Solid phase extraction of europium and uranium using Tulsion CH-90 resin

Sorption behaviour of nanocrystalline MOR type zeolite for Th(IV) and Eu(III) removal from aqueous waste by batch treatment

“…According to adsorption theory, adsorption decreases with rise in temperature, and molecules adsorbed earlier on a surface tend to desorb from the sorbent surface at elevated temperature. But for activated carbon, inorganic and organic ion exchangers, different results are noticed [42][43][44] where decreasing viscosity and increasing molecular motion at higher temperature allow the uptake of molecules into the pores more easily causing adsorption to increase as the temperature increases. Therefore, system temperature can be considered as a crucial parameter in sorption reaction.…”

Preparation and adsorption performance of 5-azacytosine-functionalized hydrothermal carbon for selective solid-phase extraction of uranium

“…Among common SPE adsorbents used nowadays for separation of metal ions such as carbonaceous adsorbents [8][9][10], other inorganic adsorbents [11,12], polymeric adsorbents [13,14], biosorbents [15,16] and composite adsorbents [17][18][19], the composite adsorbents that consist specifically of a carrier matrix and functional ligands possess essentially a higher selectivity and capacity toward target metal ions over the others. The superiority in metal selectivity mediated by specific metal-ligand interactions based on its chosen building blocks makes the particular kind of adsorbent more practical and economical [19,20].…”

Thermodynamics and Kinetics of Heavy Metals Adsorption on Silica Particles Chemically Modified by Conjugated β-Ketoenol Furan

“…19 An important trend in the development of adsorbent is changing the traditional supports by physical or chemical treatments to produce new and more versatile materials with low-priced and well-defined characteristics. 20,21 Different solid phases have been applied in SPE, such as active carbon, 22 silica particles, 23 microcrystalline naphthalene, 24 Amberlite XAD resin, 25 polyurethane foam, 26 and alumina. 27 Nevertheless, silica particles have gained importance in the SPE technique because of their high porosity, good mechanical and thermal stability, lower susceptibility to swelling and shrinking, and their easiness of surface modification.…”

“…Indeed, the key point is to choose a suitable adsorbent for desired selectivity and sensitivity . An important trend in the development of adsorbent is changing the traditional supports by physical or chemical treatments to produce new and more versatile materials with low-priced and well-defined characteristics. , …”