title: Simplified measurement method for dissolved radio-Cs in litter and soil seepage water using copper-substituted Prussian blue.
abstract: We developed a simple and rapid method for detecting dissolved radio-Cs in litter and/or soil seepage water using nonwoven fabrics impregnated with copper-substituted Prussian blue (Cu-NF). In laboratory and field experiments, litter and/or soil seepage water including dissolved radio-Cs were passed through traditional lysimeter systems combined with seven sheets of the Cu-NF. We then examined the recovery ratios of dissolved (137)Cs in the Cu-NF. In the laboratory experiments with faster flow rates (11-2200 mm h(-1)), over 86% of the total dissolved (137)Cs in litter seepage water was detected in the Cu-NF and over 82% of the collected (137)Cs was present in the first three sheets. In the field experiments, 99% of the total dissolved (137)Cs litter seepage water was collected in the Cu-NF and more than 96% of the collected (137)Cs was present in the first three sheets. Furthermore, the recovery ratio of dissolved (137)Cs increased with increasing installation Cu-NF length, probably because the packed soil in the Cu-NF lysimeter become more stable over time. Finally, because only the Cu-NF is measured, it is not necessary to undertake traditional measurement preparations such as filtration to remove particulate radio-Cs materials and evaporative concentration for low concentration of radio-Cs. As a result, we can save time and effort in measurement preparation by using the Cu-NF lysimeter method.
authors.affiliation: Graduate School of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521, Japan.
authors.forename: Momo
authors.initials: M
authors.lastname: Takada
authors.affiliation: National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan. Electronic address: t.yasutaka@aist.go.jp.
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Yasutaka
authors.affiliation: Graduate School of Integrated Arts and Sciences, Hiroshima University, 1-7-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8521, Japan.
authors.forename: Toshinori
authors.initials: T
authors.lastname: Okuda
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D003300:Copper / Q000032:analysis; D005295:Ferrocyanides / Q000737:chemistry*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D002588:Cesium Radioisotopes; D005295:Ferrocyanides; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D003300:Copper; C000170:ferric ferrocyanide
keywords: Cesium-137; Environmental monitoring; Forest soil; Litter; Lysimeter