Removal of low concentrations of radioactive cesium in agricultural water utilizing natural materials and elucidation of its adsorption mechanism

2016 Fiscal Year Final Research Report

• Project/Area Number: 26511008
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: 復興農学
• Research Institution: University of Fukui
• Principal Investigator: Miura Asa 福井大学, 学術研究院教育・人文社会系部門(教員養成), 准教授 (70585257)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 自然素材 / セシウム / 吸着 / 吸着速度 / 破過曲線 / 農業地域

Outline of Final Research Achievements

This study aims to select natural materials with the capability for Cs adsorption, and experimentally investigate the adsorption mechanism in order to remove low-concentration Cs from water bodies. Physical and chemical properties, adsorption isotherms, and adsorption processes of the natural materials were examined to exploit their Cs adsorption characteristics in situ. Based on the findings, carbonized rice hull and beech sawdust were selected as effective Cs adsorbents, which exhibited continuous or stable Cs adsorption rates. It was found that the Cs adsorption mechanism of both the materials involved ion exchange with K present in these adsorbents. It was revealed that the mechanism of Cs adsorption is derived from the characteristics of the natural materials.

Free Research Field

農業工学