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ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 1. Site description and contaminant source mass reduction. / Fjordbøge, Annika Sidelmann; Riis, Charlotte; Christensen, Anders G.; Kjeldsen, Peter.

In: Journal of Contaminant Hydrology, Vol. 140-141, 2012, p. 56-66.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Fjordbøge, Annika Sidelmann; Riis, Charlotte; Christensen, Anders G.; Kjeldsen, Peter / ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 1. Site description and contaminant source mass reduction.

In: Journal of Contaminant Hydrology, Vol. 140-141, 2012, p. 56-66.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{6b514e3ff4984d4eb3f3fa439529d556,
title = "ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 1. Site description and contaminant source mass reduction",
keywords = "ZVI-Clay, Zero valent iron, Soil mixing, Source remediation, Chlorinated solvents, DNAPL",
publisher = "Elsevier BV",
author = "Fjordbøge, {Annika Sidelmann} and Charlotte Riis and Christensen, {Anders G.} and Peter Kjeldsen",
year = "2012",
doi = "10.1016/j.jconhyd.2012.08.007",
volume = "140-141",
pages = "56--66",
journal = "Journal of Contaminant Hydrology",
issn = "0169-7722",

}

RIS

TY - JOUR

T1 - ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 1. Site description and contaminant source mass reduction

A1 - Fjordbøge,Annika Sidelmann

A1 - Riis,Charlotte

A1 - Christensen,Anders G.

A1 - Kjeldsen,Peter

AU - Fjordbøge,Annika Sidelmann

AU - Riis,Charlotte

AU - Christensen,Anders G.

AU - Kjeldsen,Peter

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - Field investigations on the effects of ZVI-Clay soil mixing were conducted at a small DNAPL source zone with PCE as the parent compound. In a one-year monitoring program, soil samples were collected at three horizontal sampling planes (2.5, 5.0 and 7.5m bgs.). PCE was found to have a pseudo first-order degradation half-life of 47days resulting in more than 99% depletion of the source mass after one year. The main degradation product was ethene, while only low concentrations of the primarily biotic sequential degradation products (cDCE, VC) were detected. The soil mixing resulted in more homogeneous vertical conditions, while the horizontal homogenization was very limited. Iron was delivered in the full targeted depth with an average iron enrichment of 3.1%, and an average decline in the oxidation–reduction potential of more than 500mV. Due to the applied top-down addition of ZVI, the iron content decreased from 4.6% to 2.1% on average over a depth of 5m; hence, there is a potential for optimization of the delivery method. Most in situ technologies are limited by subsurface heterogeneities, whereby the successful dispersion of geological units and contaminants holds great promise for remediation of DNAPL source zones with ZVI-Clay soil mixing.

AB - Field investigations on the effects of ZVI-Clay soil mixing were conducted at a small DNAPL source zone with PCE as the parent compound. In a one-year monitoring program, soil samples were collected at three horizontal sampling planes (2.5, 5.0 and 7.5m bgs.). PCE was found to have a pseudo first-order degradation half-life of 47days resulting in more than 99% depletion of the source mass after one year. The main degradation product was ethene, while only low concentrations of the primarily biotic sequential degradation products (cDCE, VC) were detected. The soil mixing resulted in more homogeneous vertical conditions, while the horizontal homogenization was very limited. Iron was delivered in the full targeted depth with an average iron enrichment of 3.1%, and an average decline in the oxidation–reduction potential of more than 500mV. Due to the applied top-down addition of ZVI, the iron content decreased from 4.6% to 2.1% on average over a depth of 5m; hence, there is a potential for optimization of the delivery method. Most in situ technologies are limited by subsurface heterogeneities, whereby the successful dispersion of geological units and contaminants holds great promise for remediation of DNAPL source zones with ZVI-Clay soil mixing.

KW - ZVI-Clay

KW - Zero valent iron

KW - Soil mixing

KW - Source remediation

KW - Chlorinated solvents

KW - DNAPL

U2 - 10.1016/j.jconhyd.2012.08.007

DO - 10.1016/j.jconhyd.2012.08.007

JO - Journal of Contaminant Hydrology

JF - Journal of Contaminant Hydrology

SN - 0169-7722

VL - 140-141

SP - 56

EP - 66

ER -