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Sulfate‐reducing bacteria and immobilization of metals
The subaqueous disposal of sulfide‐rich mine tailings appears to minimize the release of solubilized metals from these deposits. As well as inhibiting oxidation of the tailings, and consequent release of trace metals, burial of tailings results in the immobilization of metals as insoluble sulfides. Dissolved sulfide is generated by sulfate‐reducing bacteria (SRB), a diverse group of microorganisms responsible for the bulk of organic carbon mineralization in sediments. They can metabolize a wide variety of organic compounds, although they require low‐molecular‐weight compounds, nearly all of which are fermentation products from the anaerobic bacterial degradation of more complex substrates. These bacteria are universally distributed and are found in greatest numbers in anoxic sediments, although they are able to withstand long exposure to oxygen. SRB are adaptable to almost any environment and can grow at temperatures of ‐5 to 75°C, pH's of 5 to 9.5, and at virtually any salinity and pressure.
Sulfate‐reducing bacteria and immobilization of metals
The subaqueous disposal of sulfide‐rich mine tailings appears to minimize the release of solubilized metals from these deposits. As well as inhibiting oxidation of the tailings, and consequent release of trace metals, burial of tailings results in the immobilization of metals as insoluble sulfides. Dissolved sulfide is generated by sulfate‐reducing bacteria (SRB), a diverse group of microorganisms responsible for the bulk of organic carbon mineralization in sediments. They can metabolize a wide variety of organic compounds, although they require low‐molecular‐weight compounds, nearly all of which are fermentation products from the anaerobic bacterial degradation of more complex substrates. These bacteria are universally distributed and are found in greatest numbers in anoxic sediments, although they are able to withstand long exposure to oxygen. SRB are adaptable to almost any environment and can grow at temperatures of ‐5 to 75°C, pH's of 5 to 9.5, and at virtually any salinity and pressure.
Sulfate‐reducing bacteria and immobilization of metals
Perry, K. A. (author)
Marine Georesources & Geotechnology ; 13 ; 33-39
1995-01-01
7 pages
Article (Journal)
Electronic Resource
Unknown
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