2022 Annual Meeting

Presentation information

Oral presentation

VII. Health Physics and Environmental Science » Health Physics and Environmental Science

[2F14-16] Environmental Radioactivity

Thu. Mar 17, 2022 4:15 PM - 5:15 PM Room F

Chair: Takeyoshi Sunagawa (FUT)

4:15 PM - 4:30 PM

[2F14] Evaluation of labile 137Cs in rivers in Fukushima prefecture by diffusive gradients in thin films (DGT)

(2)Examination in river basins

*Takuro Tanaka1, Takumi Saito1, Kanako Toda1, Kenso Fujiwara2, Motoki Terashima2, Takahiro Nakanishi2, Natsuko I Kobayashi1, Keitaro Tanoi1 (1. UTokyo, 2. JAEA)

Keywords:Diffusive gradients in thin films, Passive sampling, Labile Cesium, Suspended solid

137Cs dispersed by the Fukushima Daiichi Nuclear Power Plant accident deposited in Fukushima area, that are not decontaminated in mountainous areas, may migrate through river water to animals and plants. Most of 137Cs in river are fixed in clay minerals, but there are some Cs that can be easily desorbed, named as labile components. It has been suggested that labile components affect the bioavailability of 137Cs. In this study, the labile 137Cs was sampled in situ from upstream to downstream in several rivers of Fukushima using a passive sampler called diffusive gradients in thin films (DGT). Sampling was conducted at a different season in addition to the previous studies.