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Selective Separation of Zr(IV) and Th(IV) by (polystyrene-divinylbenzene)-thiazolylazo Chelating Resins(I)
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2000, v.13 no.3, pp.323-331
Lee,
W., Yook,
J., Lee,
S., &
Lee,
C.
(2000). Selective Separation of Zr(IV) and Th(IV) by (polystyrene-divinylbenzene)-thiazolylazo Chelating Resins(I). Analytical Science and Technology, 13(3), 323-331.
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Abstract
Two chelating resins, XAD-16-TAC and XAD-16-TAO were synthesized by Amberlite XAD-16 macroreticular resin with 2-(2-thiazolylazo)-p-cresol (TAC) and 4-(2-thiazolylazo)-orcinol (TAO) as functional groups. The sorption behaviour of Zr(IV), Th(IV) and U(VI) with two chelating resins were examined with respect to the effect of pH and masking agent by batch methods. It was obtained that the optimum pH was in the range of 5-6, and two chelating resins showed good separation efficiency of Zr(IV) or Th(IV) by using <TEX>$NH_4F$</TEX> as a masking agent. Characteristics of desorption were investigated with 0.1-2 M <TEX>$HNO_3$</TEX> as desorption agent. It was found that 2 M <TEX>$HNO_3$</TEX> showed high desorption efficiency to most of metal ions except Zr(IV). XAD-16-TAC resin is applied to separation and preconcentration of trace Zr(IV) from mixed metal ions. Also, Th(IV) ion can be successfully separated from U(VI) and Zr(IV) ion by using XAD-16- TAO resin.
- keywords
- Chelating resin, Polystyrene-divinylbenzene, 2-(2-thiazolylazo)-p-cresol(TAC), 4-(2-thiazolylazo)-orcinol(TAO), Separation, Preconcenration
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