The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings
Repparfjorden in northern Norway has been partly designated for submarine mine tailings disposal when the adjacent Cu mine re-opens in 2019. In order to increase sedimentation, the flocculant, Magnafloc10 is planned to be added to the mine tailings prior to discharge into the fjord. This study inves...
Published in: | Journal of Environmental Management |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://orbit.dtu.dk/en/publications/72ca2c4f-0ed3-4b27-addd-92f5def33cda https://doi.org/10.1016/j.jenvman.2018.07.050 |
id |
ftdtupubl:oai:pure.atira.dk:publications/72ca2c4f-0ed3-4b27-addd-92f5def33cda |
---|---|
record_format |
openpolar |
spelling |
ftdtupubl:oai:pure.atira.dk:publications/72ca2c4f-0ed3-4b27-addd-92f5def33cda 2023-11-12T04:23:18+01:00 The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings Pedersen, Kristine B. Reinardy, Helena C. Jensen, Pernille Erland Ottosen, Lisbeth M. Junttila, Juho Frantzen, Marianne 2018 https://orbit.dtu.dk/en/publications/72ca2c4f-0ed3-4b27-addd-92f5def33cda https://doi.org/10.1016/j.jenvman.2018.07.050 eng eng info:eu-repo/semantics/closedAccess Pedersen , K B , Reinardy , H C , Jensen , P E , Ottosen , L M , Junttila , J & Frantzen , M 2018 , ' The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings ' , Journal of Environmental Management , vol. 224 , pp. 130-139 . https://doi.org/10.1016/j.jenvman.2018.07.050 Electrokinetic remediation Copper Magnafloc10 Sequential extraction Metal extraction Mine tailings /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy article 2018 ftdtupubl https://doi.org/10.1016/j.jenvman.2018.07.050 2023-10-18T22:58:15Z Repparfjorden in northern Norway has been partly designated for submarine mine tailings disposal when the adjacent Cu mine re-opens in 2019. In order to increase sedimentation, the flocculant, Magnafloc10 is planned to be added to the mine tailings prior to discharge into the fjord. This study investigated the feasibility of reducing the Cu concentrations (375 mg/kg) in the mine tailings by applying electrodialytic extraction, including potential optimisation by adding Magnafloc10. In the acidic electrodialytic treatment (pH < 2), Magnafloc10 increased the extraction of Cu from the mine tailings particles from 76 to 86%, and the flocs with adsorbed metals were separated from the tailings solids by the electric field (1 mA/cm 2 ). The electric energy consumption increased with the use of Magnafloc10 (from 17 to 30 kWh/g Cu extracted), due to lower conductivity in the liquid phase and clogging of the membrane by the flocs. In the alkaline electrodialytic treatment (pH > 12), Magnafloc10 reduced the extraction of Cu from 17% to 0.7%, due to the flocs remaining in the tailing slurries. The electric energy consumption per extracted Cu was similar in the acidic and alkaline electrodialytic treatments without the addition of Magnafloc10. In the alkaline electrodialytic treatment, the extraction of other metals was low (<2%), however longer treatment time is necessary to achieve similar Cu extraction as in the acidic electrodialysis. Depending on the target and timescale for treatment, acidic and alkaline electrodialysis can be employed to reduce the Cu concentration in the mine tailings thereby reducing the metal toxicity potential. Article in Journal/Newspaper Northern Norway Technical University of Denmark: DTU Orbit Norway Repparfjorden ENVELOPE(24.197,24.197,70.494,70.494) Journal of Environmental Management 224 130 139 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Electrokinetic remediation Copper Magnafloc10 Sequential extraction Metal extraction Mine tailings /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy |
spellingShingle |
Electrokinetic remediation Copper Magnafloc10 Sequential extraction Metal extraction Mine tailings /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy Pedersen, Kristine B. Reinardy, Helena C. Jensen, Pernille Erland Ottosen, Lisbeth M. Junttila, Juho Frantzen, Marianne The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
topic_facet |
Electrokinetic remediation Copper Magnafloc10 Sequential extraction Metal extraction Mine tailings /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy |
description |
Repparfjorden in northern Norway has been partly designated for submarine mine tailings disposal when the adjacent Cu mine re-opens in 2019. In order to increase sedimentation, the flocculant, Magnafloc10 is planned to be added to the mine tailings prior to discharge into the fjord. This study investigated the feasibility of reducing the Cu concentrations (375 mg/kg) in the mine tailings by applying electrodialytic extraction, including potential optimisation by adding Magnafloc10. In the acidic electrodialytic treatment (pH < 2), Magnafloc10 increased the extraction of Cu from the mine tailings particles from 76 to 86%, and the flocs with adsorbed metals were separated from the tailings solids by the electric field (1 mA/cm 2 ). The electric energy consumption increased with the use of Magnafloc10 (from 17 to 30 kWh/g Cu extracted), due to lower conductivity in the liquid phase and clogging of the membrane by the flocs. In the alkaline electrodialytic treatment (pH > 12), Magnafloc10 reduced the extraction of Cu from 17% to 0.7%, due to the flocs remaining in the tailing slurries. The electric energy consumption per extracted Cu was similar in the acidic and alkaline electrodialytic treatments without the addition of Magnafloc10. In the alkaline electrodialytic treatment, the extraction of other metals was low (<2%), however longer treatment time is necessary to achieve similar Cu extraction as in the acidic electrodialysis. Depending on the target and timescale for treatment, acidic and alkaline electrodialysis can be employed to reduce the Cu concentration in the mine tailings thereby reducing the metal toxicity potential. |
format |
Article in Journal/Newspaper |
author |
Pedersen, Kristine B. Reinardy, Helena C. Jensen, Pernille Erland Ottosen, Lisbeth M. Junttila, Juho Frantzen, Marianne |
author_facet |
Pedersen, Kristine B. Reinardy, Helena C. Jensen, Pernille Erland Ottosen, Lisbeth M. Junttila, Juho Frantzen, Marianne |
author_sort |
Pedersen, Kristine B. |
title |
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
title_short |
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
title_full |
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
title_fullStr |
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
title_full_unstemmed |
The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
title_sort |
influence of magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings |
publishDate |
2018 |
url |
https://orbit.dtu.dk/en/publications/72ca2c4f-0ed3-4b27-addd-92f5def33cda https://doi.org/10.1016/j.jenvman.2018.07.050 |
long_lat |
ENVELOPE(24.197,24.197,70.494,70.494) |
geographic |
Norway Repparfjorden |
geographic_facet |
Norway Repparfjorden |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
Pedersen , K B , Reinardy , H C , Jensen , P E , Ottosen , L M , Junttila , J & Frantzen , M 2018 , ' The influence of Magnafloc10 on the acidic, alkaline, and electrodialytic desorption of metals from mine tailings ' , Journal of Environmental Management , vol. 224 , pp. 130-139 . https://doi.org/10.1016/j.jenvman.2018.07.050 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.jenvman.2018.07.050 |
container_title |
Journal of Environmental Management |
container_volume |
224 |
container_start_page |
130 |
op_container_end_page |
139 |
_version_ |
1782338123760402432 |