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Resistivity imaging of electrokinetic transport in soil.

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Resistivity imaging of electrokinetic transport in soil. / West, L. J.; Stewart, D. I.; Binley, Andrew M. et al.
In: Engineering Geology, Vol. 53, No. 2, 06.1999, p. 205-219.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

West, LJ, Stewart, DI, Binley, AM & Shaw, B 1999, 'Resistivity imaging of electrokinetic transport in soil.', Engineering Geology, vol. 53, no. 2, pp. 205-219. https://doi.org/10.1016/S0013-7952(99)00034-4

APA

West, L. J., Stewart, D. I., Binley, A. M., & Shaw, B. (1999). Resistivity imaging of electrokinetic transport in soil. Engineering Geology, 53(2), 205-219. https://doi.org/10.1016/S0013-7952(99)00034-4

Vancouver

West LJ, Stewart DI, Binley AM, Shaw B. Resistivity imaging of electrokinetic transport in soil. Engineering Geology. 1999 Jun;53(2):205-219. doi: 10.1016/S0013-7952(99)00034-4

Author

West, L. J. ; Stewart, D. I. ; Binley, Andrew M. et al. / Resistivity imaging of electrokinetic transport in soil. In: Engineering Geology. 1999 ; Vol. 53, No. 2. pp. 205-219.

Bibtex

@article{cedc450cd71d4a139687c360422cc5d0,
title = "Resistivity imaging of electrokinetic transport in soil.",
abstract = "Electrical resistance imaging of soil specimens during electrokinetic treatment is reported. Column experiments were carried out on Speswhite kaolinite contaminated with lead nitrate to levels both above and below its cation exchange capacity (CEC). Post test chemical analyses of the specimens and their pore fluids show that resistivity variations correlate with changes in pore fluid chemistry but do not show the extent of decontamination. Regions of high resistivity correspond with precipitation zones within the specimens whereas regions of low resistivity correspond with regions of high pore fluid ionic strength. Where the contamination level is below the CEC, decontamination is slow as lead ions are mostly sorbed to the clay so most of the current is carried by electrolysis products and clay dissolution products. A broad resistive zone forms over the cathode half where hydroxyl and HCO−3 ions formed in the cathode reservoir precipitate clay with dissolution products and other ions. Where the contamination level is above the CEC, lead ions are initially major charge carriers and decontamination over the bulk of the specimen is rapid. However, lead still precipitates immediately adjacent to the cathode reservoir to form a narrow resistive region.",
keywords = "Clays, Contaminated land, Electrokinetics, Environmental geotechnics, Pollution migration/control, Resistivity surveys",
author = "West, {L. J.} and Stewart, {D. I.} and Binley, {Andrew M.} and B. Shaw",
year = "1999",
month = jun,
doi = "10.1016/S0013-7952(99)00034-4",
language = "English",
volume = "53",
pages = "205--219",
journal = "Engineering Geology",
issn = "0013-7952",
publisher = "Elsevier",
number = "2",

}

RIS

TY - JOUR

T1 - Resistivity imaging of electrokinetic transport in soil.

AU - West, L. J.

AU - Stewart, D. I.

AU - Binley, Andrew M.

AU - Shaw, B.

PY - 1999/6

Y1 - 1999/6

N2 - Electrical resistance imaging of soil specimens during electrokinetic treatment is reported. Column experiments were carried out on Speswhite kaolinite contaminated with lead nitrate to levels both above and below its cation exchange capacity (CEC). Post test chemical analyses of the specimens and their pore fluids show that resistivity variations correlate with changes in pore fluid chemistry but do not show the extent of decontamination. Regions of high resistivity correspond with precipitation zones within the specimens whereas regions of low resistivity correspond with regions of high pore fluid ionic strength. Where the contamination level is below the CEC, decontamination is slow as lead ions are mostly sorbed to the clay so most of the current is carried by electrolysis products and clay dissolution products. A broad resistive zone forms over the cathode half where hydroxyl and HCO−3 ions formed in the cathode reservoir precipitate clay with dissolution products and other ions. Where the contamination level is above the CEC, lead ions are initially major charge carriers and decontamination over the bulk of the specimen is rapid. However, lead still precipitates immediately adjacent to the cathode reservoir to form a narrow resistive region.

AB - Electrical resistance imaging of soil specimens during electrokinetic treatment is reported. Column experiments were carried out on Speswhite kaolinite contaminated with lead nitrate to levels both above and below its cation exchange capacity (CEC). Post test chemical analyses of the specimens and their pore fluids show that resistivity variations correlate with changes in pore fluid chemistry but do not show the extent of decontamination. Regions of high resistivity correspond with precipitation zones within the specimens whereas regions of low resistivity correspond with regions of high pore fluid ionic strength. Where the contamination level is below the CEC, decontamination is slow as lead ions are mostly sorbed to the clay so most of the current is carried by electrolysis products and clay dissolution products. A broad resistive zone forms over the cathode half where hydroxyl and HCO−3 ions formed in the cathode reservoir precipitate clay with dissolution products and other ions. Where the contamination level is above the CEC, lead ions are initially major charge carriers and decontamination over the bulk of the specimen is rapid. However, lead still precipitates immediately adjacent to the cathode reservoir to form a narrow resistive region.

KW - Clays

KW - Contaminated land

KW - Electrokinetics

KW - Environmental geotechnics

KW - Pollution migration/control

KW - Resistivity surveys

U2 - 10.1016/S0013-7952(99)00034-4

DO - 10.1016/S0013-7952(99)00034-4

M3 - Journal article

VL - 53

SP - 205

EP - 219

JO - Engineering Geology

JF - Engineering Geology

SN - 0013-7952

IS - 2

ER -