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Studies on the Sorption Behavior of Some Metal Ions using XAD-16-Chromotropic Acid Chelating Resin  

Lee, Won (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University)
Kim, Mi-Kyoung (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University)
Kim, In-Whan (Department of Chemistry Education, Daegu University)
Kim, Jun-Yong (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University)
Kim, Jung-Sook (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University)
Publication Information
Analytical Science and Technology / v.17, no.6, 2004 , pp. 454-463 More about this Journal
Abstract
The sorption behavior of some metal ions on XAD-16-CTA chelating resin was investigated by batch method. The sorption of chelating resin was highly selective for Hf(IV), Zr(IV) and Th(IV) at pH 3.0 ~ 6.0 and the maximum sorption capacity of Zr(IV) ion was 0.81 mmol/g. It was successfully applied to the separation of several rare metal ions from mixed metal solutions by using CDTA, EDTA, NTA and $NH_4F$ as masking agent. The elution order of metal ions obtained from breakthrough capacity and the overall capacity at pH 4.0 was Zr(IV)>Th(IV)>Hf(IV)>U(VI)>Cu(II)>In(III)>Pb(II). Desorption characteristics for metal ions was investigated with desorption agents such as HCl, $HNO_3$, $HClO_4$. 2 M HCl showed high desorption efficiency. Th(IV) ion can be successfully separated from mixed metal ions by using XAD-16-CTA cheating resin.
Keywords
XAD-16-CTA chelating resin; breakthrough capacity; overall capacity; desorption;
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