The relative influence of electrokinetic remediation design on the removal of As, Cu, Pb and Sb from shooting range soils

Kristine B. Pedersen*, Pernille Erland Jensen, Lisbeth M. Ottosen, John Barlindhaug

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Electrodialytic remediation was applied for remediation of shooting range soils from two sites in Norway for which the targeted metals were As, Cu, Pb and Sb. Up to 75% Cu and 78% Pb was removed in the treatment, while low removal of As (< 3%) and Sb (14%) was observed suggesting low mobility and bioavailability of these two metals in the studied soils. Removal of metals from the natural soil matrix (Al, Fe, K, Mg and Mn) were with the exception of Mn generally low (< 20%) making it possible to target the removal of Cu and Pb while limiting the disturbance to the natural soil matrix. Multivariate design and analysis was applied for assessing the efficiency of electrodialytic remediation treatment and variable importance varied for each of the studied metals. In general, applying a stirred set-up improved the metal removal, acidification time and reduced the energy consumption. The placement of the anode directly in the soil did not significantly influence the removal of Al, Mg, Mn, As and Pb, while moderately influencing the removal of Cu. Multivariate analysis (projections onto latent structures) revealed similar variable importance and optimal settings for removal of Cu and Pb. It is hence possible to simultaneously optimise the removal by applying a stirred set-up, placement of the anode directly in the soil suspension, sieving the soil (< 2mm fraction) and long treatment time (35 days). The study showed that multivariate analysis is a valuable tool for evaluating remediation measures depending soil characteristics and this way be used for selection of site-specific best available remediation methods.
Original languageEnglish
JournalEngineering Geology
Volume238
Pages (from-to)52-61
ISSN0013-7952
DOIs
Publication statusPublished - 2018

Keywords

  • Heavy metals
  • Electrokinetic remediation
  • Polluted soil
  • Metal speciation
  • Projections onto latent structures

Cite this

@article{a069720fad004c3aaed1495a2d23e54b,
title = "The relative influence of electrokinetic remediation design on the removal of As, Cu, Pb and Sb from shooting range soils",
abstract = "Electrodialytic remediation was applied for remediation of shooting range soils from two sites in Norway for which the targeted metals were As, Cu, Pb and Sb. Up to 75{\%} Cu and 78{\%} Pb was removed in the treatment, while low removal of As (< 3{\%}) and Sb (14{\%}) was observed suggesting low mobility and bioavailability of these two metals in the studied soils. Removal of metals from the natural soil matrix (Al, Fe, K, Mg and Mn) were with the exception of Mn generally low (< 20{\%}) making it possible to target the removal of Cu and Pb while limiting the disturbance to the natural soil matrix. Multivariate design and analysis was applied for assessing the efficiency of electrodialytic remediation treatment and variable importance varied for each of the studied metals. In general, applying a stirred set-up improved the metal removal, acidification time and reduced the energy consumption. The placement of the anode directly in the soil did not significantly influence the removal of Al, Mg, Mn, As and Pb, while moderately influencing the removal of Cu. Multivariate analysis (projections onto latent structures) revealed similar variable importance and optimal settings for removal of Cu and Pb. It is hence possible to simultaneously optimise the removal by applying a stirred set-up, placement of the anode directly in the soil suspension, sieving the soil (< 2mm fraction) and long treatment time (35 days). The study showed that multivariate analysis is a valuable tool for evaluating remediation measures depending soil characteristics and this way be used for selection of site-specific best available remediation methods.",
keywords = "Heavy metals, Electrokinetic remediation, Polluted soil, Metal speciation, Projections onto latent structures",
author = "Pedersen, {Kristine B.} and Jensen, {Pernille Erland} and Ottosen, {Lisbeth M.} and John Barlindhaug",
year = "2018",
doi = "10.1016/j.enggeo.2018.03.005",
language = "English",
volume = "238",
pages = "52--61",
journal = "Engineering Geology",
issn = "0013-7952",
publisher = "Elsevier",

}

The relative influence of electrokinetic remediation design on the removal of As, Cu, Pb and Sb from shooting range soils. / Pedersen, Kristine B.; Jensen, Pernille Erland; Ottosen, Lisbeth M.; Barlindhaug, John.

In: Engineering Geology, Vol. 238, 2018, p. 52-61.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - The relative influence of electrokinetic remediation design on the removal of As, Cu, Pb and Sb from shooting range soils

AU - Pedersen, Kristine B.

AU - Jensen, Pernille Erland

AU - Ottosen, Lisbeth M.

AU - Barlindhaug, John

PY - 2018

Y1 - 2018

N2 - Electrodialytic remediation was applied for remediation of shooting range soils from two sites in Norway for which the targeted metals were As, Cu, Pb and Sb. Up to 75% Cu and 78% Pb was removed in the treatment, while low removal of As (< 3%) and Sb (14%) was observed suggesting low mobility and bioavailability of these two metals in the studied soils. Removal of metals from the natural soil matrix (Al, Fe, K, Mg and Mn) were with the exception of Mn generally low (< 20%) making it possible to target the removal of Cu and Pb while limiting the disturbance to the natural soil matrix. Multivariate design and analysis was applied for assessing the efficiency of electrodialytic remediation treatment and variable importance varied for each of the studied metals. In general, applying a stirred set-up improved the metal removal, acidification time and reduced the energy consumption. The placement of the anode directly in the soil did not significantly influence the removal of Al, Mg, Mn, As and Pb, while moderately influencing the removal of Cu. Multivariate analysis (projections onto latent structures) revealed similar variable importance and optimal settings for removal of Cu and Pb. It is hence possible to simultaneously optimise the removal by applying a stirred set-up, placement of the anode directly in the soil suspension, sieving the soil (< 2mm fraction) and long treatment time (35 days). The study showed that multivariate analysis is a valuable tool for evaluating remediation measures depending soil characteristics and this way be used for selection of site-specific best available remediation methods.

AB - Electrodialytic remediation was applied for remediation of shooting range soils from two sites in Norway for which the targeted metals were As, Cu, Pb and Sb. Up to 75% Cu and 78% Pb was removed in the treatment, while low removal of As (< 3%) and Sb (14%) was observed suggesting low mobility and bioavailability of these two metals in the studied soils. Removal of metals from the natural soil matrix (Al, Fe, K, Mg and Mn) were with the exception of Mn generally low (< 20%) making it possible to target the removal of Cu and Pb while limiting the disturbance to the natural soil matrix. Multivariate design and analysis was applied for assessing the efficiency of electrodialytic remediation treatment and variable importance varied for each of the studied metals. In general, applying a stirred set-up improved the metal removal, acidification time and reduced the energy consumption. The placement of the anode directly in the soil did not significantly influence the removal of Al, Mg, Mn, As and Pb, while moderately influencing the removal of Cu. Multivariate analysis (projections onto latent structures) revealed similar variable importance and optimal settings for removal of Cu and Pb. It is hence possible to simultaneously optimise the removal by applying a stirred set-up, placement of the anode directly in the soil suspension, sieving the soil (< 2mm fraction) and long treatment time (35 days). The study showed that multivariate analysis is a valuable tool for evaluating remediation measures depending soil characteristics and this way be used for selection of site-specific best available remediation methods.

KW - Heavy metals

KW - Electrokinetic remediation

KW - Polluted soil

KW - Metal speciation

KW - Projections onto latent structures

U2 - 10.1016/j.enggeo.2018.03.005

DO - 10.1016/j.enggeo.2018.03.005

M3 - Journal article

VL - 238

SP - 52

EP - 61

JO - Engineering Geology

JF - Engineering Geology

SN - 0013-7952

ER -