1887

Abstract

Summary

The spectral induced polarization (SIP) method is a promising method for many near surface applications, including characterization of contaminated soil. In this study, SIP measurements, high-resolution X-ray tomography and image analysis are combined to investigate clean and tetrachloroethylene (PCE) contaminated sand. This is the first known combination of these methods and the aim of this paper is to demonstrate some powerful possibilities of using X-ray tomography in SIP research. X-ray tomography enables a direct visual control of the sample conditions and quantification of relevant sample properties via image analysis techniques. The image stacks from were processed with image analysis techniques, so that individual grains and PCE phases could be extracted from the sample volume. This enabled calculations of relevant sample properties such as PCE blob volumes, grain diameter, -surface area and —eccentricity as well as bulk porosity, specific surface area to pore volume and proportion of high-density grains. We conclude that the combination of SIP measurements and X-ray tomography have a great potential of increasing the understanding of SIP mechanisms in geological materials. The tomography results can be used both to calculate properties relevant for SIP interpretation as well as 3D modelling of the pore space.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201702028
2017-09-03
2024-03-29
Loading full text...

Full text loading...

References

  1. Atekwana, E.A. & Slater, L.D.
    , 2009. Biogeophysics: A new frontier in Earth science research. Reviews of Geophysics, 47(4), pp.1–30.
    [Google Scholar]
  2. Johansson, S., Fiandaca, G. & Dahlin, T.
    , 2015. Influence of non-aqueous phase liquid configuration on induced polarization parameters: Conceptual models applied to a time-domain field case study. Journal of Applied Geophysics, 123, pp.295–309.
    [Google Scholar]
  3. Kemna, A., Binley, A., Cassiani, G., Niederleithinger, E., Revil, A., Slater, L., Williams, K.H., Flores Orozco, A., Haegel, F.-H., Hördt, A., Kruschwitz, S., Leroux, V., Titov, K. & Zimmermann, E.
    , 2012. An overview of the spectral induced polarization method for near-surface applications. Near Surface Geophysics, 10, pp.453–468.
    [Google Scholar]
  4. Revil, A. & Florsch, N.
    , 2010. Determination of permeability from spectral induced polarization in granular media. Geophysical Journal International, pp.1480–1498.
    [Google Scholar]
  5. Scott, J.B.T. & Barker, R.D.
    , 2003. Determining pore-throat size in Permo-Triassic sandstones from low-frequency electrical spectroscopy. Geophysical Research Letters, 30(9), p.1450.
    [Google Scholar]
  6. Slater, L. & Lesmes, D.P.
    , 2002. Electrical-hydraulic relationships observed for unconsolidated sediments. Water Resources Research, 38(10), pp.1–13.
    [Google Scholar]
  7. Weller, A., Slater, L., Huisman, J.A., Esser, O. & Haegel, F.-H.
    , 2015. On the specific polarizability of sands and sand-clay mixtures. Geophysics, 80(3), pp.A57–A61.
    [Google Scholar]
  8. Weller, A. & Slater, L.D.
    , 2015. Induced polarization dependence on pore space geometry : Empirical observations and mechanistic predictions. Journal of Applied Geophysics, 123, pp.310–315.
    [Google Scholar]
  9. Wildenschild, D. & Sheppard, A.P.
    , 2013. X-ray imaging and analysis techniques for quantifying pore-scale structure and processes in subsurface porous medium systems. Advances in Water Resources, 51, pp.217–246.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201702028
Loading
/content/papers/10.3997/2214-4609.201702028
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error