Influence of electrode placement for mobilising and removing metals during electrodialytic remediation of metals from shooting range soil

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 to a shooting range soil to investigate the influence of electrode placement on the removal and binding of metals during the treatment. The set-up was based on a 2-compartment cell, in which the cathode was separated from the soil by a cation exchange membrane and the anode was placed directly in the soil, thereby introducing protons and oxygen directly in the soil. Mobilisation of metals from less available fractions (oxidisable and residual) in the soil occurred, due to oxidation/dissolution of insoluble/soluble organic matter and possibly metal oxides in the residual fraction.

The transport via electromigration out of the soil and/or re-precipitation in other fractions of the soil (oxidisable, reducible, exchangeable) depended on the metal. More than 30% of the initial content of Mn, Cd, Cu, Pb and Zn and less than 20% of the initial content of Al, Fe, K, Mg, As, Cr and Ni was transported out of the soil. By decreasing the distance between the electrodes from 3.0 to 1.5 cm, the removal of the targeted metal for remediation, Pb, was improved by more than 200%, from 14 to 31%. A similar removal could be achieved in experiments with long distance between electrodes (3.0 cm) by increasing the current intensity from 4 to 10 mA and/or the remediation time from 7 to 35 d. The experiments showed that the design and optimisation of electrodialytic remediation depends on the targeted metal and metal partitioning.
Original languageEnglish
JournalChemosphere
Volume210
Pages (from-to)683-691
Number of pages9
ISSN0045-6535
DOIs
Publication statusPublished - 2018

Keywords

  • Electrokinetic remediation
  • Heavy metals
  • Shooting range soil
  • Metal fractionation

Cite this

@article{264412b1fad44170b3958e5b1d7bdece,
title = "Influence of electrode placement for mobilising and removing metals during electrodialytic remediation of metals from shooting range soil",
abstract = "Electrodialytic remediation was applied to a shooting range soil to investigate the influence of electrode placement on the removal and binding of metals during the treatment. The set-up was based on a 2-compartment cell, in which the cathode was separated from the soil by a cation exchange membrane and the anode was placed directly in the soil, thereby introducing protons and oxygen directly in the soil. Mobilisation of metals from less available fractions (oxidisable and residual) in the soil occurred, due to oxidation/dissolution of insoluble/soluble organic matter and possibly metal oxides in the residual fraction.The transport via electromigration out of the soil and/or re-precipitation in other fractions of the soil (oxidisable, reducible, exchangeable) depended on the metal. More than 30{\%} of the initial content of Mn, Cd, Cu, Pb and Zn and less than 20{\%} of the initial content of Al, Fe, K, Mg, As, Cr and Ni was transported out of the soil. By decreasing the distance between the electrodes from 3.0 to 1.5 cm, the removal of the targeted metal for remediation, Pb, was improved by more than 200{\%}, from 14 to 31{\%}. A similar removal could be achieved in experiments with long distance between electrodes (3.0 cm) by increasing the current intensity from 4 to 10 mA and/or the remediation time from 7 to 35 d. The experiments showed that the design and optimisation of electrodialytic remediation depends on the targeted metal and metal partitioning.",
keywords = "Electrokinetic remediation, Heavy metals, Shooting range soil, Metal fractionation",
author = "Pedersen, {Kristine B.} and Jensen, {Pernille Erland} and Ottosen, {Lisbeth M.} and John Barlindhaug",
year = "2018",
doi = "10.1016/j.chemosphere.2018.07.063",
language = "English",
volume = "210",
pages = "683--691",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Pergamon Press",

}

Influence of electrode placement for mobilising and removing metals during electrodialytic remediation of metals from shooting range soil. / Pedersen, Kristine B.; Jensen, Pernille Erland; Ottosen, Lisbeth M.; Barlindhaug, John.

In: Chemosphere, Vol. 210, 2018, p. 683-691.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Influence of electrode placement for mobilising and removing metals during electrodialytic remediation of metals from shooting range soil

AU - Pedersen, Kristine B.

AU - Jensen, Pernille Erland

AU - Ottosen, Lisbeth M.

AU - Barlindhaug, John

PY - 2018

Y1 - 2018

N2 - Electrodialytic remediation was applied to a shooting range soil to investigate the influence of electrode placement on the removal and binding of metals during the treatment. The set-up was based on a 2-compartment cell, in which the cathode was separated from the soil by a cation exchange membrane and the anode was placed directly in the soil, thereby introducing protons and oxygen directly in the soil. Mobilisation of metals from less available fractions (oxidisable and residual) in the soil occurred, due to oxidation/dissolution of insoluble/soluble organic matter and possibly metal oxides in the residual fraction.The transport via electromigration out of the soil and/or re-precipitation in other fractions of the soil (oxidisable, reducible, exchangeable) depended on the metal. More than 30% of the initial content of Mn, Cd, Cu, Pb and Zn and less than 20% of the initial content of Al, Fe, K, Mg, As, Cr and Ni was transported out of the soil. By decreasing the distance between the electrodes from 3.0 to 1.5 cm, the removal of the targeted metal for remediation, Pb, was improved by more than 200%, from 14 to 31%. A similar removal could be achieved in experiments with long distance between electrodes (3.0 cm) by increasing the current intensity from 4 to 10 mA and/or the remediation time from 7 to 35 d. The experiments showed that the design and optimisation of electrodialytic remediation depends on the targeted metal and metal partitioning.

AB - Electrodialytic remediation was applied to a shooting range soil to investigate the influence of electrode placement on the removal and binding of metals during the treatment. The set-up was based on a 2-compartment cell, in which the cathode was separated from the soil by a cation exchange membrane and the anode was placed directly in the soil, thereby introducing protons and oxygen directly in the soil. Mobilisation of metals from less available fractions (oxidisable and residual) in the soil occurred, due to oxidation/dissolution of insoluble/soluble organic matter and possibly metal oxides in the residual fraction.The transport via electromigration out of the soil and/or re-precipitation in other fractions of the soil (oxidisable, reducible, exchangeable) depended on the metal. More than 30% of the initial content of Mn, Cd, Cu, Pb and Zn and less than 20% of the initial content of Al, Fe, K, Mg, As, Cr and Ni was transported out of the soil. By decreasing the distance between the electrodes from 3.0 to 1.5 cm, the removal of the targeted metal for remediation, Pb, was improved by more than 200%, from 14 to 31%. A similar removal could be achieved in experiments with long distance between electrodes (3.0 cm) by increasing the current intensity from 4 to 10 mA and/or the remediation time from 7 to 35 d. The experiments showed that the design and optimisation of electrodialytic remediation depends on the targeted metal and metal partitioning.

KW - Electrokinetic remediation

KW - Heavy metals

KW - Shooting range soil

KW - Metal fractionation

U2 - 10.1016/j.chemosphere.2018.07.063

DO - 10.1016/j.chemosphere.2018.07.063

M3 - Journal article

VL - 210

SP - 683

EP - 691

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -