S. Qiu, Shun Li, Yamin Dong
Jul 1, 2017
Citations
0
Influential Citations
25
Citations
Journal
Journal of Molecular Liquids
Abstract
Abstract A novel impregnated resin with n-octyl diphenyl phosphate (ODP-IR) was developed for the separation of thorium from leaching solution of rare earth (RE) waste residue. Nitrogen adsorption, FT-IR spectra, scanning electron microscopy and energy dispersive spectrometer were conducted for the characterization of ODP-IR. Uptake of ODP-IR for Th4 + was significantly affected by changing HNO3 concentration. The adsorption data were fitted well with pseudo-second-order rate model. Thermodynamic parameters for the adsorption of Th4 + were calculated and discussed. The adsorption was fitted well with the Langmuir isotherm model than Freundlich isotherm model. ODP-IR was repeatedly used five times without obvious loss for Th4 + adsorption, indicating that the adsorbent was stabilized. The ODP-IR was successfully used to separate Th from RE and Fe using the feed solution from ion-adsorption type RE waste residue, which revealed potentials in the fields of RE resource utilization, radioactive contamination treatment and nuclear fuel preparation.