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Studies on the Sorption Behavior of Some Metal Ions using XAD-16-Chromotropic Acid Chelating Resin
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2004, v.17 no.6, pp.454-463
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(2004). Studies on the Sorption Behavior of Some Metal Ions using XAD-16-Chromotropic Acid Chelating Resin. Analytical Science and Technology, 17(6), 454-463.
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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 NH4F 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, HNO3, HClO4. 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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