chermosorption sites such as teichoic acid in their cell walls (Beveridge, 1989). MULABA-BAFUBIANDI, A.F., DLAMINI, N.P., AND MAMBA, B.B. Biosorption of cobalt and copper from hydrometallurgical solutions mediated by Pseudomona spp. Hydrometallurgy Conference 2009, The Southern African Institute of Mining and Metallurgy, 2009.
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