Electrodialytic remediation of copper mine tailings

Henrik K. Hansen, A. Rojo, Lisbeth M. Ottpsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Mining activities in Chile have generated large amounts of solid waste, which have been deposited in mine tailing impoundments. These impoundments cause concern to the communities due to dam failures or natural leaching to groundwater and rivers.This work shows the laboratory results of nine electrodialytic remediation experiments on copper mine tailings. The results show that electric current could remove copper from watery tailing if the potential gradient was higher than 2V/cm during 21 days. With addition of sulphuric acid, the process was enhanced because the pH decreased to around 4, and the copper by this reason was released in the solution. Furthermore, with acidic tailing the potential gradient was less than 2V/cm.The maximum copper removal reached in the anode side was 53% with addition of sulphuric acid in 21 days experiment at 20V using approximately 1.8kg mine tailing on dry basis. In addition, experiments with acidic tailing show that the copper removal is proportional with time.
Original languageEnglish
JournalJournal of Hazardous Materials
Volume117
Issue number2-3
Pages (from-to)179-183
ISSN0304-3894
DOIs
Publication statusPublished - 2005

Keywords

  • Copper removal
  • Ton exchange membranes
  • Electrodialysis
  • Mine tailing impoundments
  • Electric field

Cite this

Hansen, Henrik K. ; Rojo, A. ; Ottpsen, Lisbeth M. / Electrodialytic remediation of copper mine tailings. In: Journal of Hazardous Materials. 2005 ; Vol. 117, No. 2-3. pp. 179-183.
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Electrodialytic remediation of copper mine tailings. / Hansen, Henrik K.; Rojo, A.; Ottpsen, Lisbeth M.

In: Journal of Hazardous Materials, Vol. 117, No. 2-3, 2005, p. 179-183.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Electrodialytic remediation of copper mine tailings

AU - Hansen, Henrik K.

AU - Rojo, A.

AU - Ottpsen, Lisbeth M.

PY - 2005

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N2 - Mining activities in Chile have generated large amounts of solid waste, which have been deposited in mine tailing impoundments. These impoundments cause concern to the communities due to dam failures or natural leaching to groundwater and rivers.This work shows the laboratory results of nine electrodialytic remediation experiments on copper mine tailings. The results show that electric current could remove copper from watery tailing if the potential gradient was higher than 2V/cm during 21 days. With addition of sulphuric acid, the process was enhanced because the pH decreased to around 4, and the copper by this reason was released in the solution. Furthermore, with acidic tailing the potential gradient was less than 2V/cm.The maximum copper removal reached in the anode side was 53% with addition of sulphuric acid in 21 days experiment at 20V using approximately 1.8kg mine tailing on dry basis. In addition, experiments with acidic tailing show that the copper removal is proportional with time.

AB - Mining activities in Chile have generated large amounts of solid waste, which have been deposited in mine tailing impoundments. These impoundments cause concern to the communities due to dam failures or natural leaching to groundwater and rivers.This work shows the laboratory results of nine electrodialytic remediation experiments on copper mine tailings. The results show that electric current could remove copper from watery tailing if the potential gradient was higher than 2V/cm during 21 days. With addition of sulphuric acid, the process was enhanced because the pH decreased to around 4, and the copper by this reason was released in the solution. Furthermore, with acidic tailing the potential gradient was less than 2V/cm.The maximum copper removal reached in the anode side was 53% with addition of sulphuric acid in 21 days experiment at 20V using approximately 1.8kg mine tailing on dry basis. In addition, experiments with acidic tailing show that the copper removal is proportional with time.

KW - Copper removal

KW - Ton exchange membranes

KW - Electrodialysis

KW - Mine tailing impoundments

KW - Electric field

U2 - 10.1016/j.jhazmat.2004.09.014

DO - 10.1016/j.jhazmat.2004.09.014

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JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

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