[2B15-19] Fukushima Daiichi NPT Accident Waste Treatment 8

[2B17] Fabrication and application of titanate nanowires for selective Sr adsorption

*Yuta Morioka¹, Teppei Saito¹, Naoki Asao^1,2, Kenji Tsuji³, Kunihiro Tabata³ (1. Shinshu Univ., 2. Tohoku Univ., 3. Chubu Electric Power)

Keywords:Sodium titanate, Nanowire, Storontium, Adsorbent, Ion-exchange, Granulation, Dealloying-oxidation

For decontamination of the radiation-tainted water in Fukushima, we have reported that the layered sodium titanate nanowires fabricated from titanium alloys under alkaline conditions exhibited remarkable Sr²⁺ adsorption properties. Here we report that the selectivity of Sr²⁺ uptake in the artificial seawater conditions is enhanced by use of Ba²⁺ ions as the intercalated exchangeable ions instead of Na⁺ ions. Furthermore, the nanowires are granulated to give granular adsorbents with around 1 mm size, which show high adsorption performance in the column operation.