TY - JOUR
T1 - Assessment of metal bioavailability in smelter-contaminated soil before and after lime amendment
AU - Bade, Rabindra
AU - Oh, Sanghwa
AU - Sik Shin, Won
PY - 2012/6/1
Y1 - 2012/6/1
N2 - In this study, changes in bioavailable concentrations of Pb, Zn, Cu and As in former smelter site soils (J1 and J2) were investigated before and after lime amendment. The immobilization efficiencies of metal(loid)s were evaluated by Toxicity Characteristic Leaching Procedure (TCLP). Their bioavailable concentrations in the soils were evaluated by the acid-extractable and -reducible fractions in Standard Measurement and Testing Program (i.e., SM&T(I+II)), in vitro physiologically based extraction test (PBET) and diffusive gradients in thin-films (DGT). The results showed that the bioavailable concentrations remarkably decreased after lime amendment in both J1 and J2 soils. DGT uptake and resupply (R) of Zn, Cu and As from soil to soil solution increased but that of Pb decreased. This pattern was consistent with SM&T(I+II)- and PBET-extractable concentrations after lime amendment. This indicates that lime amendment is highly effective for the immobilization of Zn, Cu and As, but not for Pb. Our results implicate that DGT can be used to estimate bioavailability of metal(loid)s in soils and further extended to estimate risk reduction after soil remediation.
AB - In this study, changes in bioavailable concentrations of Pb, Zn, Cu and As in former smelter site soils (J1 and J2) were investigated before and after lime amendment. The immobilization efficiencies of metal(loid)s were evaluated by Toxicity Characteristic Leaching Procedure (TCLP). Their bioavailable concentrations in the soils were evaluated by the acid-extractable and -reducible fractions in Standard Measurement and Testing Program (i.e., SM&T(I+II)), in vitro physiologically based extraction test (PBET) and diffusive gradients in thin-films (DGT). The results showed that the bioavailable concentrations remarkably decreased after lime amendment in both J1 and J2 soils. DGT uptake and resupply (R) of Zn, Cu and As from soil to soil solution increased but that of Pb decreased. This pattern was consistent with SM&T(I+II)- and PBET-extractable concentrations after lime amendment. This indicates that lime amendment is highly effective for the immobilization of Zn, Cu and As, but not for Pb. Our results implicate that DGT can be used to estimate bioavailability of metal(loid)s in soils and further extended to estimate risk reduction after soil remediation.
KW - Bioavailable concentration
KW - Diffusive gradients in thin-films (DGT)
KW - Immobilization
KW - Metal(loid)s
KW - Resupply kinetics
KW - Soil
UR - http://www.scopus.com/inward/record.url?scp=84860527062&partnerID=8YFLogxK
U2 - 10.1016/j.ecoenv.2012.03.019
DO - 10.1016/j.ecoenv.2012.03.019
M3 - Article
C2 - 22498424
AN - SCOPUS:84860527062
SN - 0147-6513
VL - 80
SP - 299
EP - 307
JO - Ecotoxicology and Environmental Safety
JF - Ecotoxicology and Environmental Safety
ER -
