A hot HCl-prewashed soil-simulating sand, particle size 0.48-0.63 mm, treated with aq. 0.25-0.47 g/L Cd(NO3)(2) UP to 50, 75 and 100% relative H2O content, was shaped as a 20-cm bed between two graphite electrodes, voltage 26 V, potential gradient 1.3 V/cm, and migration of Cd was studied in relation to relative distance from anode (10 sections) and to time (24 or 48 h). In 4 h. the potential gradient in the near-cathode area rose to 6 V/cm. In 10 h, the current fell from the initial 0.75 to 0.1 mA. After the test, Cd was washed out from sand sections with water, Cd(w), and with HCl, Cd(k). In the near-cathode sections, Cd(k) > Cd(w), a proof for H2O-insoluble Cd compounds. At 50 and 75% H2O, 90% of the bed still contained 80% of the original Cd, regardless of the test time; at 100% H2O in 24 and 48 h, the corresponding Cd percentages were 75 and 60%, resp.