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Received February 28, 2002
Accepted April 27, 2002
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Preparation of PAN-zeolite 4A Composite Ion Exchanger and its Uptake Behavior for Sr and Cs Ions in Acid Solution
Korea Atomic Energy Research Institute, Yuseong P.O. Box 105, Daejeon 305-600, Korea 1Department of Chemical Engineering, Yonsei University, Seoul 120-749, Korea
njkmoon@kaeri.re.kr
Korean Journal of Chemical Engineering, September 2002, 19(5), 838-842(5), 10.1007/BF02706978
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Abstract
A PAN-4A composite ion exchanger containing about 80% 4A powder was prepared to remove strontium and cesium ions from acidic solution. The SEM image of the fracture of composite bead showed that zeolite 4A powder was dispersed homogenously and the pores were well formed. The mean pore size of composite bead was 0.14 μm and its porosity was about 74%, which is much higher in comparison with the existing inorganic adsorbent beads. The acid and radiation stability tests showed that PAN-4A was stable against acid solution higher than pH 2 and radiation dose less than 1.89×10(8) rad, respectively. Ion exchange tests showed that the PAN-4A was selective for Sr ion. The distribution coefficients of PAN-4A for Sr and Cs ions at pH 2 were 2×10(4) mL/g and 280 mL/g, respectively. The ion exchange capacities (qs) of PAN-4A for Sr and Cs ions at pH 2, which are modeled by Dubinin-Polanyi equation, were 3.92 meq/g and 2.47 meq/g, respectively.
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Sinha PK, Panicker PK, Amalraj RV, Krishnasamy V, Waste Manage., 15(2), 149 (1995)
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