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In this study, factors affecting the adsorption reaction for the separation/recovery of V and W using Lewatit monoplus MP 600, a strong basic anion exchange resin, from the leachate obtained through the soda roasting-water leaching process from the spent SCR DeNOX catalyst investigated and the adsorption mechanism was discussed based on the results. In the case of the mixed solution of V and W, both ions showed a high adsorption ratio at pH 2-6, but the adsorption of W was greatly reduced at pH 8. In the adsorption isothermal experiment, both V and W were fitted well at the Langmuir adsorption isotherm, and the reaction kinetics were fitted well at pseudo-second-order. As a result of conducting an adsorption experiment by adjusting the pH with H2SO4 to remove Si, which inhibits the adsorption of V and W from the leachate, the lowest W adsorption ratio was SCR      /   39   29  5, 2020 1.     (NOx)            (Selective Catalytic Reduction : SCR)     .   (NH3)       N2 H2O      80~90%          . SCR    TiO2 Al2O3   V2O5, WO3, Fe2O3, CoO, NiO, MnO2, Cr2O3, CuO    .   SCR   V2O5WO3/TiO2   NOx   SO2             . SCR  2~5          ,   ,          .         ,               .      ,    (V) (W)           . ,    V, W                    . SCR  V W    (hydrometallurgy)  (soda roasting)(water leaching)   , NaOH, Na2CO3, NaCl  V W  NaVO3, Na2WO4     V W     .    , ,         ,               ,   ,   pH                     .                                         . Wu     Amberlite IRA900     SCR     98%    Jeon  SCR      MP600     . Hu      D296  pH 7.2          Yeh  SCR       PH 8    .   SCR         pH           , SCR   pH           .    SCR   -       /       ,    ∙    . shown at pH 8.5. Desorption of W was hardly achieved in strongly acidic solutions, and desorption of V was well performed in both strongly acidic and strongly basic solutions.

Separation Behavior of Vanadium and Tungsten from the Spent SCR DeNOX Catalyst by Strong Basic Anion Exchange Resin