The adsorption behavior of cesium on silica gel

Synthesis, characterization, and sorption properties of silica gel-immobilized Schiff base derivative

“…The sorption studies were obtained by using the batch method [19,20], where a series of samples of 25.0 mg of the modified silica were suspended in 10.0 cm 3 of aqueous solution with cations at several concentrations, varying from 4 to 90 mmol dm −3 . The samples were mechanically stirred for 3 h at 298 ± 1 K and the solid was separated by filtration.…”

“…10, is a straight line. The slope and intercept of this line were equal to (− H / 2.303R) and ( S/2.303R), respectively, thus allowing us to calculate H and S [20] and given in Table 3. As it can be seen from Table 3, positive H values represent the endothermic nature of the sorption process.…”

“…The reaction is favored and getting easier at higher temperatures. The positive value of S suggests the increased randomness at the solidsolution interface during the adsorption of copper on silica [20].…”

Adsorption of cesium on copper hexacyanoferrate–PAN composite ion exchanger from aqueous solution

“…Among these methods, ion exchange process has recently attracted a lot of attentions for removal of cesium from waste streams because of its convenience, efficiency and selectivity. Use of various materials has been previously reported for this technique [3][4][5][6][7].…”

Weathered Sand of Basalt as a Potential Nickel Adsorbent

“…Positive values of enthalpy (∆H o ) suggest endothermic nature of the Ni ions on WSB. The positive value of ∆S o suggests the increased randomness at the solid-solution interface during the adsorption of Ni ions on WSB, as many literature results about various adsorbents and adsorbates have shown [16,17]. To continue, the issue that the equilibrium constant of adsorption should be dimensionless in the thermodynamics calculation is discussed, and some alternatives to solve this problem are suggested.…”