Formation of Sphalerite (ZnS) Deposits in Natural Biofilms of Sulfate-Reducing Bacteria-Reference-Cited by-同舟云学术

Formation of Sphalerite (ZnS) Deposits in Natural Biofilms of Sulfate-Reducing Bacteria

Published:2000-12 Issue:5497 Volume:290 Page:1744-1747
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Labrenz Matthias¹,Druschel Gregory K.¹,Thomsen-Ebert Tamara²,Gilbert Benjamin³,Welch Susan A.¹,Kemner Kenneth M.⁴,Logan Graham A.⁵,Summons Roger E.⁵,Stasio Gelsomina De³,Bond Philip L.¹,Lai Barry⁴,Kelly Shelly D.⁴,Banfield Jillian F.¹

Affiliation:

1. Department of Geology and Geophysics, University of Wisconsin–Madison, 1215 West Dayton Street, Madison, WI 53706, USA.

2. Diversions Scuba, Madison, WI 53705, USA.

3. Department of Physics, University of Wisconsin–Madison, 1150 University Avenue, Madison, WI 53706, USA.

4. Argonne National Laboratory, Argonne, IL 60439, USA.

5. Australian Geological Survey Organisation, GPO Box 378, Canberra ACT 2601, Australia.

Abstract

Abundant, micrometer-scale, spherical aggregates of 2- to 5-nanometer-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 10 6 times that of associated groundwater (0.09 to 1.1 parts per million zinc). Sphalerite also concentrates arsenic (0.01 weight %) and selenium (0.004 weight %). 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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