Granular Barium Titanate Nanowire-Based Adsorbents for the Removal of Strontium Ions from Contaminated Water

Highly selective uptake of Sr 2+ was achieved by the use of granulated barium titanate nanowires as a designed practical adsorbent, which is desirable for use in decontamination like at Fukushima. The adsorbents were produced by the fabrication of sodium titanate nanowires through the dealloying of TiZn 16 in a NaOH aqueous solution at room temperature, granulation followed by calcination, and ion exchange with BaCl 2 . Furthermore, the uptake of Sr 2+ proceeds with the suppression of elution of the exchanged Ba 2+ by the formation of barium salt particles with sulfate ions contained in seawater.