【摘要】 在一些遗留核废物点及放射性废物地质处置库的长期环境影响评估中,钚往往是地下环境中放射性污染物的重点关注因子。钚在地下环境中的潜在迁移行为与其化学行为高度相关。该文综述了近年来国内外对钚在地下水环境中的化学行为研究成果,包括其在水溶液中不同p H/Eh条件下的存在形态、与地下水中无机配位体以及有机配位体之间的相互作用,着重讨论了地下水环境中铁矿、胶体物质、有机物、微生物等对钚化学行为的影响。最后,展望了国内未来该领域应开展的若干研究方向。更多还原

【Abstract】 Plutonium is often the subsurface contaminant of concern and remains a key contributor to potential actinide release in many legacy nuclear waste sites and permanent geologic repositories. The chemical behavior of plutonium has direct effect on its migration. In this papaer,some recent advances of the studies on chemical behavior of plutonium in the groundwater,based on model system studies and experimental studies were presented,including aqueous speciation of Pu as a function of p H and Eh,their interaction with common inorganic and organic ligands in natural groundwater. The interaction of Pu with common earth materials,including minerals,colloids,natural organic matter was highlighted. Finally,several key areas for future research on plutonium environmental speciation in China were proposed.更多还原