Abstract
ABSTRACTWith the fast development of nuclear power, low-level radioactive wastewater (LLRW) treatment will meet more severe requirements. Continuous electrodeionization (CEDI) is a novel technology to treat LLRW with advantages of lower level effluent and smaller waste production. In this study, the influences of ion exchange resins (IERs) in the concentrate and dilute compartments on the performance of CEDI were investigated. The three stacks filled with anion exchange resins in the dilute compartments were more efficient for boron removal than metal ions, while the three stacks filled with cation exchange resins were more efficient for the removal of metal ions than boron. The stack filled with a type of mixed IERs was good at removing both metal ions and boron. The correlation analysis showed that no significant correlations were found between ion exchange capacities or ion exchange kinetics with the decontamination factors of metal ions. The removal ratios of boron were positively correlated with the ion exchange capacities, but were not correlated with the ion exchange kinetics. The results can guide the CEDI stack design by filling different IERs for different purposes.
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