Uptake and elimination of cadmium and zinc by Eisenia andrei during exposure to low concentrations in artificial soil

Archives of Environmental Contamination and Toxicology
Ben A SmithGladys L Stephenson

Abstract

Bioaccumulation factors (BAFs) are often used in the risk assessment process to estimate trophic transfer of contaminants such as metals from soil. BAFs can be derived from laboratory studies through the determination of steady-state concentrations or kinetic estimation methods. In this study, bioaccumulation tests were performed with artificial soil spiked at low levels with cadmium or zinc to determine uptake and elimination kinetics of both metals by the compost worm Eisenia andrei. The metal-amended soils were acclimated for 21 days prior to the test, after which worms were individually incubated in the soils. The uptake phase comprised 0-21 days, after which the test organisms were transferred into clean soil and the elimination phase continued for an additional 21 days. Subsamples of soil and earthworms (whole body) were collected from independent replicates throughout the uptake phase and elimination phase and analyzed for total metal concentrations. Uptake of Cd in E. andrei increased linearly with time and did not reach steady state within the testing period. Cd uptake and excretion were described by a one-compartment first-order kinetics model. Zn concentrations rapidly increased in E. andrei after 1 day of exposure b...Continue Reading

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Citations

May 20, 2011·Archives of Environmental Contamination and Toxicology·Ben A SmithGladys L Stephenson
Jul 22, 2014·Environmental Pollution·Masoud M ArdestaniCornelis A M van Gestel
Jun 12, 2013·Environmental Pollution·Masoud M Ardestani, Cornelis A M van Gestel
Dec 24, 2013·Environmental Pollution·Susana I L GomesMónica J B Amorim
Sep 2, 2016·Environmental Science and Pollution Research International·Emmanuel Nkosinathi Cele, Mark Maboeta
Jan 24, 2021·Ecotoxicology and Environmental Safety·María Dolores FernándezConcepción García-Gómez

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