Formation of Ni- and Zn-Sulfides in cultures of sulfate-reducing bacteria

Jonathan P. Gramp, Jerry M. Bigham, Keiko Sasaki, Olli H. Tuovinen

研究成果: ジャーナルへの寄稿記事

19 引用 (Scopus)

抄録

The purpose of this study was to characterize Ni- and Zn-sulfides precipitated in sulfate-reducing bacterial cultures. Fe-free media containing 58 mM SO42- were amended with Ni and Zn chloride followed by inoculation. Precipitates were sampled from cultures after two weeks of incubation at 22, 45, and 60°C. Abiotic controls were prepared by reacting bacteria-free liquid media with Na2S solutions under otherwise identical conditions. Precipitates were collected anaerobically, freeze-dried and analyzed by x-ray diffraction (XRD), scanning electron microscopy, and for total Ni, Zn, and S. In Ni-containing media, biogenic sulfide precipitates were mostly heazelwoodite (Ni3S2), whereas abiotic precipitates were mixed heazelwoodite and vaesite (NiS2). The biogenic Ni-precipitates were better crystalline than the corresponding abiotic samples. Sphalerite (ZnS) was identified by XRD in precipitates sampled from Zn-containing media. Scanning electron microscopy revealed disordered morphological features for the sulfides, which occurred mostly as aggregates of fine particles in biogenic samples, whereas abiotic precipitates contained more plate- and needle-like structures.

元の言語英語
ページ(範囲)609-614
ページ数6
ジャーナルGeomicrobiology Journal
24
発行部数7-8
DOI
出版物ステータス出版済み - 10 1 2007

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sulfate-reducing bacterium
Sulfides
Sulfates
Precipitates
Bacteria
sulfide
Electron Scanning Microscopy
diffraction
scanning electron microscopy
X-Rays
sphalerite
Transmission Electron Microscopy
inoculation
Needles
Chlorides
incubation
chloride
sulfate
Diffraction
bacterium

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Environmental Chemistry
  • Environmental Science(all)
  • Earth and Planetary Sciences (miscellaneous)

これを引用

Formation of Ni- and Zn-Sulfides in cultures of sulfate-reducing bacteria. / Gramp, Jonathan P.; Bigham, Jerry M.; Sasaki, Keiko; Tuovinen, Olli H.

:: Geomicrobiology Journal, 巻 24, 番号 7-8, 01.10.2007, p. 609-614.

研究成果: ジャーナルへの寄稿記事

Gramp, Jonathan P. ; Bigham, Jerry M. ; Sasaki, Keiko ; Tuovinen, Olli H. / Formation of Ni- and Zn-Sulfides in cultures of sulfate-reducing bacteria. :: Geomicrobiology Journal. 2007 ; 巻 24, 番号 7-8. pp. 609-614.
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