English Abstract Soil contaminated with cadmium was cleaned up in-situ
by a HCl extraction technique. The clean-up method reduced the cadmium
concentration below A-value. To study ecological risks bioassays were
performed with an earthworm (Eisenia andrei) and lettuce (Lactuca sativa) in
cleaned up soil as well as in contaminated soil. Both organisms were not
able to survive in these soils, unless they were mixed with 25-75%
quartzsand. Plants and worms were grown for 28 days. At the start and at
the end of the experiments soils, plants and worms were analysed for
cadmium. It appeared that the clean up method increased the bioavailability
of the cadmium.
