Self-potential and spectral induced polarization signals associated with microbial sulphate reduction

K.P. Singh, Rory Doherty, Trevor Elliot, D. Ntarlagiannis

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Self-potential and spectral induced polarization responses associated with microbial processes involved in sulphate reduction have been monitored in a Perspex Winogradsky column filled with glass beads and growth medium. Salt-bridge is utilized as an electrolytic contact between experiment and control column. Equally spaced SP electrodes are used in combination of Ag-AgCl electrodes to compare electrodic and SP signals associated with the microbial processes involved in sulphate reduction. This study reveals that magnitude of SP varies from 5 to -2 mV and Electrodic potential 0 to -20 mV at the time of domination (day 39) of sulphate reducing bacteria which are very small in comparison to those measured by fixing both measuring and reference Ag-AgCl electrodes in experiment column. We observed that real and imaginary parts of complex conductivities increase with increase in production of H2S and CO in the experiment column. Both real and imaginary parts of surface complex conductivity vary at low frequencies similar to typical growth curve of bacterial population. Sodium lactate as a carbon source, dissolved in Lagan River water was flushed into the column for biostimulation on 144th day. The dissolved oxygen in flushed fluid might have killed the anaerobes in the column and decrease in complex conductivities similar to death phase of bacteria is observed for one week. The results obtained from this experiment should contribute to further understanding the biogeophysical responses involved in complex environments.


    Read More: http://library.seg.org/doi/abs/10.1190/segj092009-001.57
    Original languageEnglish
    Title of host publicationProceedings of the 9th SEGJ International Symposium
    Subtitle of host publicationSEG Global Meeting Abstracts
    PublisherSociety of Exploration Geophysicists of Japan
    Pages1-4
    Number of pages4
    ISBN (Electronic)10.1190/segj092009-001.57
    ISBN (Print)978-4-938493-06-6
    Publication statusPublished - Oct 2009
    EventProceedings of SEGJ - , Japan
    Duration: 01 Oct 200901 Oct 2009

    Conference

    ConferenceProceedings of SEGJ
    CountryJapan
    Period01/10/200901/10/2009

    Bibliographical note

    Medium of Output: poster

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