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Title: Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations

Abstract

Stimulated sulfate-reduction is a bioremediation technique utilized for the sequestration of heavy metals in the subsurface.We performed laboratory column experiments to investigate the geoelectrical response of iron sulfide transformations by Desulfo vibriovulgaris. Two geoelectrical methods, (1) spectral induced polarization (SIP), and (2) electrodic potential measurements, were investigated. Aqueous geochemistry (sulfate, lactate, sulfide, and acetate), observations of precipitates (identified from electron microscopy as iron sulfide), and electrodic potentials on bisulfide ion (HS) sensitive silver-silver chloride (Ag-AgCl) electrodes (630 mV) were diagnostic of induced transitions between an aerobic iron sulfide forming conditions and aerobic conditions promoting iron sulfide dissolution. The SIP data showed 10m rad anomalies during iron sulfide mineralization accompanying microbial activity under an anaerobic transition. These anomalies disappeared during iron sulfide dissolution under the subsequent aerobic transition. SIP model parameters based on a Cole-Cole relaxation model of the polarization at the mineral-fluid interface were converted to (1) estimated biomineral surface area to pore volume (Sp), and (2) an equivalent polarizable sphere diameter (d) controlling the relaxation time. The temporal variation in these model parameters is consistent with filling and emptying of pores by iron sulfide biofilms, as the system transitions between anaerobic (pore filling) and aerobic (pore emptying) conditions. Themore » results suggest that combined SIP and electrodic potential measurements might be used to monitor spatiotemporal variability in microbial iron sulfide transformations in the field.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Earth Sciences Division
OSTI Identifier:
929708
Report Number(s):
LBNL-354E
Journal ID: ISSN 0148-0227; JGREA2; TRN: US200812%%636
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research; Journal Volume: 113; Related Information: Journal Publication Date: May 2008
Country of Publication:
United States
Language:
English
Subject:
54; 58; AEROBIC CONDITIONS; BIOREMEDIATION; CHLORIDES; DISSOLUTION; ELECTRODES; ELECTRON MICROSCOPY; GEOCHEMISTRY; HEAVY METALS; IRON; IRON SULFIDES; MINERALIZATION; MONITORING; MONITORS; POLARIZATION; RELAXATION; RELAXATION TIME; SURFACE AREA; TRANSFORMATIONS

Citation Formats

Hubbard, Susan, Personna, Y.R., Ntarlagiannis, D., Slater, L., Yee, N., O'Brien, M., and Hubbard, S.. Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations. United States: N. p., 2008. Web.
Hubbard, Susan, Personna, Y.R., Ntarlagiannis, D., Slater, L., Yee, N., O'Brien, M., & Hubbard, S.. Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations. United States.
Hubbard, Susan, Personna, Y.R., Ntarlagiannis, D., Slater, L., Yee, N., O'Brien, M., and Hubbard, S.. Fri . "Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations". United States. doi:. https://www.osti.gov/servlets/purl/929708.
@article{osti_929708,
title = {Spectral induced polarization and electrodic potential monitoring of microbially mediated iron sulfide transformations},
author = {Hubbard, Susan and Personna, Y.R. and Ntarlagiannis, D. and Slater, L. and Yee, N. and O'Brien, M. and Hubbard, S.},
abstractNote = {Stimulated sulfate-reduction is a bioremediation technique utilized for the sequestration of heavy metals in the subsurface.We performed laboratory column experiments to investigate the geoelectrical response of iron sulfide transformations by Desulfo vibriovulgaris. Two geoelectrical methods, (1) spectral induced polarization (SIP), and (2) electrodic potential measurements, were investigated. Aqueous geochemistry (sulfate, lactate, sulfide, and acetate), observations of precipitates (identified from electron microscopy as iron sulfide), and electrodic potentials on bisulfide ion (HS) sensitive silver-silver chloride (Ag-AgCl) electrodes (630 mV) were diagnostic of induced transitions between an aerobic iron sulfide forming conditions and aerobic conditions promoting iron sulfide dissolution. The SIP data showed 10m rad anomalies during iron sulfide mineralization accompanying microbial activity under an anaerobic transition. These anomalies disappeared during iron sulfide dissolution under the subsequent aerobic transition. SIP model parameters based on a Cole-Cole relaxation model of the polarization at the mineral-fluid interface were converted to (1) estimated biomineral surface area to pore volume (Sp), and (2) an equivalent polarizable sphere diameter (d) controlling the relaxation time. The temporal variation in these model parameters is consistent with filling and emptying of pores by iron sulfide biofilms, as the system transitions between anaerobic (pore filling) and aerobic (pore emptying) conditions. The results suggest that combined SIP and electrodic potential measurements might be used to monitor spatiotemporal variability in microbial iron sulfide transformations in the field.},
doi = {},
journal = {Journal of Geophysical Research},
number = ,
volume = 113,
place = {United States},
year = {Fri Feb 15 00:00:00 EST 2008},
month = {Fri Feb 15 00:00:00 EST 2008}
}