摘要
The self-diffusion of E.3+ ion in porous resins D72 and D751 was studied by isotope exchange reaction. .Applying Kataoka’s bidisperse pore model, the intraparticle effective diffusivity De were resolved into a solid diffusivity Dg and a macropore diffusivity Dp. The experiments show that De, Dp and Dg all increase with the increase of reaction temperature; the response DP and Dg to temperature of D72 restin is more sensitive than that of D751; De, Dp and Dg of D721 resin is smaller that that of D72 resin; the diffusivity of Eu3+ ion in solution is larger than Dp, which leads to the conclusion that the diffusion of ion in the pore of resin can not completely be equal to that in solution.
The self-diffusion of E.3+ ion in porous resins D72 and D751 was studied by isotope exchange reaction. .Applying Kataoka's bidisperse pore model, the intraparticle effective diffusivity De were resolved into a solid diffusivity Dg and a macropore diffusivity Dp. The experiments show that De, Dp and Dg all increase with the increase of reaction temperature; the response DP and Dg to temperature of D72 restin is more sensitive than that of D751; De, Dp and Dg of D721 resin is smaller that that of D72 resin; the diffusivity of Eu3+ ion in solution is larger than Dp, which leads to the conclusion that the diffusion of ion in the pore of resin can not completely be equal to that in solution.
