Comparative Study of Cs-Uptake Performance by Potassium Iron(III) Hexacyanoferrate(II) Supported on Wood Chips and Activated Carbon

DOI Web Site 被引用文献3件 参考文献19件 オープンアクセス
  • Shiozaki Keiko
    Department of Chemical and Biological Technologies, Shikoku Research Institute, Inc.
  • Shigemoto Naoya
    Department of Chemical and Biological Technologies, Shikoku Research Institute, Inc.

書誌事項

公開日
2013
DOI
  • 10.1252/jcej.13we117
公開者
公益社団法人 化学工学会

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説明

Potassium iron(III) hexacyanoferrate(II) (K/Fe–Fe(CN)6) supported on wood chips (WC) was prepared and its Cs uptake in seawater was measured under batch agitation. The Cs-uptake behavior of this adsorbent was compared with that of K/Fe–Fe(CN)6 supported on activated carbon (AC), which had already been published. Applying the Elovich equation, both the WC and AC adsorbents showed a similar time-dependence for Cs adsorption reaction, suggesting the same size of K/Fe–Fe(CN)6 particles for Cs diffusion. From the Cs-adsorption isotherm (298 K), the maximum Cs uptake per unit mole of Fe(CN)6 supported on WC (0.423 mol/mol-Fe(CN)6–1) was 7-fold larger than that on AC (0.060 mol/mol-Fe(CN)6−1): this difference in the Cs uptake should be ascribed to that K/Fe–Fe(CN)6 particles being partially filled into rather large macropores of WC, whereas narrow macropores in AC were blocked by the K/Fe–Fe(CN)6. The Cs-distribution coefficient, Kd for K/Fe–Fe(CN)6-on-WC is larger than that for K/Fe–Fe(CN)6-on-AC when the equilibrium Cs concentration in solution is high.

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