[3E06-09] Nuclide Separation 2

[3E09] Recovery of platinum group elements using metal-organic nanospace materials:

(IV) Highly selective uptake performance of palladium ions among platinum group elements using copper hexacyanoferrate films

*Junya Murakami¹, Masato Nakaya¹, Jun Onoe¹ (1. Nagoya Univ.)

Keywords:Metal-organic nanospace materials, Prussian blue analogues, platinum-group elements, Electrochemistry, redox states, selective uptake performance

Platinum group metals (PGMs) and molybdenum (Mo) contained in high-level radioactive liquid waste cause serious problems in the vitrification process (joule heating failure, glass flowability deterioration, and clogging). We have found that Prussian blue (PB) and its analogues (PBA) exhibit higher uptake performances for PGMs and Mo than other sorbents (activated carbon and zeolite). However, we also found that it takes a long time, about one month, to achieve sorption equilibrium. In this talk, we will show the uptake properties of copper hexacyanoferrate (CuHCF) film in the solution containing Pd, Ru, and Rh ions, and demonstrate that the Pd ions are highly selective sorbed into CuHCF film and effectively done by controlling the redox states of CuHCF.