钚在某处置工程屏障水环境中化学形态及影响因素  

Chemical Forms and Influence Factors of Plutonium in Environmental Water of a Disposal Engineering Barrier

作　　者：马应明[1] 何艺峰[1] 李哲[1] 刘莉[1] 刘艳[1] 石建芳[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《环境科学与技术》2013年第6期164-167,共4页Environmental Science & Technology

摘　　要：针对某放射性废物包装容器回填处置工程屏障结构特征,采用岩体裂隙水浸泡工程屏障样品的方式,在对各平衡水样化学成分分析的基础上,利用地球化学模拟软件EQ3/6对钚在回填工程屏障水环境中的存在化学形态进行了模拟计算,得出钚在回填工程屏障水环境中主要以Pu(Ⅳ)价态Pu(OH)5-形式存在,同时水环境中pH值和Eh值的变化皆会影响钚的存在化学形态和价态。Aimed at backfill structure in the engineering barrier of a certain disposal project, the geochemical modeling software, EQ3/6, was applied to simulate chemical forms of plutonium based on results of barrier samples leaching by the fracture water and chemical analysis of leaching samples. Results showed that the form of plutonium was Pu（OH）5-in Pu（IV） valence state. Changes of pH and Eh values in environmental water will affect the forms and valence state of plutonium.

关 键 词：钚 回填工程屏障 化学形态 EQ3 6 模拟计算 

分 类 号：X591[环境科学与工程—环境工程]