Pu在地质介质中的分配系数及影响因素分析  

Distribution Coefficient of Plutonium on Geological Medium and Factor Effect

作　　者：于静[1] 司高华[1] 黄云贵[1] 刘勇[1] 贾海红[1] 郑军芳[1] 王旭辉[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2期119-123,共5页Journal of Nuclear and Radiochemistry

摘　　要：用静态法实验测定了Pu（Ⅳ）和Pu（Ⅴ）在风积沙、沙黄土、沙砾石、铁及其氧化物中的分配系数,比较了Pu（Ⅳ）和Pu（Ⅴ）在几种介质上的吸附性能,并采用两种不同的Pu（Ⅳ）示踪液制备方法测定Pu（Ⅳ）在风积沙、沙黄土、沙砾石上的分配系数。结果表明,Pu（Ⅳ）和Pu（Ⅴ）在砂土中的分配系数为103~104mL/g量级,Pu（Ⅴ）在铁及其氧化物中的分配系数为105~106mL/g量级,铁氧化物介质对Pu的吸附性最强,其次为粘土矿物含量大的介质;Pu（Ⅳ）比Pu（Ⅴ）更强的吸附在砂土上;Pu（Ⅳ）示踪液的制备采用两种不同方法时,在制备过程中Pu（Ⅳ）形成的化合物不同,其在砂土上的分配系数会随之不同。The distribution coefficients of Pu（Ⅳ） and Pu（Ⅴ） between aeolian sand,sandy soil,or gravel soil and water,and of Pu（Ⅴ） between iron or iron oxides and water were determined with batch experiments.Various factors that affect the plutonium sorption were examined,including the soil composition,the oxidation state of Pu,and the method for preparation of Pu spike solutions.The sorption of Pu（Ⅳ） in soil is found more stronger than that of Pu（Ⅴ）.Their distribution coefficients in clayey silt are in the range of 103-104 mL/g,while those of Pu（Ⅴ） in iron oxides reach as high as 105-106 mL/g.A higher clay content in clayey silt favarites the sorption of plutonium.The method for preparation of Pu spike solutions also influences the distribution coefficient of plutonium even all other experimental conditions are kept unchanged.

关 键 词：PU 静态法 分配系数 影响因素 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护]