Electrochemical behavior on Ho and Bi ion in LiCl-KCl Eutectic Salt Using W Electrode

We have introduced the PyroRedSox process concept using Liquid Bi for additional recovery of residual actinides. PyroGreen's main step of PyroRedSox process is a two-step process that involves electrochemical and chemical separation processes. First, electrolytic reduction is using Liquid Metal Bi to recover both actinide and lanthanide to Liquid Metal Bi. Second, selective oxidation is a process of separating and extracting Ln using an oxidizing agent (Bi ions or BiCl₃) from liquid Bi to salt. It is well known that lanthanides and residual actinides reduced to liquid metal through electrochemical reductive extraction process form liquid metal and intermetallic compound. In particular, it is necessary to study the effect of liquid metal ions on the reduction of lanthanide and residual actinide ions in an electrochemical reductive extraction process when the liquid metal is oxidized and is present in the molten salt as an ion. This phenomenon is presumed to occur also in electrochemical reductive extraction process, which is the first step of the PyroRedSox process. In order to investigate this phenomenon, Holmium element was selected from lanthanide group and electrochemical reduction behavior was studied in the presence of Bi ion. This study, electrolytic behavior of Holmium and Ho-Bi ion system was studied. The electrochemical behavior of Ho was studied in LiCl-KCl-HoCl₃ molten salts using electrochemical techniques Cyclic Voltammetry on tungsten electrodes at 773K. And during the process of CV, intermetallic compounds were observed as Bi-Tm due to the influence of Bi ions.