Development of Pd separation technique based on photoreduction and precipitation; The Relationship between ethanol concentration and Pd recovery

Yomogida, Takumi   ; Asai, Shiho; Saeki, Morihisa*; Hanzawa, Yukiko  ; Horita, Takuma ; Esaka, Fumitaka  ; Oba, Hironori*  ; Kitatsuji, Yoshihiro  

Recently, we developed a precipitation-based separation method for the determination of Pd with ICP-MS. However, a pulsed-laser light source is indispensable to form Pd precipitation in the separation method. There were difficulties in handling of a pulsed-laser light source. Simplified irradiation procedure is desirable to facilitate a Pd separation procedure. In this study, we developed a simple Pd separation technique based on photoreduction with Xe lamp irradiation and applied the technique to a simulated HLW solution. The Pd recovery from a simulated HLW solution reached 50%, while 99% of the other 13 elements were removed. These results indicate that selective separation of Pd is achieved with the simplified irradiation procedure.