题目：放射性核素污染的生物去除

时间：2023年6月12日 13:30-15:00

地点：机械与动力工程学院 F301会议室

邀请人：吴艳 副教授 （核科学与工程学院）

报告人简介

大贯敏彦（OHNUKI, Toshihiko），日本东京工业大学名誉教授。

主要研究方向为环境中放射性核素的迁移行为、微生物代谢等生成的离子在反应后发生矿化现象、用微生物回收放射性铯和锶等元素、开拓锕系元素与微生物相互作用的新研究领域等方向。

1980年至今，在日本核能研究所、东京工业大学等机构从事环境安全研究工作。

报告摘要

In Fukushima Daiichi NPP reactors, groundwater microorganisms have continuously seeped into contaminated water. We have investigated the effect of siderophore-releasing microorganism (SB) on fuel debris analogues. Fuel debris analogue pellet samples (FDAPSs) and powder samples containing CeO2 (an alternative to UO2)-ZrO2 solid solution, and metallic iron were formed. FDAPSs were contacted with SB on a membrane filter placed on agar medium for 50 days. These results clarify that the presence of SB accelerates the degradation of fuel debris in which Fe metal regions are preferentially degraded, and some fractions of Fe were detached and migrated from the fuel debris analogue.