Abstract
| Original language | English |
|---|---|
| Journal | Journal of Hazardous Materials |
| Volume | 358 |
| Pages (from-to) | 459-466 |
| Number of pages | 8 |
| ISSN | 0304-3894 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- Electrokinetics
- Minerals
- Pb
- Soil
- Weathering
Cite this
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Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering. / Skibsted, Gry; Ottosen, Lisbeth M.; Elektorowicz, Maria; Jensen, Pernille Erland.
In: Journal of Hazardous Materials, Vol. 358, 2018, p. 459-466.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Effect of long-term electrodialytic soil remediation on Pb removal and soil weathering
AU - Skibsted, Gry
AU - Ottosen, Lisbeth M.
AU - Elektorowicz, Maria
AU - Jensen, Pernille Erland
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
KW - Electrokinetics
KW - Minerals
KW - Pb
KW - Soil
KW - Weathering
U2 - 10.1016/j.jhazmat.2018.05.033
DO - 10.1016/j.jhazmat.2018.05.033
M3 - Journal article
VL - 358
SP - 459
EP - 466
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
ER -