Cesium and Strontium Specific Exchangers for Nuclear Waste Effluent Remediation

Pore structure and sorption characterization of titanosilicates obtained from concentrated precursors by the sol–gel method

“…Titanosilicates (TiSi) are inorganic compounds widely applied in sorption and ion-exchange processes. [1][2][3][4][5][6][7][8][9][10][11] These chemically and thermally stable and radiation resistant materials with a high ion-exchange rate and remarkable capacity, are able to effectively decontaminate liquid radioactive wastes (LRW) from long-live nuclides, such as 90 Sr, 134,137 Cs, [233][234][235]238 U, 241 Am, 239,240 Pu and 154 Eu. 1,3,12,13 In numerous works, different ways of TiSi synthesis, such as hydrolysis of alkoxides and inorganic salts via hydrothermal, microwave, mechanochemical and solgel routes were proposed.…”

Hydrothermal Synthesis and Structure of Fe(NH3)2PO4: A Novel Monophosphate

“…It was found that the type of compound formed depends on the exquisitely sensitive relationship between the charge, shape, and volume of the cationic template and the nature of the void formed in the anionic framework. [1][2][3][4][5][6][7][8] Iron(III) phosphates have been extensively studied because they find applications in such diverse fields as heterogeneous catalysis, ion exchange or passivation of a metal surface. Several new compounds in the iron(III) phosphate family have been synthesized recently by using hydrothermal methods.…”

Effects of Hydration during Strontium Exchange into Nanoporous Hydrogen Niobium Titanium Silicate

“…One nanoporous heterosilicate in particular, naturally occurring as the mineral sitinakite (HNa 2 KTi 4 Si 2 O 14 ·4H 2 O), is successful in the selective removal Cs + and Sr 2+ ions from aqueous media. − Sitinakite (also known as CST or TS in the literature for crystalline silicotitanate or titanium silicate, respectively) can be found in the mines of northern Russia (Kola Peninsula, Khibiny Massif) where it is a secondary mineral phase in hydrothermal systems . TS has only been synthesized with extraframework Na (Na-TS) and ideally crystallizes in a tetragonal space group, P 4 2 / mcm , and unit cell parameters of a = 7.832 Å and c = 11.945 Å .…”