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@article{1ce54ffd09ee47b4a49d3c440d3adda9,
title = "ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 2. Groundwater contaminant mass discharge reduction",
keywords = "ZVI-Clay, Zero valent iron, Soil mixing, Chlorinated solvents, DNAPL, Contaminant mass discharge",
publisher = "Elsevier BV",
author = "Fjordbøge, {Annika Sidelmann} and Lange, {Ida Vedel} and Bjerg, {Poul Løgstrup} and Binning, {Philip John} and Charlotte Riis and Peter Kjeldsen",
year = "2012",
doi = "10.1016/j.jconhyd.2012.08.009",
volume = "140-141",
pages = "67--79",
journal = "Journal of Contaminant Hydrology",
issn = "0169-7722",

}

RIS

TY - JOUR

T1 - ZVI-Clay remediation of a chlorinated solvent source zone, Skuldelev, Denmark: 2. Groundwater contaminant mass discharge reduction

A1 - Fjordbøge,Annika Sidelmann

A1 - Lange,Ida Vedel

A1 - Bjerg,Poul Løgstrup

A1 - Binning,Philip John

A1 - Riis,Charlotte

A1 - Kjeldsen,Peter

AU - Fjordbøge,Annika Sidelmann

AU - Lange,Ida Vedel

AU - Bjerg,Poul Løgstrup

AU - Binning,Philip John

AU - Riis,Charlotte

AU - Kjeldsen,Peter

PB - Elsevier BV

PY - 2012

Y1 - 2012

N2 - The impact of source mass depletion on the down-gradient contaminant mass discharge was monitored for a 19-month period as a part of a field demonstration of the ZVI-Clay soil mixing remediation technology. Groundwater samples were collected from conventional monitoring wells (120 samples) and a dense network of multilevel samplers (640 samples). The hydraulic gradient and conductivity were determined. Depletion of the contaminant source is described in the companion paper (Fjordbøge et al., 2012). Field data showed four distinct phases for PCE mass discharge: (1) baseline conditions, (2) initial rapid reduction, (3) temporary increase, and (4) slow long-term reduction. Numerical modeling was utilized to develop a conceptual understanding of the four phases and to identify the governing processes. The initial rapid reduction of mass discharge was a result of the changed hydraulic properties in the source zone after soil mixing. The subsequent phases depended on the changed accessibility of the contaminant mass after mixing, the rate of source depletion, and the concentration gradient at the boundaries of the mixed source zone. Overall, ZVI-Clay soil mixing resulted in a significant down-gradient contaminant mass discharge reduction (76%) for the parent compound (PCE), while the overall reduction of chlorinated ethenes was smaller (21%).

AB - The impact of source mass depletion on the down-gradient contaminant mass discharge was monitored for a 19-month period as a part of a field demonstration of the ZVI-Clay soil mixing remediation technology. Groundwater samples were collected from conventional monitoring wells (120 samples) and a dense network of multilevel samplers (640 samples). The hydraulic gradient and conductivity were determined. Depletion of the contaminant source is described in the companion paper (Fjordbøge et al., 2012). Field data showed four distinct phases for PCE mass discharge: (1) baseline conditions, (2) initial rapid reduction, (3) temporary increase, and (4) slow long-term reduction. Numerical modeling was utilized to develop a conceptual understanding of the four phases and to identify the governing processes. The initial rapid reduction of mass discharge was a result of the changed hydraulic properties in the source zone after soil mixing. The subsequent phases depended on the changed accessibility of the contaminant mass after mixing, the rate of source depletion, and the concentration gradient at the boundaries of the mixed source zone. Overall, ZVI-Clay soil mixing resulted in a significant down-gradient contaminant mass discharge reduction (76%) for the parent compound (PCE), while the overall reduction of chlorinated ethenes was smaller (21%).

KW - ZVI-Clay

KW - Zero valent iron

KW - Soil mixing

KW - Chlorinated solvents

KW - DNAPL

KW - Contaminant mass discharge

U2 - 10.1016/j.jconhyd.2012.08.009

DO - 10.1016/j.jconhyd.2012.08.009

JO - Journal of Contaminant Hydrology

JF - Journal of Contaminant Hydrology

SN - 0169-7722

VL - 140-141

SP - 67

EP - 79

ER -