| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Binley, Andrew
Lancaster University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2021A linked geomorphological and geophysical modelling methodology applied to an active landslidecitations
- 2019Monitoring redox sensitive conditions at the groundwater interface using electrical resistivity and self-potentialcitations
- 2019Laboratory spectral induced polarisation signatures associated with iron and manganese oxide dissolution because of anaerobic degradationcitations
- 2019Geoelectrical signatures of redox processes
- 2015Self-potential monitoring of the enhanced biodegradation of an organic contaminant using a bioelectrochemical cellcitations
- 2015Anomalous solute transport in saturated porous mediacitations
- 2015Anomalous solute transport in saturated porous media : linking transport model parameters to electrical and nuclear magnetic resonance properties
- 2013Laboratory SIP signatures associated with oxidation of disseminated metal sulphidescitations
- 2012A stochastic analysis of cross-hole ground-penetrating rada zero-offset profiles for subsurface characterizationcitations
- 2006Improved hydrogeophysical characterization using joint inversion of cross-hole electrical resistance and ground-penetrating radar traveltime data.citations
- 2005Electrical properties of partially saturated sandstones.
Places of action
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article
Laboratory SIP signatures associated with oxidation of disseminated metal sulphides
Abstract
Oxidation ofmetal sulfideminerals is responsible for the generation of acidic waters rich in sulfate and metals. When associated with the oxidation of sulfide ore mine waste deposits the resulting pore water is called acid mine drainage (AMD); AMD is a known environmental problem that affects surface and ground waters. Characterization of oxidation processes in-situ is challenging,<br/>particularly at the field scale. Geophysical techniques, spectral induced polarization (SIP) in particular, may provide a means of such investigation.We performed laboratory experiments to assess the sensitivity of the SIP method to the oxidation mechanisms of common sulfideminerals found in mine waste deposits, i.e., pyrite and pyrrhotite, when the primary oxidant agent is<br/>dissolved oxygen. We found that SIP parameters, e.g., phase shift, the imaginary component of electrical conductivity and total chargeability, decrease as the time of exposure to oxidation and oxidation degree increase. This observation suggests that dissolution–depletion of the mineral surface reduces the capacitive properties and polarizability of the sulfide minerals. However, small increases in the phase shift and imaginary conductivity do occur during oxidation. These<br/>transient increases appear to correlatewith increases of soluble oxidizing products, e.g., Fe2+ and Fe3+ in solution; precipitation of secondary minerals and the formation of a passivating layer to oxidation coating the mineral surface may also contribute to these increases. In contrast, the real component of electrical conductivity associated with electrolytic, electronic and interfacial<br/>conductance is sensitive to changes in the pore fluid chemistry as a result of the soluble oxidation products released (Fe2+ and Fe3+), particularly for the case of pyrrhotite minerals.