2023 Annual Meeting

Presentation information

Oral presentation

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

[2B05-09] Environmental Radiation in Fukushima River

Tue. Mar 14, 2023 10:35 AM - 12:00 PM Room B (11 Bildg.1F 1102)

Chair:Hiroaki Terada(JAEA)

10:35 AM - 10:50 AM

[2B05] Evaluation of labile 137Cs in Fukushima rivers by diffusive gradients in thin films (DGT)

(3) Relations between geochemical parameters

*Takuro Tanaka1, Takumi Saito1, Kanako Toda1, Kenso Fujiwara2, Motoki Terashima2, Takahiro Nakanishi2, Natsuko I Kobayashi1, Keitaro Tanoi1, Hiroaki Kato3 (1. UTokyo, 2. JAEA, 3. Univ. of Tsukuba)

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, labile 137Cs was sampled in-situ from upstream to downstream in several rivers of Fukushima using passive samplers called diffusive gradients in thin films (DGT). The desorption behavior of labile components and factors affecting it will be discussed by examining the relationship with particulate 137Cs and geochemical parameters in river water.