Studies on the Separation and Preconcentration of Metal Ions by Chelating Resin containing (Polystyrene-divinylbenzene)-thiazolylazo Phenol Derivatives(I)

(Polystyrene-divinylbenzene)-thiazolylazo phenol형 킬레이트 수지에 의한 금속이온의 분리 및 농축에 관한 연구(I)

  • Lim, Jae-Hee (Research Instituted for Basic Sciences and Department of Chemistry, Kyunghee University) ;
  • Kim, Min-Kyun (Research Instituted for Basic Sciences and Department of Chemistry, Kyunghee University) ;
  • Lee, Chang-Hun (Korea Atomic Energy Research Institute) ;
  • Lee, Won (Research Instituted for Basic Sciences and Department of Chemistry, Kyunghee University)
  • 임재희 (경희대학교 기초과학연구소, 문리과대학 화학과) ;
  • 김민균 (경희대학교 기초과학연구소, 문리과대학 화학과) ;
  • 이창헌 (한국원자력연구소 화학분석부) ;
  • 이원 (경희대학교 기초과학연구소, 문리과대학 화학과)
  • Received : 1996.07.13
  • Published : 1996.09.25

Abstract

The new chelating resins, XAD-2, 4, 16-TAC and XAD-2, 4, 16-TAO were synthesized by Amberlite XAD-2, XAD-4, and XAD-16 macroreticular resins with 2-(2-thiazolylazo)-p-cresol(TAC) and 4-(2-thiazolylazo)orcinol(TAO) as functional groups and were characterized by elemental analysis and FT-IR spectrometry. It was found that the content of functional group in chelating resin was 0.60mmol/g in XAD-16-TAC and 0.68mmol/g in XAD-16-TAO respectively. The chelating resins were stable in acidic and alkaline solution and can be reused over 10 times. The sorption behavior of some metalions to two chelating resins was investigated by batch method, which included batch equilibrium, effect of pH, coexisting ions and masking agent. For the optimum condition of sorption, the time required for equilibrium was about 1 hour and optimum pH was 5. In the presence of anions such as ${SO_4}^{2-}$ and $CH_3COO^-$, the sorption of U(VI) ion was slightly reduced but other anions such as $Cl^-$ and $NO{_3}^-$ revealed no interference effect. Also, sorption capacity of U(VI) ion was decreased by addition of $CO{_3}^{2-}$ ion because of complex formation of $[UO_2(CO_3)_3]^{4-}$, but alkali metals and alkali earth metals including Na(I), K(I), Mg(II), and Ca(II) were not affected for the sorption extent. Masking agent, NTA showed better separation efficiency of U(VI) ion from coexisting metal ions such as Th(IV), Zr(IV), Hf(IV), Cu(II), Cd(II), Pb(II), Ni(II), Zn(II) and Mn(II) than EDTA, CDTA.

Acknowledgement

Supported by : 교육부 기초과학연구소