Study on Electrolytic Reduction of Pertechnetate in Nitric Acid Solution for Electrolytic Extraction of Rare Metals for Future Reprocessing

Abstract

ver electrode (SSE, Ag/AgCl in 3 M KCl) was used as a reference electrode. All of these electrodes were dipped in an electrolyte solution. The electrolyte solution was prepared from the Tc stock solution described above by adding aqueous solution of HNO3 with desired concentration. Aqueous solution of Pd(NO3)2 was also added to the electrolyte if necessary. The concentration of Tc and Pd in the electrolyte solution was determined by ICP-AES. Photo-absorption spectra of the Tc (only) solutions were measured during electrolysis. The electrolysis was tentatively stopped after prescribed time and a part of an electrolyte solution (2 mL) was transferred to a 1 cm quartz cell. The spectrum of the solution was measured with a Shimadzu U4100 spectrophotometer. 3. Results and Discussion