Impregnation structure of cobalt ferrocyanide microparticles by the polymer chain grafted onto nylon fiber

Shota Goto, Satoshi Umino, Wataru Amakai, Kunio Fujiwara, Takanobu Sugo, Takashi Kojima, Shigeko Kawai-Noma, Daisuke Umeno, Kyoichi Saito*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


ABSTRACT: At Tokyo Electric Power Company (TEPCO) Fukushima Daiichi nuclear power plant (NPP), water contaminated with radionuclides such as Cs-137 and Sr-90 has been stored in tanks and seawater-intake area. We have prepared cobalt-ferrocyanide-impregnated fibers via four steps: the grafting of an epoxy-group-containing monomer, the conversion of the epoxy group into positively charged groups, the binding of ferrocyanide ions ([Fe(CN)6]4−), and the precipitation of cobalt ferrocyanide (Co2[Fe(CN)6]) by contact with cobalt ions. However, the impregnation structure of cobalt ferrocyanide microparticles onto the fiber remains unclear. Here, we describe the impregnation structure from the results of rebinding [Fe(CN)6]4− to the cobalt-ferrocyanide-impregnated fiber. The amount of [Fe(CN)6]4− re-bound onto the fiber was found to decrease with increasing amount of Co2[Fe(CN)6] initially impregnated. This suggests that the microparticles of cobalt ferrocyanide become entangled with the grafted polymer chains via multipoint electrostatic interactions.

Original languageEnglish
Pages (from-to)1251-1255
Number of pages5
JournalJournal of Nuclear Science and Technology
Issue number9
Publication statusPublished - 2016 Sept 1
Externally publishedYes


  • adsorption
  • cesium
  • Cobalt ferrocyanide
  • graft chain
  • impregnation structure
  • microparticle
  • nylon fiber
  • radiation chemistry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering


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