TY - JOUR
T1 - Removal of Cu, Pb and Zn in an applied electric field in calcareous and non-calcareous soils
AU - Ottosen, L. M.
AU - Hansen, H. K.
AU - Ribeiro, Alexandra B.
AU - Villumsen, A.
PY - 2001/8/17
Y1 - 2001/8/17
N2 - The pH dependency of the removal of Cu, Zn and Pb by electrodialytic soil remediation from different industrially polluted soils was examined. From 18 experiments performed with five different soils, it was found that the order of mobilization due to a pH decrease was Zn > Cu > Pb . It was found, too, that each of the elements was removed at higher soil pH in calcareous soils (about 12% carbonates) than in soils with a carbonate content of less than 3.7%. In soils rich in carbonates, precipitation of heavy metal carbonates is an important retention mechanism and the heavy metal carbonates are dissolved at higher pH values than the pH at which heavy metals are desorbed in non-calcareous soils. Thus, the relation between the soil pH and the mobility of the heavy metal in the electric field is not only dependent on the heavy metal in focus, but also on the fraction of the heavy metal precipitated as carbonates.
AB - The pH dependency of the removal of Cu, Zn and Pb by electrodialytic soil remediation from different industrially polluted soils was examined. From 18 experiments performed with five different soils, it was found that the order of mobilization due to a pH decrease was Zn > Cu > Pb . It was found, too, that each of the elements was removed at higher soil pH in calcareous soils (about 12% carbonates) than in soils with a carbonate content of less than 3.7%. In soils rich in carbonates, precipitation of heavy metal carbonates is an important retention mechanism and the heavy metal carbonates are dissolved at higher pH values than the pH at which heavy metals are desorbed in non-calcareous soils. Thus, the relation between the soil pH and the mobility of the heavy metal in the electric field is not only dependent on the heavy metal in focus, but also on the fraction of the heavy metal precipitated as carbonates.
KW - Carbonates
KW - Electrodialytic soil remediation
KW - Electrokinetics
KW - Heavy metals
KW - Soil pH
UR - http://www.scopus.com/inward/record.url?scp=0035903041&partnerID=8YFLogxK
U2 - 10.1016/S0304-3894(01)00231-X
DO - 10.1016/S0304-3894(01)00231-X
M3 - Article
C2 - 11489529
AN - SCOPUS:0035903041
SN - 0304-3894
VL - 85
SP - 291
EP - 299
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 3
ER -