The adsorption of bismuth(III) on hydrous lead dioxide (HLD) from solutions of the bismuth(III)-EDTA complex was studied by differential pulse polarography. It was found that HLD collected bismuth quantitatively from bismuth-EDTA solution over the pH range from 1 to 12, with shaking for 1 hr, even at bismuth-EDTA concentrations as low as 10(-8)-10(-7)M. In addition, the reaction of HLD with EDTA was investigated in order to consider the participation of EDTA with respect to the adsorption behaviour of bismuth. It can be assumed that the adsorption of bismuth on HLD from bismuth-EDTA solution is correlated to the adsorptive property of HLD and to the surface redox process between HLD and EDTA.