Vertical profiles of Iodine-131 and Cesium-137 in soils in Fukushima Prefecture related to the Fukushima Daiichi Nuclear Power Station Accident

KAZUYA TANAKA; YOSHIO TAKAHASHI; AYA SAKAGUCHI; MIYUKI UMEO; SHINJIRO HAYAKAWA; HAJIME TANIDA; TAKASHI SAITO; YUTAKA KANAI

doi:10.2343/geochemj.1.0137

Notes

Vertical profiles of Iodine-131 and Cesium-137 in soils in Fukushima Prefecture related to the Fukushima Daiichi Nuclear Power Station Accident

KAZUYA TANAKA, YOSHIO TAKAHASHI, AYA SAKAGUCHI, MIYUKI UMEO, SHINJIRO HAYAKAWA, HAJIME TANIDA, TAKASHI SAITO, YUTAKA KANAI

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Keywords: Iodine-131, Cesium-137, clay minerals, humic substances, Fukushima

JOURNAL FREE ACCESS

2012 Volume 46 Issue 1 Pages 73-76

DOI https://doi.org/10.2343/geochemj.1.0137

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Abstract

Vertical profiles of iodine-131 and cesium-137 emitted from the Fukushima Daiichi Nuclear Power Station were determined in soil core samples collected in Fukushima prefecture. The profiles showed that more than 76% of the radionuclides were retained within 5 cm of the surface. Leaching experiments showed that cesium was strongly bound to soil particles which could not be leached with 2 M HCl, while more than 40% of iodine was incorporated into humic substances.

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