Hydration states of europium(III) adsorbed on silicas with nano-sized pores

Characterizing the Behavior of Water Interacting with a Nano‐Pore Material: A Structural Investigation in Native Environment Using Magnetic Resonance Approaches

“…In geochemistry, the interconnectivity of pores could influence the rate of weathering rind formation in a transport and diffusion‐controlled regime [2] . Pore structure also fundamentally affects the hydration state and adsorption of europium ions (Eu 3+ ), critical for assessing the migration of heavy metal ions into groundwater through rock fractures featuring nano pores [3–4] . The difference in water diffusion, especially resulting from geometric effects such as porosity, curvature, and pore size, also profoundly affects the catalytic activity (e. g., enantioselectivity [5] and entropic barriers [6] ) of mesoporous materials [7] .…”

“…[2] Pore structure also fundamentally affects the hydration state and adsorption of europium ions (Eu 3 + ), critical for assessing the migration of heavy metal ions into groundwater through rock fractures featuring nano pores. [3][4] The difference in water diffusion, especially resulting from geometric effects such as porosity, curvature, and pore size, also profoundly affects the catalytic activity (e. g., enantioselectivity [5] and entropic barriers [6] ) of mesoporous materials. [7] In the energy sector, a crucial material, Nafion, widely used in fuel cells, electrochemical devices, water electrolysis, and batteries, has been extensively studied recently.…”

Adsorption of cesium and strontium on mesoporous silicas

“…28 The amount of trivalent europium ions adsorbed per unit surface area on silica did not differ significantly depending on the presence or absence of small pores, but the hydration state of the adsorbed ions differed. 29 Furthermore, a few studies have compared adsorption reactions in small spaces among different ions. Weakly hydrated monovalent ions were strongly adsorbed on zeolites with dehydration, especially those with pores smaller than the hydrated ions, 30,31 which was confirmed by calorimetric analysis and nuclear magnetic resonance analysis.…”

“…28 The amount of trivalent europium ions adsorbed per unit surface area on silica did not differ significantly depending on the presence or absence of small pores, but the hydration state of the adsorbed ions differed. 29…”