Application of electrical methods to measure microbial activity in soils: Preliminary microcosm results

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The application of the geophysical technique known as self-potential to the measurement of microbial activity was tested on laboratory microcosms containing ferric iron and iron-reducing bacteria Shewanella alga BrY. Measurements of the electrical response of silver-coated copper electrodes distributed along a Teflon probe inserted into sterile and inoculated layers containing either ferric chloride, ferric citrate, or ferric oxide rich soil were recorded over hours or days. Strong electrical signals reached values more negative than {minus}400 mV for all types of inoculated ferric iron layers. Electric signals in sterile control layers, by contrast, rarely reached values more negative than {minus}150 mV. ... continued below

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18 p.

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Cox, B.L. Sweet, A. & Majer, E. December 1, 1997.

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The application of the geophysical technique known as self-potential to the measurement of microbial activity was tested on laboratory microcosms containing ferric iron and iron-reducing bacteria Shewanella alga BrY. Measurements of the electrical response of silver-coated copper electrodes distributed along a Teflon probe inserted into sterile and inoculated layers containing either ferric chloride, ferric citrate, or ferric oxide rich soil were recorded over hours or days. Strong electrical signals reached values more negative than {minus}400 mV for all types of inoculated ferric iron layers. Electric signals in sterile control layers, by contrast, rarely reached values more negative than {minus}150 mV. These preliminary experiments indicate that it may be possible to apply the self-potential geophysical method to monitor bioremediation in the field.

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18 p.

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OSTI as DE98056094

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  • Other Information: PBD: Dec 1997

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  • Other: DE98056094
  • Report No.: LBNL--41047
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/656458 | External Link
  • Office of Scientific & Technical Information Report Number: 656458
  • Archival Resource Key: ark:/67531/metadc704208

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  • December 1, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 5, 2016, 1:10 p.m.

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Cox, B.L. Sweet, A. & Majer, E. Application of electrical methods to measure microbial activity in soils: Preliminary microcosm results, report, December 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc704208/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.