Am(III) sorption onto TiO2 samples with different crystallinity and varying pore size distributions

Sorption of Eu (III) onto Nano-Sized H-Titanates of Different Structures

“…A pronounced rise of Eu (III) sorption from 0 to 100% is observed within pH values 2-4. The typical pH range of the trivalent metal cations sorption edge on different oxide surfaces is within 2-6 [3,[30][31][32]. Thus, H-titanates demonstrate very strong binding with Eu (III).…”

“…The high values of the trivalent f-elements (lanthanides and actinides) removal (Figures 2 and 3) can be usually explained by their high tendency to sorb onto different mineral surfaces and by formation of strong inner-sphere complexes with different surface hydroxyl groups (e.g., ≡Ti-OH) [3,33]. The spectroscopic studies and quantum-chemical calculations are ongoing to determine the sorbed complexes of Eu (III) onto H-titanates.…”

“…Americium and curium present only in trivalent form under environmental conditions and their chemical behavior is very close to lanthanides, particularly Eu (III). Different techniques of An (III)/Ln (III) extraction from water solutions have been developed using inorganic sorbents [2][3][4][5][6][7][8][9][10][11], organic/polymer sorbents [12][13][14][15], and different types of chromatography [16][17][18]. Recently nanosized Na, H-titanates attracted attention due to their properties.…”

Titanium Oxide Microspheres with Tunable Size and Phase Composition

“…Spherical particles provide high scattering, which is important for the soft focus effect [13]. In contrast to cosmetic applications, such applications as water purification require high photocatalytic activity [14,15,16,17,18]. Particles for chromatography and radionuclide treatment are expected to have spherical shape [19] and narrow pore size distribution in order to minimize flow resistance.…”

“…Due to the pressure limitations under HPLC conditions, the size of the sorbent should be of micrometer scale. Apart from these factors, it is optimal to use particles that have a pore size of 5–50 nm, and consist of crystalline phases to ensure the required adsorption capacity and chemical stability, and TiO 2 microspheres have shown good results in sorption applications [15,20]. For solar cells applications, a high degree of crystallinity is important to avoid the recombination of photo-generated charge carriers.…”