^(239)Pu在泥岩和砂岩上的吸附分配系数  

Distribution Coefficient of Plutonium on Sandstone and Mudstone

作　　者：于静[1] 王旭辉[1] 金玉仁[1] 黄能斌[1] 司高华[1] 贾海红[1] 刘东旭[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《核化学与放射化学》2011年第3期173-178,共6页Journal of Nuclear and Radiochemistry

摘　　要：通过静态批式法研究放射性核素中具有代表性的核素239Pu在泥岩和砂岩中的吸附情况以及多种影响Pu在泥岩、砂岩中吸附性能的因素。实验测定了泥岩、砂岩中239Pu的分配系数,考察了岩石粒径、水相pH值、固液比和溶液离子对吸附分配系数的影响。结果表明,Pu在泥岩和砂岩中的分配系数分别为120 mL/g和1.60×104mL/g,砂岩对Pu有较强的吸附性;239Pu的吸附分配系数随岩石粒径的减小、水相pH的增大、固液比的增大而增大;硝酸溶液体系中,239Pu在岩石中的吸附性强于模拟地下水体系。The sorption distribution coefficients Kd of plutonium on mudstone and sandstone are studied by batch experiments.The experimental factors influencing Kd are stone granularity,the pH value of the aqueous phase,the solid-to-liquid ratio,different ions existing in aqueous phase.It is shown Kd of Pu on mudstone is about 120 mL/g,Kd of Pu on sandstone is 1.60×104 mL/g.The sandstone has greater sorption ability of Pu than mudstone.It is indicated that the Kd of Pu is increasing while granularity of rock minimizing,pH and ratio of solid and liquid increasing;the sorption of Pu on rocks is strongly in aqueous nitrate solution than simulated groundwater.

关 键 词：239Pu 静态法 分配系数 

分 类 号：TL941.21[核科学技术—辐射防护及环境保护]