title: Radiocesium removal system for environmental water and drainage.
abstract: With the development of the nuclear power generation, it is expected that severe pollution of environmental water by radiocesium (r-Cs) may occur. We developed a r-Cs removal system with a continuous stirring tank reactor (CSTR) and r-Cs adsorbent of non-woven fiber immobilizing Prussian blue nanoparticles (PBN). Results confirmed that this system can remove r-Cs from environmental water with a removal rate higher than 80% at processing speed of 2 m3/h. In this study, the processing speed and processing capacity of this system were confirmed using kinetic and equilibrium analyses of Cs adsorption behavior on PBN. The equilibrium of Cs adsorption was analyzed using a Langmuir equation. Results show that the maximum adsorption capacity was 160 mg/g (PBN). The kinetic data were well fitted using a pseudo-first order kinetic model. This rate constant was correlated to the PBN/liquid ratio in the system.
authors: Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan. Electronic address: kimitaka-minami@aist.go.jp.
authors: Kimitaka
authors: K
authors: Minami
authors: Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan.
authors: Koji
authors: K
authors: Sakurai
authors: Tokyo Power Technology Ltd., 2-3-6 Ohnodai, Chiba, 267-0056, Japan.
authors: Ramon
authors: R
authors: Kanai
authors: Tokyo Power Technology Ltd., 2-3-6 Ohnodai, Chiba, 267-0056, Japan.
authors: Yousuke
authors: Y
authors: Asanuma
authors: Japan Vilene Company, Ltd., 7 Kitatone, Koga, 306-0213, Japan.
authors: Tatsuya
authors: T
authors: Kawasaki
authors: Japan Vilene Company, Ltd., 7 Kitatone, Koga, 306-0213, Japan.
authors: Yukio
authors: Y
authors: Kojima
authors: Japan Vilene Company, Ltd., 7 Kitatone, Koga, 306-0213, Japan.
authors: Takeshi
authors: T
authors: Kobayashi
authors: Tokyo Power Technology Ltd., 2-3-6 Ohnodai, Chiba, 267-0056, Japan.
authors: Ryuichi
authors: R
authors: Kamimura
authors: Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Japan. Electronic address: tohru.kawamoto@aist.go.jp.
authors: Tohru
authors: T
authors: Kawamoto
mesh_terms: D000327:Adsorption; D007700:Kinetics; D014867:Water; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water
keywords: Adsorbent; Cesium; Complete mixing reactor; Decontamination process; Non-woven fiber; Prussian blue