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024 7 _ |2 DOI
|a 10.1111/j.1365-246X.2011.05332.x
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|a Geochemistry & Geophysics
100 1 _ |0 P:(DE-HGF)0
|a Schwartz, N.
|b 0
245 _ _ |a The effect of NAPL on the electrical properties of unsaturated porous media
260 _ _ |a Oxford
|b Wiley-Blackwell
|c 2012
300 _ _ |a 1007 - 1011
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440 _ 0 |0 23081
|a Geophysical Journal International
|v 188
|x 0956-540X
|y 3
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a This research was supported in part by the Israel Science Foundation (grant 381/09) and by the Umbrella cooperation (Technion, RWTH Aachen University and Forschungszentrum Julich). We are also grateful for the assistance of Odilia Esser (IBG 3).
520 _ _ |a The spectral induced polarization signature of porous media contaminated with non-aqueous phase liquid (NAPL) was studied. Using an accurate measurement system, the complex electrical conductivity of unsaturated porous media contaminated with either diesel fuel or motor oil at a constant water saturation was determined. Counter intuitively, the results show that replacing air with NAPL increases the real part of the complex conductivity of unsaturated porous media. We interpret the results in terms of electrochemical polarization, and suggest that polar compounds contained in the NAPL adsorb to the mineral surface leading to release of inorganic ions to the pore water, which affects both the fluid and surface conductivity. In addition, we observed a decrease in the polarization followed by further addition of NAPL, which we relate to a lower mobility of the adsorbed polar compound. This study allows a better understanding of the electrical signature of NAPL contaminated porous media, especially in variably saturated conditions.
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|a Electrical properties
653 2 0 |2 Author
|a Electromagnetic theory
653 2 0 |2 Author
|a Hydrogeophysics
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|a Huisman, J.A.
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700 1 _ |0 P:(DE-HGF)0
|a Furman, A.
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|a 10.1111/j.1365-246X.2011.05332.x
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|t Geophysical journal international
|v 188
|x 0956-540X
|y 2012
856 7 _ |u http://dx.doi.org/10.1111/j.1365-246X.2011.05332.x
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