Electrokinetics applied in remediation of subsurface soil contaminated with chlorinated ethenes – A review

Lisbeth M. Ottosen*, Thomas H. Larsen, Pernille Erland Jensen, Gunvor Marie Kirkelund, Henriette Kerrn-Jespersen, Nina Tuxen, Bente Højlund Hyldegaard

*Corresponding author for this work

Research output: Contribution to journalReviewResearchpeer-review

Abstract

Electrokinetics is being applied in combination with common insituremediation technologies, e.g. permeable reactive barriers, bioremediation and in-situ chemical oxidation, to overcome experienced limitations in remediation of chlorinated ethenes in low-permeable subsurface soils. The purpose of this review is to evaluate state-of-theart for identification of major knowledge gaps to obtain robust and successful field-implementations. Some of the major knowledge gaps include the behavior and influence of induced transient changes in soil systems, transport velocities of chlorinated ethenes, and significance of site-specific parameters on transport velocities, e.g. heterogeneous soils and hydrogeochemistry. Furthermore, the various ways of reporting voltage distribution and transport rates complicate the comparison of transport velocities across studies. It was found, that for the combined EK-techniques, it is important to control the pH and redox changes caused by electrolysis for steady transport, uniform distribution of the electric field etc. Specifically for electrokinetically enhanced bioremediation, delivery of lactate and biodegrading bacteria is of the same order of magnitude. This review shows that enhancement of remediation technologies can be achieved by electrokinetics, but major knowledge gaps must be examined to mature EK as robust methods for successful remediation of chlorinated ethene contaminated sites.
Original languageEnglish
JournalChemosphere
Volume235
Pages (from-to)113-125
ISSN0045-6535
DOIs
Publication statusPublished - 2019

Keywords

  • Chlorinated ethenes
  • Electrokinetics
  • Low permeable soil
  • PCE
  • TCE
  • Transport velosities

Cite this

Ottosen, Lisbeth M. ; Larsen, Thomas H. ; Jensen, Pernille Erland ; Kirkelund, Gunvor Marie ; Kerrn-Jespersen, Henriette ; Tuxen, Nina ; Hyldegaard, Bente Højlund. / Electrokinetics applied in remediation of subsurface soil contaminated with chlorinated ethenes – A review. In: Chemosphere. 2019 ; Vol. 235. pp. 113-125.
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abstract = "Electrokinetics is being applied in combination with common insituremediation technologies, e.g. permeable reactive barriers, bioremediation and in-situ chemical oxidation, to overcome experienced limitations in remediation of chlorinated ethenes in low-permeable subsurface soils. The purpose of this review is to evaluate state-of-theart for identification of major knowledge gaps to obtain robust and successful field-implementations. Some of the major knowledge gaps include the behavior and influence of induced transient changes in soil systems, transport velocities of chlorinated ethenes, and significance of site-specific parameters on transport velocities, e.g. heterogeneous soils and hydrogeochemistry. Furthermore, the various ways of reporting voltage distribution and transport rates complicate the comparison of transport velocities across studies. It was found, that for the combined EK-techniques, it is important to control the pH and redox changes caused by electrolysis for steady transport, uniform distribution of the electric field etc. Specifically for electrokinetically enhanced bioremediation, delivery of lactate and biodegrading bacteria is of the same order of magnitude. This review shows that enhancement of remediation technologies can be achieved by electrokinetics, but major knowledge gaps must be examined to mature EK as robust methods for successful remediation of chlorinated ethene contaminated sites.",
keywords = "Chlorinated ethenes, Electrokinetics, Low permeable soil, PCE, TCE, Transport velosities",
author = "Ottosen, {Lisbeth M.} and Larsen, {Thomas H.} and Jensen, {Pernille Erland} and Kirkelund, {Gunvor Marie} and Henriette Kerrn-Jespersen and Nina Tuxen and Hyldegaard, {Bente H{\o}jlund}",
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Electrokinetics applied in remediation of subsurface soil contaminated with chlorinated ethenes – A review. / Ottosen, Lisbeth M.; Larsen, Thomas H.; Jensen, Pernille Erland; Kirkelund, Gunvor Marie; Kerrn-Jespersen, Henriette; Tuxen, Nina; Hyldegaard, Bente Højlund.

In: Chemosphere, Vol. 235, 2019, p. 113-125.

Research output: Contribution to journalReviewResearchpeer-review

TY - JOUR

T1 - Electrokinetics applied in remediation of subsurface soil contaminated with chlorinated ethenes – A review

AU - Ottosen, Lisbeth M.

AU - Larsen, Thomas H.

AU - Jensen, Pernille Erland

AU - Kirkelund, Gunvor Marie

AU - Kerrn-Jespersen, Henriette

AU - Tuxen, Nina

AU - Hyldegaard, Bente Højlund

PY - 2019

Y1 - 2019

N2 - Electrokinetics is being applied in combination with common insituremediation technologies, e.g. permeable reactive barriers, bioremediation and in-situ chemical oxidation, to overcome experienced limitations in remediation of chlorinated ethenes in low-permeable subsurface soils. The purpose of this review is to evaluate state-of-theart for identification of major knowledge gaps to obtain robust and successful field-implementations. Some of the major knowledge gaps include the behavior and influence of induced transient changes in soil systems, transport velocities of chlorinated ethenes, and significance of site-specific parameters on transport velocities, e.g. heterogeneous soils and hydrogeochemistry. Furthermore, the various ways of reporting voltage distribution and transport rates complicate the comparison of transport velocities across studies. It was found, that for the combined EK-techniques, it is important to control the pH and redox changes caused by electrolysis for steady transport, uniform distribution of the electric field etc. Specifically for electrokinetically enhanced bioremediation, delivery of lactate and biodegrading bacteria is of the same order of magnitude. This review shows that enhancement of remediation technologies can be achieved by electrokinetics, but major knowledge gaps must be examined to mature EK as robust methods for successful remediation of chlorinated ethene contaminated sites.

AB - Electrokinetics is being applied in combination with common insituremediation technologies, e.g. permeable reactive barriers, bioremediation and in-situ chemical oxidation, to overcome experienced limitations in remediation of chlorinated ethenes in low-permeable subsurface soils. The purpose of this review is to evaluate state-of-theart for identification of major knowledge gaps to obtain robust and successful field-implementations. Some of the major knowledge gaps include the behavior and influence of induced transient changes in soil systems, transport velocities of chlorinated ethenes, and significance of site-specific parameters on transport velocities, e.g. heterogeneous soils and hydrogeochemistry. Furthermore, the various ways of reporting voltage distribution and transport rates complicate the comparison of transport velocities across studies. It was found, that for the combined EK-techniques, it is important to control the pH and redox changes caused by electrolysis for steady transport, uniform distribution of the electric field etc. Specifically for electrokinetically enhanced bioremediation, delivery of lactate and biodegrading bacteria is of the same order of magnitude. This review shows that enhancement of remediation technologies can be achieved by electrokinetics, but major knowledge gaps must be examined to mature EK as robust methods for successful remediation of chlorinated ethene contaminated sites.

KW - Chlorinated ethenes

KW - Electrokinetics

KW - Low permeable soil

KW - PCE

KW - TCE

KW - Transport velosities

U2 - 10.1016/j.chemosphere.2019.06.075

DO - 10.1016/j.chemosphere.2019.06.075

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SP - 113

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JF - Chemosphere

SN - 0045-6535

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