Selective Separation of Zr(IV) and Th(IV) by (polystyrene-divinylbenzene)-thiazolylazo Chelating Resins(I)

(Polystyrene-divinylbenzene)-thiazolylazo형 킬레이트 수지에 의한 Zr(IV) 및 Th(IV)의 선택적인 분리(I)

  • Lee, Won (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University) ;
  • Yook, Jin-Kyung (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University) ;
  • Lee, Si-Eun (Research Institute for Basic Sciences and Department of Chemistry, Kyunghee University) ;
  • Lee, Chang-Heon (Korea Atomic Energy Research Institute)
  • 이원 (경희대학교 기초과학연구소, 문리과대학 화학과) ;
  • 육진경 (경희대학교 기초과학연구소, 문리과대학 화학과) ;
  • 이시은 (경희대학교 기초과학연구소, 문리과대학 화학과) ;
  • 이창헌 (한국 원자력연구소 화학분석부)
  • Received : 2000.03.28
  • Published : 2000.06.25

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 $NH_4F$ as a masking agent. Characteristics of desorption were investigated with 0.1-2 M $HNO_3$ as desorption agent. It was found that 2 M $HNO_3$ 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

Acknowledgement

Supported by : 한국학술진흥재단

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