1 research outputs found
Kinetics and Thermodynamics Studies on the Recovery of Thorium Ions Using Amino Resins with Magnetic Properties
Magnetic
polymeric matrixces were synthesized from glycidyl methacrylate, <i>N</i>,<i>N</i>′-methylenebisÂ(acrylamide) (MBA),
and nanomagnetite particles. The obtained polymers were modified by
ethylenediamine (DA) and diethylenetriamine (TA) to produce two amino-magnetic
resins named R-DA and R-TA. The recovery of ThÂ(IV) ions from their
aqueous solutions by R-DA and R-TA were studied in the pH range 1–4.
Maximum adsorption capacity values of 60 and 84 mg/g of ThÂ(IV) ions
on R-DA and R-TA, respectively, were obtained at pH 3.5 and 293 K.
At a solid/liquid ratio (S/L) of 2 g/L, recovery efficiency values
of 86 and 95% were achieved from initial thorium ion concentration
of 100 mg/L using R-DA and R-TA, respectively. Adsorption isotherms
and kinetic and thermodynamic parameters of the adsorption process
were obtained and analyzed. Regeneration of the resins was tested
by eluting the loaded ThÂ(IV) ions on the spent resins using 0.2 M
HNO<sub>3</sub> followed by washing with dilute NaOH