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Effect of leaching and aging on the bioavailability of lead to the springtail Folsomia candida
Author(s) -
Lock Koen,
Waegeneers Nadia,
Smolders Erik,
Criel Peggy,
Van Eeckhout Hilde,
Janssen Colin R.
Publication year - 2006
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/05-612r.1
Subject(s) - springtail , soil water , bioavailability , environmental chemistry , leaching (pedology) , ecotoxicology , chemistry , transect , bioconcentration , toxicity , biosolids , dry weight , metal toxicity , soil contamination , biology , bioaccumulation , botany , ecology , environmental science , heavy metals , environmental engineering , organic chemistry , bioinformatics
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.