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http://dx.doi.org/10.4491/KSEE.2015.37.8.450

Removal of Cs and Sr Ions by Absorbent Immobilized Zeolite with PVA  

Lee, Chang-Han (Department of Environmental Adminstration, Catholic University of Pusan)
Lee, Min-Gyu (Department of Chemical Engineering, Pukyong National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.37, no.8, 2015 , pp. 450-457 More about this Journal
Abstract
In this research a adsorbent, PVA-Zeolite bead, was prepared by immobilizing zeolite with PVA. The results of XRD and SEM analysis showed that the prepared PVA-Zeolite beads had porous structure and the zeolite particles were in mobilized within the internal matrix of the beads. The adsorption properties of Sr ion and Cs ion with the adsorbent were studied by different parameters such as effect of pH, adsorption rate, and adsorption isotherm. The adsorption of Sr ion and Cs ion reached equilibrium after 540 minutes. The adsorption kinetics of both ions by the PVA-Zeolite beads were fitted well by the pseudo-second-order model more than pseudo-first-order model. The equilibrium data fitted well with Langmuir isotherm model. The maximum adsorption capacities of Sr ion and Cs ion calculated from Langmuir isotherm model were 52.08 mg/g and 58.14 mg/g, respectively. The external mass transfer step was very fast compared to the intra-particle diffusion step in the adsorption process of Cs ion and Sr ion by the PVA-Zeolite beads. This result implied that the rate controlling step was the intra-particle diffusion step.
Keywords
Adsorption; Zeolite; Strontium; Cesium; Poly Vinyl Alcohol (PVA);
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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