title: Decontamination efficiencies of pot-type water purifiers for ¹³¹I, ¹³⁴Cs and ¹³⁷Cs in rainwater contaminated during Fukushima Daiichi nuclear disaster.
abstract: Rainwater was contaminated by a large release of radionuclides into the environment during the Fukushima Daiichi nuclear disaster. It became a matter of concern for Japan when several water purification plants detected ¹³¹I contamination in the drinking water. In the present study, the decontamination efficiency of two easily obtainable commercial water purifiers were examined for rainwater contaminated with ¹³¹I, ¹³⁴Cs and ¹³⁷Cs. The water purifiers removed 94.2-97.8% of the ¹³¹I and 84.2-91.5% of the ¹³⁴Cs and ¹³⁷Cs after one filtration. Seven filtrations removed 98.2-99.6% of the ¹³¹I and over 98.0% of the ¹³⁴Cs and ¹³⁷Cs. From a practical perspective, over the fourth filtrations were not needed because of no significant improvements after the third filtration.
authors.affiliation: Radioisotope Center, The University of Tokyo, Tokyo, Japan. shogo@ric.u-tokyo.ac.jp
authors.forename: Shogo
authors.initials: S
authors.lastname: Higaki
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hirota
mesh_terms: D002588:Cesium Radioisotopes / Q000302:isolation & purification; D003666:Decontamination; D004190:Disasters; D007457:Iodine Radioisotopes / Q000302:isolation & purification; D007564:Japan; D055848:Nuclear Power Plants; D018788:Radioactive Hazard Release; D011891:Rain / Q000737:chemistry; D014875:Water Pollutants, Radioactive / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D002588:Cesium Radioisotopes; D007457:Iodine Radioisotopes; D014875:Water Pollutants, Radioactive