Pu在花岗岩中的吸附行为  

Sorption Behavior of Pu on Granite

作　　者：章英杰[1] 范显华[1] 苏锡光[1] 曾继述[1] 王勇[1] 周舵[1] 刘德军[1] 姚军[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2005年第3期136-143,共8页Journal of Nuclear and Radiochemistry

摘　　要：为了解Pu在甘肃北山地区地下深度约为600 m的花岗岩中的吸附行为,研究了各种水质(重蒸水、模拟地下水、BS03井地下水)、pH值(3.0～10.0)、CO2-3离子浓度(4.0×10-3～1.0×10-1 mol/L)、氧浓度等因素对吸附的影响.通过对吸附后水相物化参数(如pH值、Eh、电导率等)、Pu的价态、固相表面特征参数(比表面、孔径、总孔容等)等数据的比较以及解吸实验结果,推测可能的吸附机理:Pu在花岗岩上以表面配合物的形式吸附,且可用Freundlich吸附等温式描述.The sorption behavior of Pu on granite is studied with batch experiment and 1 mol/L HClO4 is used to dissolve the Pu sorped on granite at ambient temperature. Sorption experiments are performed under atmospheric and anaerobic conditions（in an argon glove box with an oxygen content of less than 5 × 10^-6mol · mol^-1 ）. Experimental results show that the sorption ability of Pu on granite is increased with increasing pH value（3.0-10.0） of the aqueous phase, and decreased with increasing carbonate ion concentration（4.0 × 10^-3 mol/L- 1.0 × 10^-1mol/L） in the aqueous phase. The oxygen concentration of the experimental condition is less influence on the sorption of Pu on granite. The sorption behavior of Pu on granite are irreversible. The sorption isotherms of Pu on granite can be well described by the Freundlich＇s equation.

关 键 词：PU 吸附 花岗岩 解吸 

分 类 号：TL942.21[核科学技术—辐射防护及环境保护]