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Report No.

Development of accumulation technic of $$^{137}$$Cs using mushroom mycelium and minerals

Sakamoto, Fuminori  ; Kozai, Naofumi   ; Tanaka, Kazuya  ; Grambow, B.*

Six years have passed since the Fukushima Daiichi Nuclear Power accident. However, the decontamination of the forest area remains almost untouched. To develop an effective decontamination method for Fukushima forest soils, we first devised the method to estimate radioactivity of Cs-137 accumulated in fungal mycelium through testing Cs-137 accumulation by about 1500 strains of fungi and then prepared a flat decontamination bag composed of nutrient media, the fungal mycelium with a high Cs-137 accumulation efficiency, and a mixture of zeolite, vermiculite and phlogopite. The decontamination bag accumulated Cs-137 from the contaminated soil in Fukushima forest. Without the minerals, the accumulated Cs-137 was released to the environment after the death of the mycelium. By the addition of the minerals, the Cs-137 in the mycelium was stably fixed by the minerals after the death of the mycelium.



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