The bioaccumulation of Molybdenum in the earthworm Eisenia andrei: Influence of soil properties and ageing

► Mo bioaccumulation in the earthworm Eisenia andrei was determined in ten freshly spiked and three aged soils; ► Bioaccumulation factors (BAF) were not affected by soil concentration, suggesting that earthworms are not capable of regulating their internal Mo concentrations; ► BAF was best predicted by ammonium oxalate-extractable iron (Feox) and phosphor (Pox) contents of the soils.