Electrodeposition of Tc99 from Aqueous Solution

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Abstract
A study has been made to determine the optimum conditions necessary for the electrodeposition of macro amounts of technetium (Tc99) from an aqueous bath containing about 0.018 mole of and 1 mole of per liter of solution with added to pH about 1. Electrolysis of this solution at 1 to 2 amp/dm2and room temperature gives a bright, metallic appearing deposit of Tc with a cathode current efficiency of up to 30%. Included in this study are the effects on CCE of such factors as current density, bath pH, concentrations of the various reagents, temperature, and the colored cathode reduction product. Tests made to determine the nature of the deposit showed it to be essentially metallic; however, annealing is necessary to produce metallic crystals. During electrolysis a light pink reduction product forms in the bath; as electrolysis continues this reduction product becomes darker and appears to poison the bath. Addition of small amounts of to the bath during electrolysis can prevent the colored reduction products from forming.

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