Electromigration of carrier-free radionuclide ions in electrolytes. Hydrolysis of Bi(III) in aqueous solution

The electromigration of carrier-free 205,206Bi ions in a constant electric field has been investigated. Results about dependence of bismuth ion mobilities on pH have been obtained at overall ionic strength 0.25 M and temperature 298.1(1) K. Basing on this results hydrolysis constants and individual ion mobilities of bismuthium species have been calculated according to the hydrolysis processes of monomeric bismuthium. A relative high ion mobility of the monovalent bismuthium cation Bi(OH)2+ has been detected. This may be interpreted by the existence of monomeric bismuthyl cation in aqueous solutions