Study on biological nano-colloids formation and its interaction with radionuclides

地下水中的纳米胶体具有促进放线系元素迁移的潜力。本研究对纳米胶体的生成过程、稳定性以及与微生物或矿物的相互作用进行了研究。我们发现，在微生物的细胞上形成纳米胶体的是三价放线(以稀土为替代物)，细胞裂解后它们是稳定的。此外，纳米胶体中的吖系元素吸附在微生物细胞表面，与矿物中的元素发生豆类交换。

Nano sized colloids in groundwater have a potential to enhance the migration of actinides. In this study the nano-colloids generation process, its stability, and the interaction with microorganisms or minerals have been studied. We have found that trivalent actinides(REEs are used as alternative) formed nano-colloids on the cell of microorganisms, and they are stable after the cells are lysed. In addition, actinides in the nano-colloids are adsorbed on microbial cell surface and cause legand exchange with elements in the minerals.