Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Strong Absorption of Cations into a Cation Exchange Resin in Concentrated HClO$_4$

  • Kim Sunho (Department of Chemistry, Korea University) ;
  • Kim Sung-Soo (Department of Chemistry, Korea University) ;
  • Kim Kang-Jin (Department of Chemistry, Korea University)
  • Published : 1985.08.20
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Abstract

The absorptions of Fe(Ⅲ), Tb(Ⅲ), Tl(Ⅰ), Ce(Ⅲ), Th(Ⅳ), and $UO_2^{2+}$ ions into the Dowex 50W-X2, 100-200 mesh resin were investigated by spectrophotometry to understand the abnormal strong absorption behavior of cations to cation exchange resins in concentrated HClO4. The distribution coefficients increase in the order : Tl(Ⅰ) < Fe(Ⅲ) < Tb(Ⅲ)∼Ce(Ⅲ) < $UO_2^{2+}$< Th(Ⅳ) and the order is interpreted in terms of the ratio of charge-to-ionic radius. The mole ratios of increment of $ClO_4^-$ ion absorption to metal ion absorption showed the same order as the distribution coefficients, which indicates that the electrostatic association between $ClO_4^-$ ion and metal ion plays a major role in the strong absorption.

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