Distribution of uranium on zeolite X and investigation of thermodynamic parameters for this system

Thermodynamics of Pb2+ and Ni2+ adsorption onto natural bentonite from aqueous solutions

“…The amounts of sorption of single metal ions by natural bentonite are measured in temperature 293-333 K. Thermo- dynamic parameters were calculated for this system by using the equation [29][30][31] …”

Uranium Sorption on Sodium Aluminosilicates and Gibbsite

“…However, the solids dissolved within the first day of the experiment and thus the samples obtained at or beyond 24 hours were not submitted for U analyses by ICP-MS. Table 4.1) proved similar to the previous sorption tests in that little observable uptake of U occurred during these experiments. The sorption of U on zeolites is a rapid process 1,2 and if operable, it should have occurred in these studies. Because no loss of U from solution was observed, solid phase NAS samples from the sorption studies were not submitted for surface area, X-ray diffraction (XRD) or X-ray absorption fine-structure (XAFS) spectroscopic analyses as originally planned in the Technical Task Plans (WSRC-RP-2001-01102, Rev.…”

Removal of uranium(VI) from aqueous solutions by manganese oxide coated zeolite: discussion of adsorption isotherms and pH effect

“…Krestou et al (2003) investigated the mechanism of aqueous uranium(VI) uptake by natural zeolitic tuff. Akyil et al (1998) also studied the distribution of uranium on zeolite and investigation of thermodynamic parameters for the uptake system. The use of natural materials including a clinoptilolite-bearing rock for the uptake of uranium from aqueous solutions in the presence of NaCl or NaHCO 3 was also investigated by Ames et al (1983).…”