Etude de L'effet du ver de terre lumbricus terresteris sur La speciation des metaux lourds DU SOL Study of the effect of earthworm lumbricus Terrestris on the Speciation of heavy metals in soils

摘要

Evaluation of the effect of earthworm Lumbricus terrestris on the speciation of copper and cadmium was carried out on two types of soils with a high metallic contamination due to municipal wastes spreading. The concentrations of total dissolved metals were higher in the soil containing earthworms. This increase was larger for the soil submitted to disturbance by earthworms for a long time(3 months). The main chemical species in the lixiviates of all type of soils including controls, were labile forms of cadmium with 52 to 87/100 and stable forms of copper which represents 67 to 95/100 of total concentration of dissolved metal.