2021 Annual Meeting

Presentation information

Oral presentation

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

[3M05-08] Environmental Radioactivity & Radiation

Fri. Mar 19, 2021 10:45 AM - 12:00 PM Room M (Zoom room 13)

Chair: Masahiko Machida (JAEA)

11:00 AM - 11:15 AM

[3M06] Evaluation of labile 137Cs in Fukushima rivers by diffusive gradients in thin films (DGT)

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

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

There is a concern that 137Cs which remains untouched in mountainous areas is taken up by plants and animals or discharged to the sea through rivers. Most of 137Cs in river water are known to be fixed in clay minerals, but Cs ions bound to weathered edges of the minerals can be easily desorbed, contributing to the labile fraction of Cs and thus the bioavailability of 137Cs. In this study, the labile 137Cs was in situ sampled in rivers of Fukushima prefecture using a passive sampler called diffusive gradients in thin films (DGT). In the conference we will report the relationship of the labile fractions of 137Cs with those of dissolved/suspended 137Cs and the impacts of sampling locations.