Authors / CoAuthors
Labrenz, M. | Druschel, G.K. | Thomsen-Ebert, T. | Gilbert, B. | Welch, S.A. | Kemner, K.M. | Logan, G.A. | Summons, R.E. | De Stasio, G. | Bond, P.L. | Lai, B. | Kelly, S.D. | Banfield, J.F.
Abstract
Abundant, micron-scale, spherical aggregates of 2?5 nm diameter sphalerite (ZnS) particles formed within natural biofilms dominated by relatively aerotolerant sulfate-reducing bacteria of the family Desulfobacteriaceae. The biofilm zinc concentration is about 106 times that of associated groundwater (0.09 ? 1.1 ppm Zn). Sphalerite also concentrates arsenic (0.01 wt %) and selenium (0.004 wt %). The almost monomineralic product results from buffering of sulfide concentrations at low values by sphalerite precipitation. These results show how microbes control metal concentrations in groundwater and wetland-based remediation systems and suggest biological routes for formation of some low temperature ZnS deposits.
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nonGeographicDataset
eCat Id
34996
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Keywords
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- External PublicationScientific Journal Paper
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- geochemistry
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- groundwater
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- metallogenesis
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- organic geochemistry
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2000-01-01T00:00:00
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