Cesium desorption from biotite under redox oscillations (Fostering Joint International Research)

2017 Fiscal Year Final Research Report

• Project/Area Number: 16KK0174
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Plant nutrition/Soil science
• Research Institution: Kyoto Prefectural University
• Principal Investigator: Nakao Atsushi 京都府立大学, 生命環境科学研究科, 准教授 (80624064)
• Research Collaborator: Chorover Jon アリゾナ大学, 土水環境研究科, 教授 ; Root Robert アリゾナ大学, 土水環境研究科, 研究教授 ; Thompson Aaron ジョージア大学, 農業環境科学研究科, 教授
• Project Period (FY): 2016 – 2017
• Keywords: 嫌気性チャンバー / Cs固定黒雲母 / XRD / フェロジン法

Outline of Final Research Achievements

Cesium desorption behavior was investigated for Cs-fixing weathered biotite under oxic or anoxic conditions. Although changes in Fe status from ferrous to ferric and increase in the structural distortion of Cs-fixing biotite were confirmed through weathering under oxic condition, cesium desorption was not occurred. In contrast, cesium desorption from the biotite was progressed under anoxic condition, suggesting that soil-to-plant transfer risk of 137Cs may increase under anoxic conditions as in paddy field.

Free Research Field

土壌化学