A new biological method to retard dispersion of radioactive cesium from contaminated forests

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630489
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: OHNUKI Toshihiko 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・先端基礎研究センター, 研究員 (20354904)
• Co-Investigator(Kenkyū-buntansha): SAKAMOTO Fuminori 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・先端基礎研究センター, 研究員 (60391273) ; KOZAI Naofumi 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・先端基礎研究センター, 研究員 (80354877)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 放射性Cs / 森林汚染 / 拡散防止 / 廃菌床

Outline of Final Research Achievements

he accumulation of radioactive Cs by mycelia of filamentous fungi has been studied by combining agar medium method where mycelia is grown on the filter placed on the agar media containing 137Cs and minerals, with autoradiography analysis using imaging plate. The results showed that fungi accumulate radioactive Cs even when the mineral is present. To test ability of fungi for the remediation, We placed the spent mushroom substrate (SMS) which is kinds of waste after growing edible mushrooms for the in-situ remediation in Fukushima. The powder SMSs were placed in a forest for approximately 2 months. The concetrations of radioactive Cs in the spent mushroom substrates and soils beneath showed that the powder SMS is effective method to retard the dispersion of radioactive Cs from forests.

Free Research Field

原子力学