Abstract
Electro-oxidation method was employed for the separation of Ru as RuO4 vapour, from nitrosyl nitrate and simulated high level liquid waste (SHLLW) solutions. Separation of 95 and 54 % Ru were accomplished from RuNO(NO3)3 and SHLLW respectively, in 1 M nitric acid using 20 mA cm−2 as the anodic current density and with 0.02 M Ce as the redox catalyst at 318 K, using an undivided cell. To minimize the deleterious effect of nitrite ions, a divided cell with glass frit as the diaphragm was designed and 75 and 80 % Ru were separated from the nitrosyl nitrate and SHLLW solutions at 313 ± 2 K, in 4 M HNO3 without any catalyst.
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