Highly Selective Inorganic Crystalline Ion Exchange Material for Sr²⁺ in Acidic Solutions

Assessment of a Sodium Nonatitanate and Pharmacosiderite-Type Ion Exchangers for Strontium and Cesium Removal from DOE Waste Simulants

“…Although Ca 2+ and Mg 2+ are known intereferences for the selective Sr 2+ absorption, our results indicate that the N-Springs Kd remains significantly high. Traditionally, the sodium nonatitanate has little affinity for Sr 2+ at acidic pH; however, Nenoff and co-workers (11) recently revealed an antimony-substituted titanate, doped with different niobium, vanadium, bismuth, or zirconium oxides, which showed some selectivity for Sr 2+ from acidic solutions.…”

“…We chose inorganic materials because of their high chemical, thermal, and radiation stabilities as compared to conventional organic ion exchange resins. Furthermore, inorganic ion exchangers typically have high capacities and selectivities for a wide variety of monovalent and divalent metal cations ( − ). Another important property is the ability to structurally modify the compounds by altering the synthetic conditions by which the materials are prepared.…”

Cs+ ion exchange over lanthanide silicate Eu-AV-20: Experimental measurement and modelling

“…Concerning the specific removal of radioactive cesium and strontium, many classes of inorganic materials have been proposed: zeolites [19], zeolite-like materials [2,11,[20][21][22][23][24][25], titanates [26,27], zirconium phosphates [28,29], phyllosilicates [30][31][32] and pillared clays [33]. Among zeolite-like sorbents, microporous mixed octahedral-pentahedral-tetrahedral (OPT) materials offer great opportunities for selective ion exchangers.…”

Novel Zinc Phosphate Phases Formed with Chiral d-Glucosamine Molecules

“…[14][15][16] Amine molecules have been effective in templating zinc phosphates due to the readily available H-bonding between the nitrogen of the amine and the "dangling" hydroxide of terminal phosphate groups found on the walls of a pore. 17,18 The inherent need for an enantioselective framework, and our past experiences with nonaluminosilicate molecular sieves, [19][20][21] led us to study the zinc phosphate system. We have explored the transfer of size, shape, and chirality of our templating molecule to the crystalline zinc phosphate system.…”

“…We have employed the knowledge and successes of recent work − by templating an inorganic structure with organic molecules. Zeolitic-type structures with chiral tetrahedral framework topologies have previously been synthesized. − Furthermore, chiral organometallic templates have been used to synthesize zeolitic and layered frameworks. − Amine molecules have been effective in templating zinc phosphates due to the readily available H-bonding between the nitrogen of the amine and the “dangling” hydroxide of terminal phosphate groups found on the walls of a pore. , The inherent need for an enantioselective framework, and our past experiences with nonaluminosilicate molecular sieves, − led us to study the zinc phosphate system. We have explored the transfer of size, shape, and chirality of our templating molecule to the crystalline zinc phosphate system.…”