Factors
affecting the sorption of Eu(III) on modified silica gel</p>
</p> |
| |
| Authors: | E A A El-Shazly R R Sheha H H Someda |
| |
| Institution: | (1) Nuclear Chemistry Department, Radioisotopes Production and Radiation Sources Division, Hot Laboratories Center, Atomic Energy Authority, Post Code 13759, Cairo, Egypt;(2) Nuclear Chemistry Department, Radioisotopes Production and Radiation Sources Division, Hot Laboratories Center, Atomic Energy Authority, Post Code 13759, Cairo, Egypt;(3) Nuclear Chemistry Department, Radioisotopes Production and Radiation Sources Division, Hot Laboratories Center, Atomic Energy Authority, Post Code 13759, Cairo, Egypt |
| |
| Abstract: | Summary 8-Hydroxyquinoline
in benzene, xylene, chloroform and toluene diluents was used to modify silica
gel as a solid phase extractant (SPE) for the sorption of Eu(III) in batch
extraction techniques. Influences of solid/liquid ratio, pH, metal ion
concentration, particle size and temperature were studied. The optimum initial
pH is 4.2, while the maximum sorption capacities for the prepared impregnated
resins in benzene, xylene, chloroform and toluene diluents are 18.52, 14.98,
14.79 and 5.94 mg . g-1, respectively. The sorption
process is found to be affected by both metal ion concentration and particle
size of the impregnated resin. Thermodynamic parameters for the sorption of
Eu(III) were determined and the reaction is found to be exothermic and spontaneous
with enthalpy-14.23
and-23.71
kJ . mol-1 for benzene and xylene as diluents. Release of
the element from the loaded solid particles into 0.01M HNO3 is@85% and@53% from
8-HQ/benzene/silica gel and 8-HQ/xylene/silica gel.</p>
</p> |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
