Impregnation structure of cobalt ferrocyanide microparticles by the polymer chain grafted onto nylon fiber. Issue 9 (1st September 2016)

• Record Type: Journal Article
• Authors: Goto, Shota; Umino, Satoshi; Amakai, Wataru; Fujiwara, Kunio; Sugo, Takanobu; Kojima, Takashi; Kawai-Noma, Shigeko; Umeno, Daisuke; Saito, Kyoichi
• Is Part Of: Journal of nuclear science and technology. Volume 53:Issue 9(2016)
• Page Start: 1251
• Page End: 1255
• Publication Date: 2016-09-01
• Subjects: Cobalt ferrocyanide -- microparticle -- impregnation structure -- graft chain -- nylon fiber -- radiation chemistry -- cesium -- adsorption; Nuclear engineering -- Periodicals; Nuclear physics -- Periodicals; Nuclear energy -- Periodicals; 621.4805
• DOI: 10.1080/00223131.2016.1143886
• Languages: English
• ISSNs: 0022-3131

Abstract

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.