title: A magnetic carbon sorbent for radioactive material from the Fukushima nuclear accident.
abstract: Here we present the first report of a carbon-γ-Fe₂O₃ nanoparticle composite of mesoporous carbon, bearing COOH- and phenolic OH- functional groups on its surface, a remarkable and magnetically separable adsorbent, for the radioactive material emitted by the Fukushima Daiichi nuclear power plant accident. Contaminated water and soil at a level of 1,739 Bq kg(-1) ((134)Cs and (137)Cs at 509 Bq kg(-1) and 1,230 Bq kg(-1), respectively) and 114,000 Bq kg(-1) ((134)Cs and (137)Cs at 38,700 Bq kg(-1) and 75,300 Bq kg(-1), respectively) were decontaminated by 99% and 90% respectively with just one treatment carried out in Nihonmatsu city in Fukushima. Since this material is remarkably high performance, magnetically separable, and a readily applicable technology, it would reduce the environmental impact of the Fukushima accident if it were used.
authors.affiliation: Department of Mechanical Engineering, Tsuyama National College of Technology, Institute of National Colleges of Technology, 624-1 Numa, Tsuyama-City, Okayama 708-8509, Japan.
authors.forename: Daizo
authors.initials: D
authors.lastname: Yamaguchi
authors.affiliation: Motoyama Gokin Seisakusyo Co., Ltd., 1645-20 Ayabe aza Midoriyama, Tsuyama-City, Okayama 708-1104, Japan.
authors.forename: Kazumi
authors.initials: K
authors.lastname: Furukawa
authors.affiliation: Motoyama Gokin Seisakusyo Co., Ltd., 1645-20 Ayabe aza Midoriyama, Tsuyama-City, Okayama 708-1104, Japan.
authors.forename: Masaya
authors.initials: M
authors.lastname: Takasuga
authors.affiliation: Department of Mechanical Engineering, Tsuyama National College of Technology, Institute of National Colleges of Technology, 624-1 Numa, Tsuyama-City, Okayama 708-8509, Japan.
authors.forename: Koki
authors.initials: K
authors.lastname: Watanabe
mesh_terms: D000327:Adsorption / Q000502:physiology*; D017554:Carbon Compounds, Inorganic; D002588:Cesium Radioisotopes / Q000378:metabolism; D003666:Decontamination / Q000295:instrumentation* / Q000379:methods*; D004777:Environment; D005290:Ferric Compounds / Q000737:chemistry; D062406:Fukushima Nuclear Accident; D007564:Japan; D060328:Magnetic Phenomena; D008280:Magnetics; D053768:Metal Nanoparticles; D011834:Radiation Monitoring; D011850:Radioactive Waste; D012990:Soil Pollutants, Radioactive / Q000378:metabolism; D013499:Surface Properties
chemical_list: D017554:Carbon Compounds, Inorganic; D002588:Cesium Radioisotopes; D005290:Ferric Compounds; D011850:Radioactive Waste; D012990:Soil Pollutants, Radioactive; C000499:ferric oxide