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http://dx.doi.org/10.7844/kirr.2020.29.5.38

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

Heo, Seo-Jin (Department of Chemical Engineering, Kwangwoon University)
Jeon, Jong-Hyuk (Convergence Research Center for Development of Mineral Resources, Korea Institute of Geoscience & Mineral Resources)
Kim, Chul-Joo (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Chung, Kueong-Woo (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Jeon, Ho-Seok (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Yoon, Do-Young (Department of Chemical Engineering, Kwangwoon University)
Yoon, Ho-Sung (Mineral Resources Research Division, Korea Institute of Geoscience & Mineral Resources)
Publication Information
Resources Recycling / v.29, no.5, 2020 , pp. 38-47 More about this Journal
Abstract
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 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.
Keywords
Spent SCR $DeNO_X$ catalyst; Anion exchange resin; Adsorption; Vanadium; Tungsten;
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Times Cited By KSCI : 1  (Citation Analysis)
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