tungstate (FeW) of the formula Fe2OH(H3O+)W5O18.11H2O
was obtained in a granular form.
Structural, dehydration and ion
exchange properties of the material
were investigated. Equilibrium studies demonstrated that the H+-rich
FeW is beneficial with respect to Cs+ and Co2+ uptake.
Mobility and diffusion mechanism of the radionuclides into tungstate particles were
examined and discussed as a function of;
reaction temperature, metal ion concentration, particle size as well as the
drying temperature. Kinetic studies indicated that the diffusion coefficient (Di)
of Cs+ and Co2+ in tungstate particles was increased not
only in the order Cs+ > Co2+ but also with increasing
the drying temperature of particles. In
addition, the reduction in particle sizes of the FeW revealed an increase in
both the exchange rate and the diffusion coefficient. The values of diffusion coefficients as well as
the other thermodynamic parameters were calculated and compared with similar