title: Hybrid micro-particles as a magnetically-guidable decontaminant for cesium-eluted ash slurry.
abstract: Decontamination of the radioactive cesium that is widely dispersed owing to a nuclear power station accident and concentrated in fly ash requires an effective elimination system. Radioactive fly ash contains large amounts of water-soluble cesium that can cause severe secondary contamination and represents a serious health risk, yet its complete removal is complicated and difficult. Here it is shown that a new fine-powder formulation can be magnetically guided to eliminate cesium after being mixed with the ash slurry. This formulation, termed MagCE, consists of a ferromagnetic porous structure and alkaline- and salt-resistant nickel ferrocyanide. It has potent cesium-adsorption- and magnetic-separation-properties. Because of its resistance against physical and chemical attack such as with ash particles, as well as with the high pH and salt concentration of the ash slurry, MagCE simplifies the decontamination process without the need of the continued presence of the hazardous water-soluble cesium in the treated ash.
authors.affiliation: Faculty of Health Sciences, Ryotokuji University, 5-8-1 Akemi, Urayasu, Chiba 279-8567, Japan.
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Namiki
authors.affiliation: DOWA Electronics Materials Co., Ltd., 14-1 Soto Kanda, Tokyo 101-0021, Japan.
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Ueyama
authors.affiliation: DOWA Electronics Materials Co., Ltd., 14-1 Soto Kanda, Tokyo 101-0021, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yoshida
authors.affiliation: DOWA ECO-PUBLIC "-//NPG//DTD XML Article//EN" Co., Ltd., 14-1 Soto Kanda, Tokyo 101-0021, Japan.
authors.forename: Ryoei
authors.initials: R
authors.lastname: Watanabe
authors.affiliation: Division of Gastroenterology and Hepatology, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba 277-8567, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Koido
authors.affiliation: Department of Radiology, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba 277-8567, Japan.
authors.forename: Tamami
authors.initials: T
authors.lastname: Namiki