TY - JOUR
T1 - Effect of leaching and aging on the bioavailability of lead to the springtail Folsomia candida
AU - Lock, Koen
AU - Waegeneers, N
AU - Smolders, E
AU - Criel, P
AU - Van Eeckhout, Hilde
AU - Janssen, C. R
N1 - Publication Authorstring : Lock, K.; Waegeneers, N.; Smolders, E.; Criel, P.; Van Eeckhout, H.; Janssen, C.R.
Publication RefStringPartII : <i>Environmental Toxicology and Chemistry 25(8)</i>: 2006-2010
PY - 2006
Y1 - 2006
N2 - Because it is unclear if leaching can account for differences in metal bioavailability observed between metal-spiked soils and historically contaminated field soils, we simultaneously assessed Pb toxicity to the springtail Folsomia candida in three transects of Pb-contaminated soils and in leached and unleached soils spiked at similar total Pb concentrations. Total Pb concentrations of 3,877 mg/kg dry weight and higher always caused significant effects on F. candida reproduction in the spiked soils. In the transects, only the soil with the highest Pb concentration of 14,436 mg/kg dry weight significantly affected reproduction. When expressed as pore-water concentrations, reproduction was never significantly affected at Pb concentrations of 0.539 mg/L, whereas reproduction was always significantly affected at Pb concentrations of 0.678 mg/L and higher, independent of the soil treatment. These results indicate that pore-water Pb concentrations can explain, at least in part, the observed differences in the toxicity data expressed as total Pb concentrations. Leaching after the spiking procedure only caused small differences in Pb toxicity and, therefore, cannot account for toxicity differences between laboratory-spiked soils and historically contaminated field soils.
AB - Because it is unclear if leaching can account for differences in metal bioavailability observed between metal-spiked soils and historically contaminated field soils, we simultaneously assessed Pb toxicity to the springtail Folsomia candida in three transects of Pb-contaminated soils and in leached and unleached soils spiked at similar total Pb concentrations. Total Pb concentrations of 3,877 mg/kg dry weight and higher always caused significant effects on F. candida reproduction in the spiked soils. In the transects, only the soil with the highest Pb concentration of 14,436 mg/kg dry weight significantly affected reproduction. When expressed as pore-water concentrations, reproduction was never significantly affected at Pb concentrations of 0.539 mg/L, whereas reproduction was always significantly affected at Pb concentrations of 0.678 mg/L and higher, independent of the soil treatment. These results indicate that pore-water Pb concentrations can explain, at least in part, the observed differences in the toxicity data expressed as total Pb concentrations. Leaching after the spiking procedure only caused small differences in Pb toxicity and, therefore, cannot account for toxicity differences between laboratory-spiked soils and historically contaminated field soils.
U2 - 10.1897/05-612R.1
DO - 10.1897/05-612R.1
M3 - A1: Web of Science-article
VL - 25
SP - 2006
EP - 2010
JO - Environmental Toxicology and Chemistry
JF - Environmental Toxicology and Chemistry
SN - 0730-7268
IS - 8
ER -