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Studies on the Separation and Preconcentration of Metal Ions by Chelating Resin containing (Polystyrene-divinylbenzene)-thiazolylazo phenol Derivatives(II)
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.4, pp.364-372
Lim,
J., Seol,
K., An,
H., Chung,
K., Lee,
C., &
Lee,
W.
(1996). Studies on the Separation and Preconcentration of Metal Ions by Chelating Resin containing (Polystyrene-divinylbenzene)-thiazolylazo phenol Derivatives(II). Analytical Science and Technology, 9(4), 364-372.
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Abstract
The sorption and desorption properties of U(VI), Th(IV), Zr(IV), Cu(II), Pb(II), Ni(II), Zn(II), Cd(II) and Mn(II) ions on XAD-16-[2-(2-thiazolylazo)-p-cresol](TAC) chelating resin were studied by elution method for selective separation, concentration and recovery of trace metal ions in sea water. The optimum conditions for the sorption of metal ions were examined with respect to flow rate, pH and concentration of buffer solution. The overall capacities of some metal ions on this chelating resin were 0.41mmol U(VI)/g resin, 0.55mmol Th(IV)/g resin, 0.43mmol Cu(II)/g resin, and 0.32mmol Zr(IV)/g resin, respectively. The elution order of metal ions obtained from breakthrough capacity and overall capacity at pH 5.0 was found as Th(IV)>Cu(II)>U(VI)>Zr(IV)>Pb(II)>Ni(II)>Zn(II)>Cd(II)>Mn(II). Desorption of characteristics for metal ions were investigated with desorption agents such as <TEX>$HNO_3$</TEX>, HCl, <TEX>$HClO_4$</TEX>, <TEX>$H_2SO_4$</TEX>, and <TEX>$Na_2CO_3$</TEX>. It was found that most of metal ions except Zr(IV) showed high desorption efficiency with 2M <TEX>$HNO_3$</TEX>. But, desorption and recovery of Zr(IV) ion were successfully performed with 1M <TEX>$H_2SO_4$</TEX>. The resin was applied for separation and preconcentration of trace amount of U(VI) ion from artificial sea water and the recovery of U(IV) was over 96%.
- keywords
- chelating resin, polystyrene-divinylbenzene, 2-(2-thiazolylazo)-p-cresol, separation
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