A Study on the Adsorption and Recovery of Metal Ions by Amberlite XAD Resins Impregnated with Oxime Compounds

Oxime 화합물을 침윤시킨 Amberlite XAD 수지에 의한 금속이온의 흡착 및 회수에 관한 연구

  • Dae Woon Lee (Department of Chemistry, Yonsei University) ;
  • Eum Chul Hun (Department of Chemistry, Yonsei University) ;
  • Young Hee Kim (Department of Chemistry, Korea Institute of Technology) ;
  • Euy Kyung Yu (Department of Chemistry, Sejong University)
  • 이대운 (연세대학교 이과대학 화학과) ;
  • 음철헌 (연세대학교 이과대학 화학과) ;
  • 김영희 (한국과학기술대학 화학과) ;
  • 유의경 (세종대학교 화학과)
  • Published : 1985.08.20

Abstract

The adsorption behaviors of some oxime compounds well known as metal chelating agents on the Amberlite XAD resins were compared by measuring their distribution coefficients (log Kd) in various media, respectively. Among the oxime compounds, salicylaldoxime (SAO) and $\alpha-benzoinoxime(${\alpha}$-BzO)$ which showed large log Kd values were chosen. The characteristics of XAD-4 resins impregnated with SAO and ${\alpha}$-BzO have been studied to apply them for the adsorption and recovery of minute quantities of metal ions in aqueous solution. The optimum conditions for adsorption of SAO and ${\alpha}$-BzO on the resin were 30% methanol media having pH range of 1~8(for SAO) and 1~9 (for ${\alpha}$-BzO), respectively. The distribution coefficients of two oxime compounds were decreased as temperature increased. From the adsorption enthalpy data of SAO and ${\alpha}$-BzO, ranging from 4.96 to 6.66 Kcal/mol, it is suggested that their adsorption mechanism on XAD-4 resin is likely due to molecular adsorption equivalent to dipole-dipole interaction. The impregnated resins were considerably stable in the aqueous solutions of pH 5.0~10.0 and in 0.1~5M hydrochloric acid solutions. The former is the medium for adsorption of metal ions, while the latter is for recovery of the adsorbed metal ions. The adsorption mole ratio of Mn(II), Co(II), Ni(II), Zn(II) ions on SAO-XAD-4 and ${\alpha}$-BzO-XAD-4 resins were about 1 : 2 at the optimum conditions, respectively. The adsorbed metal ions were recovered completely by eluting with 3M HCl-50% methanol solution

Keywords

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