Pillared Montmorillonites: Cesium-Selective Ion-Exchange Materials

Cesium and Strontium Specific Exchangers for Nuclear Waste Effluent Remediation

“…content of Na+ and K+ in the TAN groundwater. The effect of electrolyte concentration on uptake of Cs+ by"" the Al and Zr PILCS had been reported earlier (12). Potassium ion was the most effective followed by Na+ in reducing the exchange of Cs+ however, even in 1M Na+ Kds 10,000nWg.…”

“…The titanium trisilicate is isostructural with the zirconium compound so that its openings to the cavities are somewhat smaller than those of the zirconium phase. (12,13). A simplified schematic showing the pillaring of a clay by alumina is illustrated in Fig.…”

Strontium Adsorption Properties of an Aluminum-Pillared Montmorillonite Carrying Carboxylate Functional Groups

“…[13] Note that ψ PILC is now incorporated in constant although it should normally depend on the ionic concentration of the exchange solution (31 = λ = constant), it can be inferred from Eq. [13] that Q dis → 0 forK λ Q dis → Q tot forK λ. [14] Therefore, with increasing acid strength of the organic species, more groups are driven to dissociation.…”

“…Furthermore, refining on their preparation methods may give rise to materials having the desired ion exchange properties to meet the separation needs. For example, PILCs with increased selectivity for cesium or strontium have been tailored by introducing the adequate pillaring species between the clay lamellae (12,13). In a previous work (14) we faced the challenge of suppressing strontium desorption by an aluminum-pillared montmorillonite in acidic aqueous solutions.…”

Influence of hydrophilicity on adsorption of caffeine onto montmorillonite

“…Such exchangeable cations are also called interlayer ions. Because the interlayer ions can be easily exchanged, Mont has been used as a cation exchange material ( Karamanis and Assimakopoulos, 2007;Sylvester et al, 1999). Furthermore, techniques that impart further functions to Mont by exchanging interlayer ions for a compound having a desired function has been generally used.…”