Fe3O4-loaded Ion Exchange Resin for Chromatographic Separation of Boron
Isotopes: Experiment and Numerical Simulation
Abstract
Fe3O4-loaded ion exchange resin composites (Fe3O4@Resin) were optimally
constructed through ion exchange and co-precipitation of Fe2+ and Fe3+
on strong acid ion exchange resin. The as-synthesized Fe3O4@Resin
composite was sophisticatedly characterized and investigated for 10B/11B
separation including effect of pH, kinetics and isotherms through batch
adsorption experiment which can be well described by pseudo-second order
kinetics and Langmuir model. In the chromatographic column packed with
Fe3O4@Resin, 10B was selectively retained with a high dynamic separation
factor of 1.312. Considering the consistency between simulated and
experimental breakthrough curves within Fe3O4@Resin packed column,
chromatographic 10B/11B separation performance was simulated under
various conditions which were further optimized by response surface
methodology method. Consequently, the annual yield of 10B reached the
maximum of 612 g with feed concentration of 7.567 g·L−1, flow rate of
38.57 mL·min−1, the length of column of 45 cm. In addition, five-cycle
adsorption/regeneration experiments indicated its merit of reusability.