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Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering


Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering

Skibsted, Gry, Ottosen, Lisbeth M., Elektorowicz, Maria and Jensen, Pernille E. (2018) Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering. Journal of Hazardous Materials . ISSN 03043894 (In Press)

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Official URL: http://dx.doi.org/10.1016/j.jhazmat.2018.05.033


Weathering of soil minerals during long-term electrochemical soil remediation was evaluated for two different soils: an industrially Pb contaminated soil with high carbonate content and an unpolluted soil with low carbonate content. A constant current of 5 mA was applied for 842 days, and sampling was made 22 times during the treatment. The overall qualitative mineral composition was unaffected by electrodialysis, except for calcite removal which was complete. However, dissolution and removal of Al, Fe, Si, Mg, Ca and Pb from the soil during the treatment exceeded the fraction extractable by digestion in 7 M HNO3, and provided evidence of enhanced mineral dissolution induced by the current. Nevertheless, the total dissolved Si and Al only constituted 0.2-0.3 % and 1.1-3.5 % of the total content, while the Pb overall removal from the contaminated soil was only 8.1 %. An observed reduction in the dry matter of 4.5 % and 13.5 % from the two soils, respectively was mainly due to dissolution of CaCO3 and organic matter, but also included a minor dissolution of other soil minerals.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Building, Civil and Environmental Engineering
Item Type:Article
Authors:Skibsted, Gry and Ottosen, Lisbeth M. and Elektorowicz, Maria and Jensen, Pernille E.
Journal or Publication:Journal of Hazardous Materials
Date:17 May 2018
  • The Danish Agency for Science Technology and Innovation
Digital Object Identifier (DOI):10.1016/j.jhazmat.2018.05.033
Keywords:Minerals; Soil; Weathering; Pb; Electrokinetics
ID Code:983895
Deposited On:28 May 2018 14:34
Last Modified:28 May 2018 14:34


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