Uranium-containing aqueous wastes have been treated by electrosorption on a carbon electrode composed of activated carbon fibers(ACFs) in a continuous flow-through cell. Effective uranium (VI) removal is accomplished when a negative potential in the range of -0.3 to -0.9 V (vs. Ag/AgCl) is applied to the carbon electrode. For a feed concentration of 350 mg/l, the concentration of U(VI) in the cell effluent is reduced to less than 1 mg/l. Electrosorption capacity over 552 mguranium/gACF is reached.