Pore‐scale spectral induced polarization signatures associated with FeS biomineral transformations

Slater, Lee; Ntarlagiannis, Dimitrios; Personna, Yves Robert; Hubbard, Susan S.

doi:10.1029/2007gl031840

Cited by 66 publications

(77 citation statements)

References 13 publications

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“…They found secondary minerals such as sulfide precipitates produced phase anomalies of up to 60 mrad associated with both abiotic and microbial precipitation of iron and zinc sulfides (Ntarlagiannis et al, , 2010a(Ntarlagiannis et al, , 2010bWilliams et al, 2005;Slater et al, 2007;Personna et al, 2008). Laboratory experiments on sediments from the biostimulation field site at Rifle, CO, agreed with field results suggesting that redox active ions may play an important role in the observed SIP signals (Williams et al, 2009) but highlighted that more controlled experiments were needed (Ntarlagiannis et al, 2010b).…”

Section: '% ( )And% ('supporting

confidence: 70%

Laboratory study of spectral induced polarization responses of magnetite — Fe2+ redox reactions in porous media

et al. 2014

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Spectral induced polarization (SIP) phase anomalies in field surveys at contaminated sites have previously been shown to correlate with the occurrence of chemically reducing conditions and/or semiconductive minerals, but the reasons for this are not fully understood. We report a systematic laboratory investigation of the role of the semiconductive mineral magnetite and its interaction with redox-active versus redox-inactive ions in producing such phase anomalies. The SIP responses of quartz sand with 5% magnetite in solutions containing redox-inactive [Formula: see text] and [Formula: see text] versus redox-active [Formula: see text] were measured across the pH ranges corresponding to adsorption of these metals to magnetite. With redox inactive ions [Formula: see text] and [Formula: see text], SIP phase response showed no changes across the pH range 4–10, corresponding to their adsorption, showing [Formula: see text] anomalies peaking at [Formula: see text]–74 Hz. These large phase anomalies are probably caused by polarization of the magnetite-solution interfaces. With the redox-active ion [Formula: see text], frequency of peak phase response decreased progressively from [Formula: see text] to [Formula: see text] as effluent pH increased from four to seven, corresponding to progressive adsorption of [Formula: see text] to the magnetite surface. The latter frequency (3 Hz) corresponds approximately with those of phase anomalies detected in field surveys reported elsewhere. We conclude that pH sensitivity arises from redox reactions between [Formula: see text] and magnetite surfaces, with transfer of electrical charge through the bulk mineral, as reported in other laboratory investigations. Our results confirm that SIP measurements are sensitive to redox reactions involving charge transfers between adsorbed ions and semiconductive minerals. Phase anomalies seen in field surveys of groundwater contamination and biostimulation may therefore be indicative of iron-reducing conditions, when semiconductive iron minerals such as magnetite are present.

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Section: '% ( )And% ('supporting

confidence: 70%

Laboratory study of spectral induced polarization responses of magnetite — Fe2+ redox reactions in porous media

et al. 2014

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“…An expanding volume of literature demonstrates that electrical signals result from the geochemical and physical alteration of porous media associated with microbe-mineral transformations of electrically conductive mineral phases. The geoelectrical signatures arising during biomineralization of metallic iron sulfide (FeS) by sulfate-reducing microorganisms have received almost exclusive attention [Slater et al, 2007;Williams et al, 2005]. The electrical properties of FeS minerals clearly support geoelectrical monitoring of FeS biomineralization, e.g.…”

Section: Introductionmentioning

confidence: 99%

Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity

Slater¹,

Day‐Lewis²,

Ntarlagiannis³

et al. 2009

Geophysical Research Letters

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[1] We recorded bulk electrical conductivity (s b ) along a soil column during microbially-mediated selenite oxyanion reduction. Effluent fluid electrical conductivity and early time s b were modeled according to classic advectivedispersive transport of the nutrient medium. However, s b along the column exhibited strongly bimodal breakthrough which cannot be explained by changes in the electrical conductivity of the pore fluid. We model the anomalous breakthrough by adding a conduction path in parallel with the fluid phase, with a time dependence described by a microbial population-dynamics model. We incorporate a delay time to show that breakthrough curves along the column satisfy the same growth model parameters and offer a possible explanation based on biomass-limited growth that is delayed with distance from influent of the nutrient medium. Although the mechanism causing conductivity enhancement in the presence of biomass is uncertain, our results strongly suggest that biogeochemical breakthrough curves have been captured in geoelectrical datasets.

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“…Traditionally, geophysical methods have been employed to image physical properties of the subsurface, and only recently have geophysical responses been linked indirectly to microbial activity ͑Atekwana et Atekwana and Slater, 2009͒. The need to more precisely correlate the effects of mineral surfaces, microbes, and the products of microbial activity with common geophysical measurements has led to an increasing number of laboratory studies ͑Ntarlagiannis et al, 2005a; Williams et al, 2005;Davis et al, 2006;Slater et al, 2007;Personna et al, 2008;Abdel Aal et al, 2009͒ and initial field studies designed to validate upscaling of the approach ͑Williams et al, 2009͒. One of the most successful methods is the SIP technique.…”

Section: Introductionmentioning

confidence: 99%

“…The SIP ͑or complex-conductivity͒ method appears to be sensitive to ͑1͒ the presence of microbial cells ͑Ntarlagiannis et al, 2005b͒, ͑2͒ biofilm formation ͑Davis et al, 2006͒, and ͑3͒ microbialinduced sulfide mineral precipitation ͑Ntarlagiannis et al, 2005a; Williams et al, 2005;Slater et al, 2007;Personna et al, 2008͒. In the absence of metallic minerals, the SIP phase responses attributed to microbial cells and biofilm formation are small ͑1.5-mrad phaseshift maximum͒, and they require meticulous instrument calibration and careful measurement protocol ͑Ntarlagiannis et al, 2005b; Davis et al, 2006͒. In contrast, the precipitation of metallic minerals, including metal sulfides, generates significantly larger SIP responses, at least an order of magnitude higher ͑15-mrad phase shift͒, yielding anomalies that are easier to detect and monitor ͑Ntarlagiannis et al, 2005a;Williams et al, 2005;Slater et al, 2007;Personna et al, 2008͒.…”

Section: Introductionmentioning

confidence: 99%

Spectral induced polarization signatures of abiotic FeS precipitation

2010

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In recent years, geophysical methods have been shown to be sensitive to microbial-induced mineralization processes. The spectral-induced-polarization ͑SIP͒ method appears to be very promising for monitoring mineralization and microbial processes. With this work, we study the links of mineralization and SIP signals, in the absence of microbial activity. We recorded the SIP response during abiotic FeS precipitation. We show that the SIP signals are diagnostic of FeS mineralization and can be differentiated from SIP signals from biomineralization processes. More specifically, the imaginary conductivity shows almost linear dependence on the amount of FeS precipitating out of solution, above the threshold value 0.006 gr under experimental conditions. This research has direct implications for the use of the SIP method as a monitoring and decision-making tool for sustainable remediation of metals in contaminated soils and groundwater.

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Pore‐scale spectral induced polarization signatures associated with FeS biomineral transformations

Cited by 66 publications

References 13 publications

Laboratory study of spectral induced polarization responses of magnetite — Fe2+ redox reactions in porous media

Laboratory study of spectral induced polarization responses of magnetite — Fe2+ redox reactions in porous media

Geoelectrical measurement and modeling of biogeochemical breakthrough behavior during microbial activity

Spectral induced polarization signatures of abiotic FeS precipitation

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